linux-kernel - [PATCH v2 4/7] [media] rc-ir-raw: do not generate any receiving thread for raw transmitters

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Date:   Fri, 02 Sep 2016 02:16:26 +0900
From:   Andi Shyti <andi.shyti@...sung.com>
To:     Mauro Carvalho Chehab <mchehab@....samsung.com>,
        Sean Young <sean@...s.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Andi Shyti <andi.shyti@...sung.com>,
        Andi Shyti <andi@...zian.org>
Subject: [PATCH v2 4/7] [media] rc-ir-raw: do not generate any receiving thread
 for raw transmitters

Raw IR transmitters do not need any thread listening for
occurring events. Check the driver type before running the
thread.

Signed-off-by: Andi Shyti <andi.shyti@...sung.com>
---
 drivers/media/rc/rc-ir-raw.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/media/rc/rc-ir-raw.c b/drivers/media/rc/rc-ir-raw.c
index 144304c..64ddc3d 100644
--- a/drivers/media/rc/rc-ir-raw.c
+++ b/drivers/media/rc/rc-ir-raw.c
@@ -274,12 +274,19 @@ int ir_raw_event_register(struct rc_dev *dev)
 	INIT_KFIFO(dev->raw->kfifo);
 
 	spin_lock_init(&dev->raw->lock);
-	dev->raw->thread = kthread_run(ir_raw_event_thread, dev->raw,
-				       "rc%u", dev->minor);
 
-	if (IS_ERR(dev->raw->thread)) {
-		rc = PTR_ERR(dev->raw->thread);
-		goto out;
+	/*
+	 * raw transmitters do not need any event registration
+	 * because the event is coming from userspace
+	 */
+	if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
+		dev->raw->thread = kthread_run(ir_raw_event_thread, dev->raw,
+					       "rc%u", dev->minor);
+
+		if (IS_ERR(dev->raw->thread)) {
+			rc = PTR_ERR(dev->raw->thread);
+			goto out;
+		}
 	}
 
 	mutex_lock(&ir_raw_handler_lock);
-- 
2.9.3