Commit ebd0fd2b authored Jul 18, 2012 by Mohammed Shafi Shajakhan Committed by Johannes Berg Jul 18, 2012

cfg80211: Fix mutex locking in reg_last_request_cell_base



should fix the following issue

	[ 3229.815012] [ BUG: lock held when returning to user space! ]
	[ 3229.815016] 3.5.0-rc7-wl #28 Tainted: G        W  O
	[ 3229.815017]
	------------------------------------------------
	[ 3229.815019] wpa_supplicant/5783 is leaving the kernel with locks still held!
	[ 3229.815022] 1 lock held by wpa_supplicant/5783:
	[ 3229.815023]  #0: (reg_mutex){+.+.+.}, at: [<fa65834d>]
	reg_last_request_cell_base+0x1d/0x60 [cfg80211]

Cc: Luis Rodriguez <mcgrof@gmail.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Tested-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

parent 88bc40e8

net/wireless/reg.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -929,11 +929,13 @@ static bool reg_request_cell_base(struct regulatory_request *request)

		bool reg_last_request_cell_base(void)
		{
		bool val;
		assert_cfg80211_lock();

		mutex_lock(&reg_mutex);
		return reg_request_cell_base(last_request);
		val = reg_request_cell_base(last_request);
		mutex_unlock(&reg_mutex);
		return val;
		}

		#ifdef CONFIG_CFG80211_CERTIFICATION_ONUS

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