The driver fails to check the results of DMA mapping in twp places, which results
in the following warning:
[ 28.078515] ------------[ cut here ]------------
[ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
[ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver failed to check map error[device address=0x00000000b5d60d6c] [size=1876 bytes] [mapped as
single]
[ 28.078536] Modules linked in: bnep bluetooth vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu rtl8192c_common rtlwifi mac802
11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer snd_seq_device snd k8temp
cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4 jbd2 mbcache crc1
6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic pata_amd
[ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O 3.10.0-rc7-wl+ #42
[ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700 Notebook PC/30D6, BIOS F.27 11/27/2008
[ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898 ffff8800bbb03b18
[ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480 ffff8800b7b9c010
[ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754 ffff8800bbb03b78
[ 28.078622] Call Trace:
[ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
[ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
[ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
[ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
[ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
[ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
[ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
[ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
[ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
[ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
[ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
--snip--
[ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
[ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
[ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
[ 28.078984] Mapped at:
[ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
[ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
[ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
[ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
[ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
As the patch adds a new failure mechanism to dma_rxfill(). When I changed the
comment at the start of the routine to add that information, I also polished
the wording.
Signed-off-by: Larry Finger <[email protected]>
Cc: Stable <[email protected]>
Cc: Brett Rudley <[email protected]>
Cc: Arend van Spriel <[email protected]>
Cc: Franky (Zhenhui) Lin <[email protected]>
Cc: Hante Meuleman <[email protected]>
Cc: [email protected]
---
V2 - fixed two patch errors.
---
drivers/net/wireless/brcm80211/brcmsmac/dma.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/dma.c b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
index 1860c57..6260571 100644
--- a/drivers/net/wireless/brcm80211/brcmsmac/dma.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
@@ -1015,9 +1015,10 @@ static bool dma64_txidle(struct dma_info *di)
/*
* post receive buffers
- * return false is refill failed completely and ring is empty this will stall
- * the rx dma and user might want to call rxfill again asap. This unlikely
- * happens on memory-rich NIC, but often on memory-constrained dongle
+ * return false is refill failed completely or dma mapping failed. The ring
+ * is empty, which will stall the rx dma and user might want to call rxfill
+ * again asap. This is unlikely to happen on a memory-rich NIC, but often on
+ * memory-constrained dongle
*/
bool dma_rxfill(struct dma_pub *pub)
{
@@ -1078,6 +1079,8 @@ bool dma_rxfill(struct dma_pub *pub)
pa = dma_map_single(di->dmadev, p->data, di->rxbufsize,
DMA_FROM_DEVICE);
+ if (dma_mapping_error(di->dmadev, pa))
+ return false;
/* save the free packet pointer */
di->rxp[rxout] = p;
@@ -1284,7 +1287,8 @@ static void dma_txenq(struct dma_info *di, struct sk_buff *p)
/* get physical address of buffer start */
pa = dma_map_single(di->dmadev, data, len, DMA_TO_DEVICE);
-
+ if (dma_mapping_error(di->dmadev, pa))
+ return;
/* With a DMA segment list, Descriptor table is filled
* using the segment list instead of looping over
* buffers in multi-chain DMA. Therefore, EOF for SGLIST
--
1.8.1.4
On Tue, Jul 02, 2013 at 10:53:13PM +0200, Arend van Spriel wrote:
> On 07/02/2013 06:06 PM, Larry Finger wrote:
> >The driver fails to check the results of DMA mapping in twp places, which results
> >in the following warning:
> >
> >[ 28.078515] ------------[ cut here ]------------
> >[ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
> >[ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver failed to check map error[device address=0x00000000b5d60d6c] [size=1876 bytes] [mapped as
> > single]
> >[ 28.078536] Modules linked in: bnep bluetooth vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu rtl8192c_common rtlwifi mac802
> >11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer snd_seq_device snd k8temp
> > cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4 jbd2 mbcache crc1
> >6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic pata_amd
> >[ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O 3.10.0-rc7-wl+ #42
> >[ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700 Notebook PC/30D6, BIOS F.27 11/27/2008
> >[ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898 ffff8800bbb03b18
> >[ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480 ffff8800b7b9c010
> >[ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754 ffff8800bbb03b78
> >[ 28.078622] Call Trace:
> >[ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
> >[ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
> >[ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
> >[ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
> >[ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
> >[ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
> >[ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
> >[ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
> >[ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
> >[ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
> >[ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
> >--snip--
> >[ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
> >[ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
> >[ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
> >[ 28.078984] Mapped at:
> >[ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
> >[ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
> >[ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
> >[ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
> >[ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
> >
> >As the patch adds a new failure mechanism to dma_rxfill(). When I changed the
> >comment at the start of the routine to add that information, I also polished
> >the wording.
