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

index a658b4b..182e598 100644 (file)
@@ -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.
         */