netdev - Re: [PATCH net v2 3/4] bnxt_en: Fix wrong return value check in bnxt_close

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Date: Thu, 7 Dec 2023 10:27:18 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Michael Chan <michael.chan@...adcom.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
 pabeni@...hat.com, gospo@...adcom.com, Kalesh AP
 <kalesh-anakkur.purayil@...adcom.com>, Vikas Gupta
 <vikas.gupta@...adcom.com>, Somnath Kotur <somnath.kotur@...adcom.com>
Subject: Re: [PATCH net v2 3/4] bnxt_en: Fix wrong return value check in
 bnxt_close_nic()

On Wed,  6 Dec 2023 16:05:50 -0800 Michael Chan wrote:
> The wait_event_interruptible_timeout() function returns 0
> if the timeout elapsed, -ERESTARTSYS if it was interrupted
> by a signal, and the remaining jiffies otherwise if the
> condition evaluated to true before the timeout elapsed.
> 
> Driver should have checked for zero return value instead of
> a positive value.

Not sure how this was not caught earlier, maybe there is a more
complicated story behind it. Otherwise you should handle -ERESTARTSYS
as well.