rtlwifi: Fix oops on rate-control failure
When the rate-control indexing is incorrectly set up, mac80211 issues
a warning and returns NULL from the call to ieee80211_get_tx_rate().
When this happens, avoid a NULL pointer dereference.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rtlwifi/base.c b/drivers/net/wireless/rtlwifi/base.c
index 5100235..e54488d 100644
--- a/drivers/net/wireless/rtlwifi/base.c
+++ b/drivers/net/wireless/rtlwifi/base.c
@@ -838,7 +838,10 @@
__le16 fc = hdr->frame_control;
txrate = ieee80211_get_tx_rate(hw, info);
- tcb_desc->hw_rate = txrate->hw_value;
+ if (txrate)
+ tcb_desc->hw_rate = txrate->hw_value;
+ else
+ tcb_desc->hw_rate = 0;
if (ieee80211_is_data(fc)) {
/*