> >
> >Signed-off-by: Larry Finger <[email protected]>
> >Cc: Stable <[email protected]>
> >Cc: Brett Rudley <[email protected]>
> >Cc: Arend van Spriel <[email protected]>
> >Cc: Franky (Zhenhui) Lin <[email protected]>
> >Cc: Hante Meuleman <[email protected]>
> >Cc: [email protected]
> >---
> >
> >V2 - fixed two patch errors.
>
> Hi Larry,
>
> Are you planning to do a V3, ie. address my review comments sent
> earlier today? I can resend them if needed.
>
> Regards,
> Arend
Is there going to be a V3?
--
John W. Linville Someday the world will need a hero, and you
[email protected] might be all we have. Be ready.
On 07/18/2013 09:59 PM, John W. Linville wrote:
> On Tue, Jul 02, 2013 at 10:53:13PM +0200, Arend van Spriel wrote:
>> On 07/02/2013 06:06 PM, Larry Finger wrote:
>>> The driver fails to check the results of DMA mapping in twp places, which results
>>> in the following warning:
>>>
>>> [ 28.078515] ------------[ cut here ]------------
>>> [ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
>>> [ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver failed to check map error[device address=0x00000000b5d60d6c] [size=1876 bytes] [mapped as
>>> single]
>>> [ 28.078536] Modules linked in: bnep bluetooth vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu rtl8192c_common rtlwifi mac802
>>> 11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer snd_seq_device snd k8temp
>>> cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4 jbd2 mbcache crc1
>>> 6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic pata_amd
>>> [ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O 3.10.0-rc7-wl+ #42
>>> [ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700 Notebook PC/30D6, BIOS F.27 11/27/2008
>>> [ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898 ffff8800bbb03b18
>>> [ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480 ffff8800b7b9c010
>>> [ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754 ffff8800bbb03b78
>>> [ 28.078622] Call Trace:
>>> [ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
>>> [ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
>>> [ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
>>> [ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
>>> [ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
>>> [ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
>>> [ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
>>> [ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
>>> [ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
>>> [ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
>>> [ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
>>> --snip--
>>> [ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
>>> [ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
>>> [ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
>>> [ 28.078984] Mapped at:
>>> [ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
>>> [ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
>>> [ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
>>> [ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
>>> [ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
>>>
>>> As the patch adds a new failure mechanism to dma_rxfill(). When I changed the
>>> comment at the start of the routine to add that information, I also polished
>>> the wording.
>>>
>>> Signed-off-by: Larry Finger <[email protected]>
>>> Cc: Stable <[email protected]>
>>> Cc: Brett Rudley <[email protected]>
>>> Cc: Arend van Spriel <[email protected]>
>>> Cc: Franky (Zhenhui) Lin <[email protected]>
>>> Cc: Hante Meuleman <[email protected]>
>>> Cc: [email protected]
>>> ---
>>>
>>> V2 - fixed two patch errors.
>>
>> Hi Larry,
>>
>> Are you planning to do a V3, ie. address my review comments sent
>> earlier today? I can resend them if needed.
>>
>> Regards,
>> Arend
>
> Is there going to be a V3?
>
Hi Larry
Do you want me to take this one of your shoulder and have a shot at it?
Regards,
Arend
On 07/02/2013 06:06 PM, Larry Finger wrote:
> The driver fails to check the results of DMA mapping in twp places, which results
> in the following warning:
>
> [ 28.078515] ------------[ cut here ]------------
> [ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
> [ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver failed to check map error[device address=0x00000000b5d60d6c] [size=1876 bytes] [mapped as
> single]
> [ 28.078536] Modules linked in: bnep bluetooth vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu rtl8192c_common rtlwifi mac802
> 11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer snd_seq_device snd k8temp
> cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4 jbd2 mbcache crc1
> 6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic pata_amd
> [ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O 3.10.0-rc7-wl+ #42
> [ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700 Notebook PC/30D6, BIOS F.27 11/27/2008
> [ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898 ffff8800bbb03b18
> [ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480 ffff8800b7b9c010
> [ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754 ffff8800bbb03b78
> [ 28.078622] Call Trace:
> [ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
> [ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
> [ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
> [ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
> [ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
> [ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
> [ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
> [ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
> [ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
> [ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
> [ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
> --snip--
> [ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
> [ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
> [ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
> [ 28.078984] Mapped at:
> [ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
> [ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
> [ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
> [ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
> [ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
>
> As the patch adds a new failure mechanism to dma_rxfill(). When I changed the
> comment at the start of the routine to add that information, I also polished
> the wording.
>
> Signed-off-by: Larry Finger <[email protected]>
> Cc: Stable <[email protected]>
> Cc: Brett Rudley <[email protected]>
> Cc: Arend van Spriel <[email protected]>
> Cc: Franky (Zhenhui) Lin <[email protected]>
> Cc: Hante Meuleman <[email protected]>
> Cc: [email protected]
> ---
>
> V2 - fixed two patch errors.
Hi Larry,
Are you planning to do a V3, ie. address my review comments sent earlier
today? I can resend them if needed.
Regards,
Arend
> ---
> drivers/net/wireless/brcm80211/brcmsmac/dma.c | 12 ++++++++----
> 1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/wireless/brcm80211/brcmsmac/dma.c b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
> index 1860c57..6260571 100644
> --- a/drivers/net/wireless/brcm80211/brcmsmac/dma.c
> +++ b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
> @@ -1015,9 +1015,10 @@ static bool dma64_txidle(struct dma_info *di)
>
> /*
> * post receive buffers
> - * return false is refill failed completely and ring is empty this will stall
> - * the rx dma and user might want to call rxfill again asap. This unlikely
> - * happens on memory-rich NIC, but often on memory-constrained dongle
> + * return false is refill failed completely or dma mapping failed. The ring
> + * is empty, which will stall the rx dma and user might want to call rxfill
> + * again asap. This is unlikely to happen on a memory-rich NIC, but often on
> + * memory-constrained dongle
> */
> bool dma_rxfill(struct dma_pub *pub)
> {
> @@ -1078,6 +1079,8 @@ bool dma_rxfill(struct dma_pub *pub)
>
> pa = dma_map_single(di->dmadev, p->data, di->rxbufsize,
> DMA_FROM_DEVICE);
> + if (dma_mapping_error(di->dmadev, pa))
> + return false;
>
> /* save the free packet pointer */
> di->rxp[rxout] = p;
> @@ -1284,7 +1287,8 @@ static void dma_txenq(struct dma_info *di, struct sk_buff *p)
>
> /* get physical address of buffer start */
> pa = dma_map_single(di->dmadev, data, len, DMA_TO_DEVICE);
> -
> + if (dma_mapping_error(di->dmadev, pa))
> + return;
> /* With a DMA segment list, Descriptor table is filled
> * using the segment list instead of looping over
> * buffers in multi-chain DMA. Therefore, EOF for SGLIST
>
On 07/02/2013 03:53 PM, Arend van Spriel wrote:
> On 07/02/2013 06:06 PM, Larry Finger wrote:
>> The driver fails to check the results of DMA mapping in twp places, which results
>> in the following warning:
>>
>> [ 28.078515] ------------[ cut here ]------------
>> [ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
>> [ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver failed to
>> check map error[device address=0x00000000b5d60d6c] [size=1876 bytes] [mapped as
>> single]
>> [ 28.078536] Modules linked in: bnep bluetooth vboxpci(O) vboxnetadp(O)
>> vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu rtl8192c_common rtlwifi
>> mac802
>> 11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel kvm_amd
>> snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer snd_seq_device snd
>> k8temp
>> cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore cdrom
>> i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4 jbd2 mbcache crc1
>> 6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic
>> pata_amd
>> [ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O
>> 3.10.0-rc7-wl+ #42
>> [ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700 Notebook
>> PC/30D6, BIOS F.27 11/27/2008
>> [ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898
>> ffff8800bbb03b18
>> [ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480
>> ffff8800b7b9c010
>> [ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754
>> ffff8800bbb03b78
>> [ 28.078622] Call Trace:
>> [ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
>> [ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
>> [ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
>> [ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
>> [ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
>> [ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
>> [ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
>> [ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
>> [ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
>> [ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
>> [ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
>> --snip--
>> [ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
>> [ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
>> [ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
>> [ 28.078984] Mapped at:
>> [ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
>> [ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
>> [ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
>> [ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
>> [ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
>>
>> As the patch adds a new failure mechanism to dma_rxfill(). When I changed the
>> comment at the start of the routine to add that information, I also polished
>> the wording.
