On 10.2.2022 3.04, 谢泓宇 wrote:
Hi,
On 2022/2/9 17:29, Mathias Nyman wrote:
On 9.2.2022 4.52, Hongyu Xie wrote:
From: Hongyu Xie xiehongyu1@kylinos.cn
xhci_check_args returns 4 types of value, -ENODEV, -EINVAL, 1 and 0. xhci_urb_enqueue and xhci_check_streams_endpoint return -EINVAL if the return value of xhci_check_args <= 0. This will cause a problem. For example, r8152_submit_rx calling usb_submit_urb in drivers/net/usb/r8152.c. r8152_submit_rx will never get -ENODEV after submiting an urb when xHC is halted, because xhci_urb_enqueue returns -EINVAL in the very beginning.
Fixes: 203a86613fb3 ("xhci: Avoid NULL pointer deref when host dies.") Cc: stable@vger.kernel.org Signed-off-by: Hongyu Xie xiehongyu1@kylinos.cn
Thanks, added to queue. Changed the commit message and header a bit:
"xhci: Prevent futile URB re-submissions due to incorrect return value. The -ENODEV return value from xhci_check_args() is incorrectly changed to -EINVAL in a couple places before propagated further. xhci_check_args() returns 4 types of value, -ENODEV, -EINVAL, 1 and 0. xhci_urb_enqueue and xhci_check_streams_endpoint return -EINVAL if the return value of xhci_check_args <= 0. This causes problems for example r8152_submit_rx, calling usb_submit_urb in drivers/net/usb/r8152.c. r8152_submit_rx will never get -ENODEV after submiting an urb when xHC is halted because xhci_urb_enqueue returns -EINVAL in the very beginning."
Let me know if you disagree with this.
Thanks -Mathias
Sounds good to me.
Do I have to send another patch with commit message and header changed?
Thanks
Hongyu Xie
No need, I'll submit it.
-Mathias