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

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

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/media/IR/ir-sysfs.c b/drivers/media/IR/ir-sysfs.c
index a96738135bb0..d73589ad55e6 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);