From e89f7690a3adbde0af7c294f83c242ba6a367ef0 Mon Sep 17 00:00:00 2001 From: Larry Finger Date: Fri, 6 Apr 2012 16:54:17 -0500 Subject: 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 Signed-off-by: John W. Linville --- drivers/net/wireless/rtlwifi/base.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) 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 @@ void rtl_get_tcb_desc(struct ieee80211_hw *hw, __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)) { /* -- cgit v1.1