Re: [PATCH -next v2] xhci: fix two places when dealing with return value of function xhci_check_args

[谢泓宇]

Hi,

On 2022/2/9 17:29, Mathias Nyman wrote:
> On 9.2.2022 4.52, Hongyu Xie wrote:
> > From: Hongyu Xie <xiehongyu1@xxxxxxxxxx>
> >
> > 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@xxxxxxxxxxxxxxx
> > Signed-off-by: Hongyu Xie <xiehongyu1@xxxxxxxxxx>
> > ---
> 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