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rt2800: do not crash if spec->channels is NULL
authorStanislaw Gruszka <stf_xl@wp.pl>
Sat, 16 Mar 2013 18:19:29 +0000 (19:19 +0100)
committerJohn W. Linville <linville@tuxdriver.com>
Mon, 18 Mar 2013 20:38:29 +0000 (16:38 -0400)
In case the spec->channels was not specified, print warning instead
of hard crash the kernel.

Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Tested-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/rt2x00/rt2800lib.c patch | blob | blame | history

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index a658b4bc7da2fea78f2160b97907f20d547abde5..182e598017ec221bb5fac9a6c1ff422cbd52e17e 100644 (file)
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -5213,6 +5213,9 @@ static int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
                spec->channels = rf_vals_3x;
        }
 
+       if (WARN_ON_ONCE(!spec->channels))
+               return -ENODEV;
+
        /*
         * Initialize HT information.
         */