From 53216d6a9a2dd3b0a65203e540b7739c36351d55 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Sat, 16 Mar 2013 19:19:29 +0100 Subject: [PATCH] rt2800: do not crash if spec->channels is NULL In case the spec->channels was not specified, print warning instead of hard crash the kernel. Signed-off-by: Stanislaw Gruszka Tested-by: Wanlong Gao Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2800lib.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index a658b4bc7da2..182e598017ec 100644 --- 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. */ -- 2.20.1