From 75459e3338928bdbe9618b626a6471764e2e53f0 Mon Sep 17 00:00:00 2001
From: Kalle Valo <kvalo@qca.qualcomm.com>
Date: Thu, 13 Feb 2014 18:13:12 +0200
Subject: [PATCH] ath10k: release conf_mutex if vdev_start() fails

I modified Michal's commit c930f744bdb0 ("ath10k: implement channel switching") to return
when vdev_start() fails, but forgot to release conf_mutex.

Found by coccinelle:

>> drivers/net/wireless/ath/ath10k/mac.c:2745:5-11: preceding lock on line 2663

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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