netdev - Re: [PATCH net-next 1/2] i40e: Add helper for VF inited state check with timeout

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20230712103136.1a85eb91@kernel.org>
Date: Wed, 12 Jul 2023 10:31:36 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Ivan Vecera <ivecera@...hat.com>
Cc: Leon Romanovsky <leon@...nel.org>, Tony Nguyen
 <anthony.l.nguyen@...el.com>, davem@...emloft.net, pabeni@...hat.com,
 edumazet@...gle.com, netdev@...r.kernel.org, Ma Yuying <yuma@...hat.com>,
 Simon Horman <simon.horman@...igine.com>, Rafal Romanowski
 <rafal.romanowski@...el.com>
Subject: Re: [PATCH net-next 1/2] i40e: Add helper for VF inited state check
 with timeout

On Wed, 12 Jul 2023 15:18:29 +0200 Ivan Vecera wrote:
> > This error is not accurate in the edge case, when VF state changed to
> > be INIT during msleep() while i was 14.
> > 
> > Thanks  
> 
> Would you like to add an extra check after the cycle or just increase 
> limit from 15 to 16 (there will be an extra msleep)...

15 or 16 is of lesser importance, the bigger irritant is that the last
sleep is no pointless. I'd move the condition check into the middle of
the loop:

for (i = 0;; i++) {
	if (test())
		return GOOD;

	if (i >= 15)
		return BAD;

	take_a_nap();
}