>>
>> Signed-off-by: Larry Finger <[email protected]>
>> Cc: Stable <[email protected]>
>> Cc: Brett Rudley <[email protected]>
>> Cc: Arend van Spriel <[email protected]>
>> Cc: Franky (Zhenhui) Lin <[email protected]>
>> Cc: Hante Meuleman <[email protected]>
>> Cc: [email protected]
>> ---
>>
>> V2 - fixed two patch errors.
>
> Hi Larry,
>
> Are you planning to do a V3, ie. address my review comments sent earlier today?
> I can resend them if needed.
It would be best if you resent them. I don't seem to be able to find them in my
mailbox.
Larry
On 08/10/2013 02:54 AM, Arend van Spriel wrote:
> On 08/10/13 00:05, Larry Finger wrote:
>> On 08/09/2013 12:36 PM, John W. Linville wrote:
>>> From: "John W. Linville" <[email protected]>
>>>
>>> The driver fails to check the results of DMA mapping in twp places,
>>> which results in the following warning:
>>>
>>> [ 28.078515] ------------[ cut here ]------------
>>> [ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
>>> [ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver
>>> failed to check map error[device address=0x00000000b5d60d6c]
>>> [size=1876 bytes] [mapped as
>>> single]
>>> [ 28.078536] Modules linked in: bnep bluetooth vboxpci(O)
>>> vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu
>>> rtl8192c_common rtlwifi mac802
>>> 11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel
>>> kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer
>>> snd_seq_device snd k8temp
>>> cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore
>>> cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4
>>> jbd2 mbcache crc1
>>> 6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh
>>> ata_generic pata_amd
>>> [ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O
>>> 3.10.0-rc7-wl+ #42
>>> [ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700
>>> Notebook PC/30D6, BIOS F.27 11/27/2008
>>> [ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898
>>> ffff8800bbb03b18
>>> [ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480
>>> ffff8800b7b9c010
>>> [ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754
>>> ffff8800bbb03b78
>>> [ 28.078622] Call Trace:
>>> [ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
>>> [ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
>>> [ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
>>> [ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
>>> [ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
>>> [ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
>>> [ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
>>> [ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
>>> [ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
>>> [ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
>>> [ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
>>> --snip--
>>> [ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
>>> [ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
>>> [ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
>>> [ 28.078984] Mapped at:
>>> [ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
>>> [ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
>>> [ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
>>> [ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
>>> [ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
>>>
>>> As the patch adds a new failure mechanism to dma_rxfill(). When I
>>> changed the
>>> comment at the start of the routine to add that information, I also
>>> polished
>>> the wording.
>>>
>>> Signed-off-by: Larry Finger <[email protected]>
>>> Cc: Stable <[email protected]>
>>> Cc: Brett Rudley <[email protected]>
>>> Cc: Arend van Spriel <[email protected]>
>>> Cc: Franky (Zhenhui) Lin <[email protected]>
>>> Cc: Hante Meuleman <[email protected]>
>>> Cc: [email protected]
>>> Signed-off-by: John W. Linville <[email protected]>
>>> ---
>>> Did this one get lost?
>>>
>>> V2 - fixed two patch errors.
>>> V3 - address comments from Arend (linville)
>>>
>>
>> For some reason, I never got the mail containing Arend's comments, and I
>> forgot about it. If John's V3 fixes take care of them, then it should be
>> pushed.
>
> Weird as I resend the comments. Do you have me on a blacklist ;-)
No. As you can see, this message came through. I also checked to make sure that
my intermediate mailer had not put your message in its spam bucket.
Larry
From: "John W. Linville" <[email protected]>
The driver fails to check the results of DMA mapping in twp places,
which results in the following warning:
[ 28.078515] ------------[ cut here ]------------
[ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
[ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver failed to check map error[device address=0x00000000b5d60d6c] [size=1876 bytes] [mapped as
single]
[ 28.078536] Modules linked in: bnep bluetooth vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu rtl8192c_common rtlwifi mac802
11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer snd_seq_device snd k8temp
cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4 jbd2 mbcache crc1
6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic pata_amd
[ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O 3.10.0-rc7-wl+ #42
[ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700 Notebook PC/30D6, BIOS F.27 11/27/2008
[ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898 ffff8800bbb03b18
[ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480 ffff8800b7b9c010
[ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754 ffff8800bbb03b78
[ 28.078622] Call Trace:
[ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
[ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
[ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
[ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
[ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
[ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
[ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
[ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
[ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
[ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
[ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
--snip--
[ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
[ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
[ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
[ 28.078984] Mapped at:
[ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
[ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
[ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
[ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
[ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
As the patch adds a new failure mechanism to dma_rxfill(). When I changed the
comment at the start of the routine to add that information, I also polished
the wording.
Signed-off-by: Larry Finger <[email protected]>
Cc: Stable <[email protected]>
Cc: Brett Rudley <[email protected]>
Cc: Arend van Spriel <[email protected]>
Cc: Franky (Zhenhui) Lin <[email protected]>
Cc: Hante Meuleman <[email protected]>
Cc: [email protected]
Signed-off-by: John W. Linville <[email protected]>
---
Did this one get lost?
V2 - fixed two patch errors.
V3 - address comments from Arend (linville)
drivers/net/wireless/brcm80211/brcmsmac/dma.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/dma.c b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
index 1860c57..4fb9635 100644
--- a/drivers/net/wireless/brcm80211/brcmsmac/dma.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
@@ -1015,9 +1015,10 @@ static bool dma64_txidle(struct dma_info *di)
/*
* post receive buffers
- * return false is refill failed completely and ring is empty this will stall
- * the rx dma and user might want to call rxfill again asap. This unlikely
- * happens on memory-rich NIC, but often on memory-constrained dongle
+ * Return false if refill failed completely or dma mapping failed. The ring
+ * is empty, which will stall the rx dma and user might want to call rxfill
+ * again asap. This is unlikely to happen on a memory-rich NIC, but often on
+ * memory-constrained dongle.
*/
bool dma_rxfill(struct dma_pub *pub)
{
@@ -1078,6 +1079,8 @@ bool dma_rxfill(struct dma_pub *pub)
pa = dma_map_single(di->dmadev, p->data, di->rxbufsize,
DMA_FROM_DEVICE);
+ if (dma_mapping_error(di->dmadev, pa))
+ return false;
/* save the free packet pointer */
di->rxp[rxout] = p;
@@ -1284,7 +1287,11 @@ static void dma_txenq(struct dma_info *di, struct sk_buff *p)
/* get physical address of buffer start */
pa = dma_map_single(di->dmadev, data, len, DMA_TO_DEVICE);
-
+ /* if mapping failed, free skb */
+ if (dma_mapping_error(di->dmadev, pa)) {
+ brcmu_pkt_buf_free_skb(p);
+ return;
+ }
/* With a DMA segment list, Descriptor table is filled
* using the segment list instead of looping over
* buffers in multi-chain DMA. Therefore, EOF for SGLIST
--
1.8.1.4
On 08/09/13 19:36, John W. Linville wrote:
> From: "John W. Linville"<[email protected]>
>
> The driver fails to check the results of DMA mapping in twp places,
> which results in the following warning:
>
> [ 28.078515] ------------[ cut here ]------------
> [ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
> [ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver failed to check map error[device address=0x00000000b5d60d6c] [size=1876 bytes] [mapped as
> single]
> [ 28.078536] Modules linked in: bnep bluetooth vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu rtl8192c_common rtlwifi mac802
> 11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer snd_seq_device snd k8temp
> cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4 jbd2 mbcache crc1
> 6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic pata_amd
> [ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O 3.10.0-rc7-wl+ #42
> [ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700 Notebook PC/30D6, BIOS F.27 11/27/2008
> [ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898 ffff8800bbb03b18
> [ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480 ffff8800b7b9c010
> [ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754 ffff8800bbb03b78
> [ 28.078622] Call Trace:
> [ 28.078624]<IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
> [ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
> [ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
> [ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
> [ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
> [ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
> [ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
> [ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
> [ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
> [ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
> [ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
> --snip--
> [ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
> [ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
> [ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
> [ 28.078984] Mapped at:
> [ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
> [ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
> [ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
> [ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
> [ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
>
> As the patch adds a new failure mechanism to dma_rxfill(). When I changed the
> comment at the start of the routine to add that information, I also polished
> the wording.
