dma_unmap_sg() is being called twice after completing the
task. Looks like this is a copy paste error when creating
des driver.
With this the following warn appears during boot:
[ 4.210457] ------------[ cut here ]------------
[ 4.215114] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:1080 check_unmap+0x710/0x9a0()
[ 4.222899] omap-des 480a5000.des: DMA-API: device driver tries to free DMA memory it has not allocated [device address=0x00000000ab2ce000] [size=8 bytes]
[ 4.236785] Modules linked in:
[ 4.239860] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.14.39-02999-g1bc045a-dirty #182
[ 4.247918] [<c001678c>] (unwind_backtrace) from [<c0012574>] (show_stack+0x10/0x14)
[ 4.255710] [<c0012574>] (show_stack) from [<c05a37e8>] (dump_stack+0x84/0xb8)
[ 4.262977] [<c05a37e8>] (dump_stack) from [<c0046464>] (warn_slowpath_common+0x68/0x8c)
[ 4.271107] [<c0046464>] (warn_slowpath_common) from [<c004651c>] (warn_slowpath_fmt+0x30/0x40)
[ 4.279854] [<c004651c>] (warn_slowpath_fmt) from [<c02d50a4>] (check_unmap+0x710/0x9a0)
[ 4.287991] [<c02d50a4>] (check_unmap) from [<c02d5478>] (debug_dma_unmap_sg+0x90/0x19c)
[ 4.296128] [<c02d5478>] (debug_dma_unmap_sg) from [<c04a77d8>] (omap_des_done_task+0x1cc/0x3e4)
[ 4.304963] [<c04a77d8>] (omap_des_done_task) from [<c004a090>] (tasklet_action+0x84/0x124)
[ 4.313370] [<c004a090>] (tasklet_action) from [<c004a4ac>] (__do_softirq+0xf0/0x20c)
[ 4.321235] [<c004a4ac>] (__do_softirq) from [<c004a840>] (irq_exit+0x98/0xec)
[ 4.328500] [<c004a840>] (irq_exit) from [<c000f9ac>] (handle_IRQ+0x50/0xb0)
[ 4.335589] [<c000f9ac>] (handle_IRQ) from [<c0008688>] (gic_handle_irq+0x28/0x5c)
Removing the duplicate call to dma_unmap_sg().
Reported-by: Tomi Valkeinen <[email protected]>
Signed-off-by: Lokesh Vutla <[email protected]>
---
drivers/crypto/omap-des.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c
index 4630709..0a70e46 100644
--- a/drivers/crypto/omap-des.c
+++ b/drivers/crypto/omap-des.c
@@ -536,9 +536,6 @@ static int omap_des_crypt_dma_stop(struct omap_des_dev *dd)
dmaengine_terminate_all(dd->dma_lch_in);
dmaengine_terminate_all(dd->dma_lch_out);
- dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
- dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, DMA_FROM_DEVICE);
-
return err;
}
--
1.9.1
On Thu, Jul 02, 2015 at 06:33:28PM +0530, Lokesh Vutla wrote:
> dma_unmap_sg() is being called twice after completing the
> task. Looks like this is a copy paste error when creating
> des driver.
> With this the following warn appears during boot:
>
> [ 4.210457] ------------[ cut here ]------------
> [ 4.215114] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:1080 check_unmap+0x710/0x9a0()
> [ 4.222899] omap-des 480a5000.des: DMA-API: device driver tries to free DMA memory it has not allocated [device address=0x00000000ab2ce000] [size=8 bytes]
> [ 4.236785] Modules linked in:
> [ 4.239860] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.14.39-02999-g1bc045a-dirty #182
> [ 4.247918] [<c001678c>] (unwind_backtrace) from [<c0012574>] (show_stack+0x10/0x14)
> [ 4.255710] [<c0012574>] (show_stack) from [<c05a37e8>] (dump_stack+0x84/0xb8)
> [ 4.262977] [<c05a37e8>] (dump_stack) from [<c0046464>] (warn_slowpath_common+0x68/0x8c)
> [ 4.271107] [<c0046464>] (warn_slowpath_common) from [<c004651c>] (warn_slowpath_fmt+0x30/0x40)
> [ 4.279854] [<c004651c>] (warn_slowpath_fmt) from [<c02d50a4>] (check_unmap+0x710/0x9a0)
> [ 4.287991] [<c02d50a4>] (check_unmap) from [<c02d5478>] (debug_dma_unmap_sg+0x90/0x19c)
> [ 4.296128] [<c02d5478>] (debug_dma_unmap_sg) from [<c04a77d8>] (omap_des_done_task+0x1cc/0x3e4)
> [ 4.304963] [<c04a77d8>] (omap_des_done_task) from [<c004a090>] (tasklet_action+0x84/0x124)
> [ 4.313370] [<c004a090>] (tasklet_action) from [<c004a4ac>] (__do_softirq+0xf0/0x20c)
> [ 4.321235] [<c004a4ac>] (__do_softirq) from [<c004a840>] (irq_exit+0x98/0xec)
> [ 4.328500] [<c004a840>] (irq_exit) from [<c000f9ac>] (handle_IRQ+0x50/0xb0)
> [ 4.335589] [<c000f9ac>] (handle_IRQ) from [<c0008688>] (gic_handle_irq+0x28/0x5c)
>
> Removing the duplicate call to dma_unmap_sg().
>
> Reported-by: Tomi Valkeinen <[email protected]>
> Signed-off-by: Lokesh Vutla <[email protected]>
Applied to crypto.
--
Email: Herbert Xu <[email protected]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt