diff mbox series

[V2] usbcore: Select only first configuration for non-UAC3 compliant devices

Message ID 1546709942-28634-1-git-send-email-saranya.gopal@intel.com (mailing list archive)
State Superseded
Commit ff2a8c532c14fd22fb26a36574d9ff199afbbe54
Headers show
Series [V2] usbcore: Select only first configuration for non-UAC3 compliant devices | expand

Commit Message

Gopal, Saranya Jan. 5, 2019, 5:39 p.m. UTC 
From: Saranya Gopal <saranya.gopal@intel.com>

In most of the UAC1 and UAC2 audio devices, the first
configuration is most often the best configuration.
However, with recent patch to support UAC3 configuration,
second configuration was unintentionally chosen for
some of the UAC1/2 devices that had more than one
configuration. This was because of the existing check
after the audio config check which selected any config
which had a non-vendor class. This patch fixes this issue.

Fixes: f13912d3f014 ("usbcore: Select UAC3 configuration for audio if present")
Reported-by: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Saranya Gopal <saranya.gopal@intel.com>
---
Changes from V1: Added full commit name and more SHA1 numbers in Fixes tag

 drivers/usb/core/generic.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

Comments

Con Kolivas Jan. 5, 2019, 10:02 p.m. UTC | #1 
Hi Saranya

On Sun, 6 Jan 2019 at 04:41, <saranya.gopal@intel.com> wrote:
>
> From: Saranya Gopal <saranya.gopal@intel.com>
>
> In most of the UAC1 and UAC2 audio devices, the first
> configuration is most often the best configuration.
> However, with recent patch to support UAC3 configuration,
> second configuration was unintentionally chosen for
> some of the UAC1/2 devices that had more than one
> configuration. This was because of the existing check
> after the audio config check which selected any config
> which had a non-vendor class. This patch fixes this issue.
>
> Fixes: f13912d3f014 ("usbcore: Select UAC3 configuration for audio if present")
> Reported-by: Con Kolivas <kernel@kolivas.org>
> Signed-off-by: Saranya Gopal <saranya.gopal@intel.com>>

I can confirm the above patch fixes my problem.
Tested-by: Con Kolivas <kernel@kolivas.org>

Thanks!
Con
diff mbox series

Patch

diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
index 356b05c..f713cec 100644
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -143,9 +143,12 @@  int usb_choose_configuration(struct usb_device *udev)
 			continue;
 		}
 
-		if (i > 0 && desc && is_audio(desc) && is_uac3_config(desc)) {
-			best = c;
-			break;
+		if (i > 0 && desc && is_audio(desc)) {
+			if (is_uac3_config(desc)) {
+				best = c;
+				break;
+			}
+			continue;
 		}
 
 		/* From the remaining configs, choose the first one whose