>
> Signed-off-by: Larry Finger<[email protected]>
> Cc: Stable<[email protected]>
> Cc: Brett Rudley<[email protected]>
> Cc: Arend van Spriel<[email protected]>
You can change this one into an Acked-by: (if you want).
Regards,
Arend
> Cc: Franky (Zhenhui) Lin<[email protected]>
> Cc: Hante Meuleman<[email protected]>
> Cc: [email protected]
> Signed-off-by: John W. Linville<[email protected]>
> ---
> Did this one get lost?
>
> V2 - fixed two patch errors.
> V3 - address comments from Arend (linville)
>
> drivers/net/wireless/brcm80211/brcmsmac/dma.c | 15 +++++++++++----
> 1 file changed, 11 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/wireless/brcm80211/brcmsmac/dma.c b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
> index 1860c57..4fb9635 100644
> --- a/drivers/net/wireless/brcm80211/brcmsmac/dma.c
> +++ b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
> @@ -1015,9 +1015,10 @@ static bool dma64_txidle(struct dma_info *di)
>
> /*
> * post receive buffers
> - * return false is refill failed completely and ring is empty this will stall
> - * the rx dma and user might want to call rxfill again asap. This unlikely
> - * happens on memory-rich NIC, but often on memory-constrained dongle
> + * Return false if refill failed completely or dma mapping failed. The ring
> + * is empty, which will stall the rx dma and user might want to call rxfill
> + * again asap. This is unlikely to happen on a memory-rich NIC, but often on
> + * memory-constrained dongle.
> */
> bool dma_rxfill(struct dma_pub *pub)
> {
> @@ -1078,6 +1079,8 @@ bool dma_rxfill(struct dma_pub *pub)
>
> pa = dma_map_single(di->dmadev, p->data, di->rxbufsize,
> DMA_FROM_DEVICE);
> + if (dma_mapping_error(di->dmadev, pa))
> + return false;
>
> /* save the free packet pointer */
> di->rxp[rxout] = p;
> @@ -1284,7 +1287,11 @@ static void dma_txenq(struct dma_info *di, struct sk_buff *p)
>
> /* get physical address of buffer start */
> pa = dma_map_single(di->dmadev, data, len, DMA_TO_DEVICE);
> -
> + /* if mapping failed, free skb */
> + if (dma_mapping_error(di->dmadev, pa)) {
> + brcmu_pkt_buf_free_skb(p);
> + return;
> + }
> /* With a DMA segment list, Descriptor table is filled
> * using the segment list instead of looping over
> * buffers in multi-chain DMA. Therefore, EOF for SGLIST
On 08/10/13 00:05, Larry Finger wrote:
> On 08/09/2013 12:36 PM, John W. Linville wrote:
>> From: "John W. Linville" <[email protected]>
>>
>> The driver fails to check the results of DMA mapping in twp places,
>> which results in the following warning:
>>
>> [ 28.078515] ------------[ cut here ]------------
>> [ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
>> [ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver
>> failed to check map error[device address=0x00000000b5d60d6c]
>> [size=1876 bytes] [mapped as
>> single]
>> [ 28.078536] Modules linked in: bnep bluetooth vboxpci(O)
>> vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu
>> rtl8192c_common rtlwifi mac802
>> 11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel
>> kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer
>> snd_seq_device snd k8temp
>> cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore
>> cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4
>> jbd2 mbcache crc1
>> 6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh
>> ata_generic pata_amd
>> [ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O
>> 3.10.0-rc7-wl+ #42
>> [ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700
>> Notebook PC/30D6, BIOS F.27 11/27/2008
>> [ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898
>> ffff8800bbb03b18
>> [ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480
>> ffff8800b7b9c010
>> [ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754
>> ffff8800bbb03b78
>> [ 28.078622] Call Trace:
>> [ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
>> [ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
>> [ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
>> [ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
>> [ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
>> [ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
>> [ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
>> [ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
>> [ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
>> [ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
>> [ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
>> --snip--
>> [ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
>> [ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
>> [ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
>> [ 28.078984] Mapped at:
>> [ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
>> [ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
>> [ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
>> [ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
>> [ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
>>
>> As the patch adds a new failure mechanism to dma_rxfill(). When I
>> changed the
>> comment at the start of the routine to add that information, I also
>> polished
>> the wording.
