From 51e65257142a87fe46a1ce5c35c86c5baf012614 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Wed, 8 Jun 2011 15:26:31 +0200 Subject: iwlegacy: fix channel switch locking We use priv->mutex to avoid race conditions between chswitch_done() and mac_channel_switch(), when marking channel switch in progress. But chswitch_done() can be called in atomic context from rx_csa() or with mutex already taken from commit_rxon(). To fix remove mutex from chswitch_done() and use atomic bitops for marking channel switch pending. Cc: stable@kernel.org # 2.6.39+ Signed-off-by: Stanislaw Gruszka Signed-off-by: John W. Linville --- drivers/net/wireless/iwlegacy/iwl-dev.h | 13 +------------ 1 file changed, 1 insertion(+), 12 deletions(-) (limited to 'drivers/net/wireless/iwlegacy/iwl-dev.h') diff --git a/drivers/net/wireless/iwlegacy/iwl-dev.h b/drivers/net/wireless/iwlegacy/iwl-dev.h index be0106c6a2da..ea30122669ee 100644 --- a/drivers/net/wireless/iwlegacy/iwl-dev.h +++ b/drivers/net/wireless/iwlegacy/iwl-dev.h @@ -854,17 +854,6 @@ struct traffic_stats { #endif }; -/* - * iwl_switch_rxon: "channel switch" structure - * - * @ switch_in_progress: channel switch in progress - * @ channel: new channel - */ -struct iwl_switch_rxon { - bool switch_in_progress; - __le16 channel; -}; - /* * schedule the timer to wake up every UCODE_TRACE_PERIOD milliseconds * to perform continuous uCode event logging operation if enabled @@ -1115,7 +1104,7 @@ struct iwl_priv { struct iwl_rxon_context contexts[NUM_IWL_RXON_CTX]; - struct iwl_switch_rxon switch_rxon; + __le16 switch_channel; /* 1st responses from initialize and runtime uCode images. * _4965's initialize alive response contains some calibration data. */ -- cgit v1.2.3