From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Date: Sun, 6 Apr 2014 18:37:44 +0000 (+0200)
Subject: net/at91_ether: avoid NULL pointer dereference
X-Git-Tag: v3.15-rc1~47^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c293fb785bdda64d88f197e6758a3c16ae83e569;p=pandora-kernel.git

net/at91_ether: avoid NULL pointer dereference

The at91_ether driver calls macb_mii_init passing a 'struct macb'
structure whose tx_clk member is initialized to 0. However,
macb_handle_link_change() expects tx_clk to be the result of
a call to clk_get, and so IS_ERR(tx_clk) to be true if the clock
is invalid. This causes an oops when booting Linux 3.14 on the
csb637 board. The following changes avoids this.

Signed-off-by: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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