After upgrading my laptop to kernel 4.12 I found that the firmware for
my WiFi card was no longer loaded, rendering the WiFi non-functional.
In the dmesg are (only) these related lines:
[ 6.854609] rtl8723be: Using firmware rtlwifi/rtl8723befw_36.bin
[ 6.854990] rtl8723be 0000:02:00.0: Direct firmware load for rtlwifi/rtl8723befw_36.bin failed with error -2
[ 6.854993] rtlwifi: Selected firmware is not available
Now, by commit f70e4df2b384d21e36a7c30a591639592692e0ec ("Add code to
read new versions of firmware"), supposedly rtlwifi/rtl8723befw.bin
should be loaded if rtlwifi/rtl8723befw_36.bin is not available, but
that does not actually work.
AFAICS the problem is that request_firmware_nowait() does not wait for
the firmware to show up and returns 0 even if the file is not there, so
the code to load the fallback file will never be reached.
Cheers,
Sven
On 07/29/2017 04:21 AM, Sven Joachim wrote:
> Commit f70e4df2 ("rtlwifi: Add code to read new versions of firmware")
> added code to load an old firmware file if the new one is not
> available. Unfortunately that code is never reached because
> request_firmware_nowait() does not wait for the firmware to show up
> and returns 0 even if the file is not there.
>
> Use the existing fallback mechanism introduced by commit
> 62009b7f ("rtlwifi: rtl8192cu: Add new firmware") instead.
>
> Fixes: f70e4df2b384d21e36a7c30a591639592692e0ec
> Cc: [email protected]
> Signed-off-by: Sven Joachim <[email protected]>
Your solution seems to be correct; however, your patch fails to apply. Make
certain that you have the latest pull on the wireless-drivers-next repo. In
particular, it needs commit f2764f61fa105 by Souptik Jarder, which changed the
error return.
NACK.
Larry
Commit f70e4df2 ("rtlwifi: Add code to read new versions of firmware")
added code to load an old firmware file if the new one is not
available. Unfortunately that code is never reached because
request_firmware_nowait() does not wait for the firmware to show up
and returns 0 even if the file is not there.
Use the existing fallback mechanism introduced by commit
62009b7f ("rtlwifi: rtl8192cu: Add new firmware") instead.
Fixes: f70e4df2b384d21e36a7c30a591639592692e0ec
Cc: [email protected]
Signed-off-by: Sven Joachim <[email protected]>
---
drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c | 13 +++----------
drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c | 13 +++----------
2 files changed, 6 insertions(+), 20 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
index f9d10f1e7cf8..1c2d5f6dd3ff 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
@@ -187,16 +187,8 @@ int rtl8723be_init_sw_vars(struct ieee80211_hw *hw)
rtlpriv->io.dev, GFP_KERNEL, hw,
rtl_fw_cb);
if (err) {
- /* Failed to get firmware. Check if old version available */
- fw_name = "rtlwifi/rtl8723befw.bin";
- pr_info("Using firmware %s\n", fw_name);
- err = request_firmware_nowait(THIS_MODULE, 1, fw_name,
- rtlpriv->io.dev, GFP_KERNEL, hw,
- rtl_fw_cb);
- if (err) {
- pr_err("Failed to request firmware!\n");
- return 1;
- }
+ pr_err("Failed to request firmware!\n");
+ return 1;
}
return 0;
}
@@ -287,6 +279,7 @@ static const struct rtl_hal_cfg rtl8723be_hal_cfg = {
.bar_id = 2,
.write_readback = true,
.name = "rtl8723be_pci",
+ .alt_fw_name = "rtlwifi/rtl8723befw.bin",
.ops = &rtl8723be_hal_ops,
.mod_params = &rtl8723be_mod_params,
.maps[SYS_ISO_CTRL] = REG_SYS_ISO_CTRL,
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c
index d71d2776ca03..0801576bfa89 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c
@@ -214,16 +214,8 @@ int rtl8821ae_init_sw_vars(struct ieee80211_hw *hw)
rtlpriv->io.dev, GFP_KERNEL, hw,
rtl_fw_cb);
if (err) {
- /* Failed to get firmware. Check if old version available */
- fw_name = "rtlwifi/rtl8821aefw.bin";
- pr_info("Using firmware %s\n", fw_name);
- err = request_firmware_nowait(THIS_MODULE, 1, fw_name,
- rtlpriv->io.dev, GFP_KERNEL, hw,
- rtl_fw_cb);
- if (err) {
- pr_err("Failed to request normal firmware!\n");
- return 1;
- }
+ pr_err("Failed to request normal firmware!\n");
+ return 1;
}
/*load wowlan firmware*/
pr_info("Using firmware %s\n", wowlan_fw_name);
@@ -325,6 +317,7 @@ static const struct rtl_hal_cfg rtl8821ae_hal_cfg = {
.bar_id = 2,
.write_readback = true,
.name = "rtl8821ae_pci",
+ .alt_fw_name = "rtlwifi/rtl8821aefw.bin",
.ops = &rtl8821ae_hal_ops,
.mod_params = &rtl8821ae_mod_params,
.maps[SYS_ISO_CTRL] = REG_SYS_ISO_CTRL,
--
2.13.3
Commit f70e4df2b384 ("rtlwifi: Add code to read new versions of
firmware") added code to load an old firmware file if the new one is
not available. Unfortunately that code is never reached because
request_firmware_nowait() does not wait for the firmware to show up
and returns 0 even if the file is not there.
Use the existing fallback mechanism introduced by commit 62009b7f1279
("rtlwifi: rtl8192cu: Add new firmware") instead.
Fixes: f70e4df2b384 ("rtlwifi: Add code to read new versions of firmware")
Cc: [email protected]
Signed-off-by: Sven Joachim <[email protected]>
---
drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c | 17 +++++------------
drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c | 17 +++++------------
2 files changed, 10 insertions(+), 24 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
index 56c05c4e1499..f47d839f388d 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
@@ -187,18 +187,10 @@ int rtl8723be_init_sw_vars(struct ieee80211_hw *hw)
rtlpriv->io.dev, GFP_KERNEL, hw,
rtl_fw_cb);
if (err) {
- /* Failed to get firmware. Check if old version available */
- fw_name = "rtlwifi/rtl8723befw.bin";
- pr_info("Using firmware %s\n", fw_name);
- err = request_firmware_nowait(THIS_MODULE, 1, fw_name,
- rtlpriv->io.dev, GFP_KERNEL, hw,
- rtl_fw_cb);
- if (err) {
- pr_err("Failed to request firmware!\n");
- vfree(rtlpriv->rtlhal.pfirmware);
- rtlpriv->rtlhal.pfirmware = NULL;
- return 1;
- }
+ pr_err("Failed to request firmware!\n");
+ vfree(rtlpriv->rtlhal.pfirmware);
+ rtlpriv->rtlhal.pfirmware = NULL;
+ return 1;
}
return 0;
}
@@ -289,6 +281,7 @@ static const struct rtl_hal_cfg rtl8723be_hal_cfg = {
.bar_id = 2,
.write_readback = true,
.name = "rtl8723be_pci",
+ .alt_fw_name = "rtlwifi/rtl8723befw.bin",
.ops = &rtl8723be_hal_ops,
.mod_params = &rtl8723be_mod_params,
.maps[SYS_ISO_CTRL] = REG_SYS_ISO_CTRL,
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c
index ec2d577ba85b..5925edf7877f 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/sw.c
@@ -216,18 +216,10 @@ int rtl8821ae_init_sw_vars(struct ieee80211_hw *hw)
rtlpriv->io.dev, GFP_KERNEL, hw,
rtl_fw_cb);
if (err) {
- /* Failed to get firmware. Check if old version available */
- fw_name = "rtlwifi/rtl8821aefw.bin";
- pr_info("Using firmware %s\n", fw_name);
- err = request_firmware_nowait(THIS_MODULE, 1, fw_name,
- rtlpriv->io.dev, GFP_KERNEL, hw,
- rtl_fw_cb);
- if (err) {
- pr_err("Failed to request normal firmware!\n");
- vfree(rtlpriv->rtlhal.wowlan_firmware);
- vfree(rtlpriv->rtlhal.pfirmware);
- return 1;
- }
+ pr_err("Failed to request normal firmware!\n");
+ vfree(rtlpriv->rtlhal.wowlan_firmware);
+ vfree(rtlpriv->rtlhal.pfirmware);
+ return 1;
}
/*load wowlan firmware*/
pr_info("Using firmware %s\n", wowlan_fw_name);
@@ -331,6 +323,7 @@ static const struct rtl_hal_cfg rtl8821ae_hal_cfg = {
.bar_id = 2,
.write_readback = true,
.name = "rtl8821ae_pci",
+ .alt_fw_name = "rtlwifi/rtl8821aefw.bin",
.ops = &rtl8821ae_hal_ops,
.mod_params = &rtl8821ae_mod_params,
.maps[SYS_ISO_CTRL] = REG_SYS_ISO_CTRL,
--
2.13.3
Sven Joachim <[email protected]> wrote:
> Commit f70e4df2b384 ("rtlwifi: Add code to read new versions of
> firmware") added code to load an old firmware file if the new one is
> not available. Unfortunately that code is never reached because
> request_firmware_nowait() does not wait for the firmware to show up
> and returns 0 even if the file is not there.
>
> Use the existing fallback mechanism introduced by commit 62009b7f1279
> ("rtlwifi: rtl8192cu: Add new firmware") instead.
>
> Fixes: f70e4df2b384 ("rtlwifi: Add code to read new versions of firmware")
> Cc: [email protected]
> Signed-off-by: Sven Joachim <[email protected]>
Patch applied to wireless-drivers-next.git, thanks.
1d9b168d8ea9 rtlwifi: Fix fallback firmware loading
--
https://patchwork.kernel.org/patch/9872413/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches