Re: [PATCH] ALSA: usb-audio: check urb before kill it

Similar to commit<124751d5e>, there should be a check for urb before kill it.

I suggest to reconsider this change description. How does it fit to the information “may be NULL” from the function documentation? https://elixir.bootlin.com/linux/v5.10.3/source/drivers/usb/core/urb.c#L677

Regards, Markus