[media] rc-core: lirc use unsigned int

Durations can never be negative, so it makes sense to consistently use
unsigned int for LIRC transmission. Contrary to the initial impression,
this shouldn't actually change the userspace API.

Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 10 deletions

diff --git a/drivers/media/rc/rc-loopback.c b/drivers/media/rc/rc-loopback.c
index cc846b2619c..efc6a514348 100644
--- a/drivers/media/rc/rc-loopback.c
+++ b/drivers/media/rc/rc-loopback.c
@@ -101,21 +101,14 @@ static int loop_set_rx_carrier_range(struct rc_dev *dev, u32 min, u32 max)
         return 0;
 }
 
-static int loop_tx_ir(struct rc_dev *dev, int *txbuf, u32 n)
+static int loop_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 {
         struct loopback_dev *lodev = dev->priv;
         u32 rxmask;
-        unsigned count;
         unsigned total_duration = 0;
         unsigned i;
         DEFINE_IR_RAW_EVENT(rawir);
 
-        if (n == 0 || n % sizeof(int)) {
-                dprintk("invalid tx buffer size\n");
-                return -EINVAL;
-        }
-
-        count = n / sizeof(int);
         for (i = 0; i < count; i++)
                 total_duration += abs(txbuf[i]);
 
@@ -142,7 +135,7 @@ static int loop_tx_ir(struct rc_dev *dev, int *txbuf, u32 n)
 
         for (i = 0; i < count; i++) {
                 rawir.pulse = i % 2 ? false : true;
-                rawir.duration = abs(txbuf[i]) * 1000;
+                rawir.duration = txbuf[i] * 1000;
                 if (rawir.duration)
                         ir_raw_event_store_with_filter(dev, &rawir);
         }
@@ -158,7 +151,7 @@ out:
         /* Lirc expects this function to take as long as the total duration */
         set_current_state(TASK_INTERRUPTIBLE);
         schedule_timeout(usecs_to_jiffies(total_duration));
-        return n;
+        return count;
 }
 
 static void loop_set_idle(struct rc_dev *dev, bool enable)