From ccde8a45cbd3ea9a6e785e4393d3a1f6b4e6b495 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Fri, 6 Jan 2012 12:58:16 +0100 Subject: [PATCH] wireless: b43: fix Oops on card eject during transfer An Oops has once been observed, when the SDIO card had been ejected during IO. The PC value shows, that the dev pointer in b43_op_stop() was NULL. (I moved the NULL check before the lock, based upon a suggestion from Julian Calaby . -- JWL) Signed-off-by: Guennadi Liakhovetski Signed-off-by: John W. Linville --- drivers/net/wireless/b43/main.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c index 1c6f19393efa..b91f28ef1032 100644 --- a/drivers/net/wireless/b43/main.c +++ b/drivers/net/wireless/b43/main.c @@ -4852,6 +4852,9 @@ static void b43_op_stop(struct ieee80211_hw *hw) cancel_work_sync(&(wl->beacon_update_trigger)); + if (!dev) + goto out; + mutex_lock(&wl->mutex); if (b43_status(dev) >= B43_STAT_STARTED) { dev = b43_wireless_core_stop(dev); @@ -4863,7 +4866,7 @@ static void b43_op_stop(struct ieee80211_hw *hw) out_unlock: mutex_unlock(&wl->mutex); - +out: cancel_work_sync(&(wl->txpower_adjust_work)); } -- GitLab