This is a note to let you know that I've just added the patch titled
drm/udl: Unregister device before cleaning up on disconnect
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-udl-unregister-device-before-cleaning-up-on-disconnect.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From ff9cb6d2035c586ea7c8f1754d4409eec7a2d26d Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <[email protected]>
Date: Mon, 3 Mar 2025 15:52:56 +0100
Subject: drm/udl: Unregister device before cleaning up on disconnect
From: Thomas Zimmermann <[email protected]>
commit ff9cb6d2035c586ea7c8f1754d4409eec7a2d26d upstream.
Disconnecting a DisplayLink device results in the following kernel
error messages
[ 93.041748] [drm:udl_urb_completion [udl]] *ERROR* udl_urb_completion -
nonzero write bulk status received: -115
[ 93.055299] [drm:udl_submit_urb [udl]] *ERROR* usb_submit_urb error fffffffe
[ 93.065363] [drm:udl_urb_completion [udl]] *ERROR* udl_urb_completion -
nonzero write bulk status received: -115
[ 93.078207] [drm:udl_submit_urb [udl]] *ERROR* usb_submit_urb error fffffffe
coming from KMS poll helpers. Shutting down poll helpers runs them
one final time when the USB device is already gone.
Run drm_dev_unplug() first in udl's USB disconnect handler. Udl's
polling code already handles disconnects gracefully if the device has
been marked as unplugged.
Signed-off-by: Thomas Zimmermann <[email protected]>
Fixes: b1a981bd5576 ("drm/udl: drop drm_driver.release hook")
Cc: [email protected]
Cc: <[email protected]> # v5.8+
Reviewed-by: Patrik Jakobsson <[email protected]>
Link:
https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/udl/udl_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/udl/udl_drv.c
+++ b/drivers/gpu/drm/udl/udl_drv.c
@@ -115,9 +115,9 @@ static void udl_usb_disconnect(struct us
{
struct drm_device *dev = usb_get_intfdata(interface);
+ drm_dev_unplug(dev);
drm_kms_helper_poll_fini(dev);
udl_drop_usb(dev);
- drm_dev_unplug(dev);
}
/*
Patches currently in stable-queue which might be from [email protected] are
queue-5.10/drm-udl-unregister-device-before-cleaning-up-on-disconnect.patch
