netdev - [PATCH v1 34/49] wireless: ath: carl9170: prepare for enabling irq in complete()

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Date:	Sun, 18 Aug 2013 00:24:59 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-usb@...r.kernel.org, Oliver Neukum <oliver@...kum.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Ming Lei <ming.lei@...onical.com>,
	Christian Lamparter <chunkeey@...glemail.com>,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH v1 34/49] wireless: ath: carl9170: prepare for enabling irq in complete()

Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().

Cc: Christian Lamparter <chunkeey@...glemail.com>
Cc: "John W. Linville" <linville@...driver.com>
Cc: linux-wireless@...r.kernel.org
Cc: netdev@...r.kernel.org
Signed-off-by: Ming Lei <ming.lei@...onical.com>
---
 drivers/net/wireless/ath/carl9170/rx.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/carl9170/rx.c b/drivers/net/wireless/ath/carl9170/rx.c
index 4684dd9..61f62a6 100644
--- a/drivers/net/wireless/ath/carl9170/rx.c
+++ b/drivers/net/wireless/ath/carl9170/rx.c
@@ -129,6 +129,7 @@ static int carl9170_check_sequence(struct ar9170 *ar, unsigned int seq)
 
 static void carl9170_cmd_callback(struct ar9170 *ar, u32 len, void *buffer)
 {
+	unsigned long flags;
 	/*
 	 * Some commands may have a variable response length
 	 * and we cannot predict the correct length in advance.
@@ -148,7 +149,7 @@ static void carl9170_cmd_callback(struct ar9170 *ar, u32 len, void *buffer)
 		carl9170_restart(ar, CARL9170_RR_INVALID_RSP);
 	}
 
-	spin_lock(&ar->cmd_lock);
+	spin_lock_irqsave(&ar->cmd_lock, flags);
 	if (ar->readbuf) {
 		if (len >= 4)
 			memcpy(ar->readbuf, buffer + 4, len - 4);
@@ -156,7 +157,7 @@ static void carl9170_cmd_callback(struct ar9170 *ar, u32 len, void *buffer)
 		ar->readbuf = NULL;
 	}
 	complete(&ar->cmd_wait);
-	spin_unlock(&ar->cmd_lock);
+	spin_unlock_irqrestore(&ar->cmd_lock, flags);
 }
 
 void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len)
-- 
1.7.9.5

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