Re: [PATCH] usb: storage: bound timeout=0 URB waits to 30s

[Oliver Neukum]

On 14.10.26 11:38, Hongyu Xie wrote:

> A blanket bound for this helper was suggested before [1] but dropped over
> concern that legitimate SCSI commands (format, tape rewind) can exceed
> 60 seconds.  Those commands are issued to tape LUs whose SCSI timeouts
> are much longer than 30s; usb-storage-attached tapes holding back a CSW
> for more than 30 seconds remain the residual false-positive window of
> this change (modern tape bridges use UAS, which is unaffected).

And these concerns are entirely justified.
I am sorry, but there is no uniform timeout suitable for SCSI commands.
If anything hangs based on wrong timeouts, that is the bug to fix.

	Regards
		Oliver