netdev - macb: inconsistent Rx descriptor chain after OOM

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Date:   Mon, 16 Sep 2019 09:41:26 +0200
From:   Andreas Schwab <schwab@...e.de>
To:     Nicolas Ferre <nicolas.ferre@...rochip.com>
CC:     netdev@...r.kernel.org
Subject: macb: inconsistent Rx descriptor chain after OOM

When there is an OOM situation, the macb driver cannot recover from it:

[245622.872993] macb 10090000.ethernet eth0: Unable to allocate sk_buff
[245622.891438] macb 10090000.ethernet eth0: inconsistent Rx descriptor chain

After that, the interface is dead.  Since this system is using NFS root,
it then stalled as a whole.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@...e.de
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