>>
>> Signed-off-by: Larry Finger <[email protected]>
>> Cc: Stable <[email protected]>
>> Cc: Brett Rudley <[email protected]>
>> Cc: Arend van Spriel <[email protected]>
>> Cc: Franky (Zhenhui) Lin <[email protected]>
>> Cc: Hante Meuleman <[email protected]>
>> Cc: [email protected]
>> Signed-off-by: John W. Linville <[email protected]>
>> ---
>> Did this one get lost?
>>
>> V2 - fixed two patch errors.
>> V3 - address comments from Arend (linville)
>>
>
> For some reason, I never got the mail containing Arend's comments, and I
> forgot about it. If John's V3 fixes take care of them, then it should be
> pushed.
Weird as I resend the comments. Do you have me on a blacklist ;-)
Regards,
Arend
> Larry
>
>
>
On 08/09/2013 12:36 PM, John W. Linville wrote:
> From: "John W. Linville" <[email protected]>
>
> The driver fails to check the results of DMA mapping in twp places,
> which results in the following warning:
>
> [ 28.078515] ------------[ cut here ]------------
> [ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930()
> [ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver failed to check map error[device address=0x00000000b5d60d6c] [size=1876 bytes] [mapped as
> single]
> [ 28.078536] Modules linked in: bnep bluetooth vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu rtl8192c_common rtlwifi mac802
> 11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer snd_seq_device snd k8temp
> cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4 jbd2 mbcache crc1
> 6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic pata_amd
> [ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O 3.10.0-rc7-wl+ #42
> [ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700 Notebook PC/30D6, BIOS F.27 11/27/2008
> [ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898 ffff8800bbb03b18
> [ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480 ffff8800b7b9c010
> [ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754 ffff8800bbb03b78
> [ 28.078622] Call Trace:
> [ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b
> [ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0
> [ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50
> [ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930
> [ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70
> [ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac]
> [ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac]
> [ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac]
> [ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac]
> [ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac]
> [ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0
> --snip--
> [ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20
> [ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2
> [ 28.078982] ---[ end trace 6164d1a08148e9c8 ]---
> [ 28.078984] Mapped at:
> [ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150
> [ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac]
> [ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac]
> [ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac]
> [ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac]
>
> As the patch adds a new failure mechanism to dma_rxfill(). When I changed the
> comment at the start of the routine to add that information, I also polished
> the wording.
>
> Signed-off-by: Larry Finger <[email protected]>
> Cc: Stable <[email protected]>
> Cc: Brett Rudley <[email protected]>
> Cc: Arend van Spriel <[email protected]>
> Cc: Franky (Zhenhui) Lin <[email protected]>
> Cc: Hante Meuleman <[email protected]>
> Cc: [email protected]
> Signed-off-by: John W. Linville <[email protected]>
> ---
> Did this one get lost?
>
> V2 - fixed two patch errors.
> V3 - address comments from Arend (linville)
>
For some reason, I never got the mail containing Arend's comments, and I forgot
about it. If John's V3 fixes take care of them, then it should be pushed.
Larry