From: Colin Ian King <colin.king@canonical.com>
Date: Tue, 26 Mar 2013 17:35:23 +0000 (+0000)
Subject: iwlegacy: 4965-rs: avoid null pointer dereference error
X-Git-Tag: v3.9-rc6~38^2~18^2^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ace5af39866da7d45f43774150dace19a73716d6;p=pandora-kernel.git

iwlegacy: 4965-rs: avoid null pointer dereference error

il4965_rs_initialize_lq checks to see if sta is null, however, before that
check il4965_rs_use_green dereferences sta when intializing use_green.
Avoid a potential null pointer dereference error by only calling
il4965_rs_use_green after we are sure sta is not null.

Smatch analysis:

drivers/net/wireless/iwlegacy/4965-rs.c:2160 il4965_rs_initialize_lq() warn:
  variable dereferenced before check 'sta' (see line 2155)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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