netdev - Re: 4.3+: Atheros ethernet fails after resume from s2ram, due to order 4 allocation

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Message-ID: <20151126215638.GA22801@electric-eye.fr.zoreil.com>
Date:	Thu, 26 Nov 2015 22:56:39 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Pavel Machek <pavel@....cz>
Cc:	kernel list <linux-kernel@...r.kernel.org>, jcliburn@...il.com,
	chris.snook@...il.com, netdev@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...ysocki.net>, linux-mm@...ck.org,
	nic-devel@...lcomm.com, ronangeles@...il.com,
	ebiederm@...ssion.com, David Miller <davem@...emloft.net>
Subject: Re: 4.3+: Atheros ethernet fails after resume from s2ram, due to
 order 4 allocation

Pavel Machek <pavel@....cz> :
[...]
> Ok, so what went on is easy.. any ideas how to fix it ?

The driver should 1) prohibit holes in its receive ring, 2) allocate before
pushing data up in the stack 3) drop packets when it can't allocate a
fresh buffer and 4) stop releasing receive buffers - and any resource for
that matter - during suspend.

Really.

-- 
Ueimor
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