From: Mauro Carvalho Chehab <mchehab@redhat.com>
Date: Mon, 14 Dec 2009 05:56:15 +0000 (-0300)
Subject: V4L/DVB (13639): ir-sysfs: Properly protect rc_tab changes with a lock
X-Git-Tag: v2.6.34-rc1~280^2~355
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eecee32ac2c4b00b76cc8d99fd8d2b9fd54a283d;p=platform%2Fkernel%2Flinux-3.10.git

V4L/DVB (13639): ir-sysfs: Properly protect rc_tab changes with a lock

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/IR/ir-sysfs.c b/drivers/media/IR/ir-sysfs.c
index a967381..d73589a 100644
--- a/drivers/media/IR/ir-sysfs.c
+++ b/drivers/media/IR/ir-sysfs.c
@@ -79,6 +79,7 @@ static ssize_t store_protocol(struct device *d,
 	struct ir_input_dev *ir_dev = dev_get_drvdata(d);
 	enum ir_type ir_type = IR_TYPE_UNKNOWN;
 	int rc = -EINVAL;
+	unsigned long flags;
 	char *buf;
 
 	buf = strsep((char **) &data, "\n");
@@ -104,7 +105,9 @@ static ssize_t store_protocol(struct device *d,
 		return -EINVAL;
 	}
 
+	spin_lock_irqsave(&ir_dev->rc_tab.lock, flags);
 	ir_dev->rc_tab.ir_type = ir_type;
+	spin_unlock_irqrestore(&ir_dev->rc_tab.lock, flags);
 
 	IR_dprintk(1, "Current protocol is %ld\n", ir_type);