[PATCH 5.10 170/193] media: lirc: drop trailing space from scancode transmit

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5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sean Young <sean@xxxxxxxx>

commit c8a489f820179fb12251e262b50303c29de991ac upstream.

When transmitting, infrared drivers expect an odd number of samples; iow
without a trailing space. No problems have been observed so far, so
this is just belt and braces.

Fixes: 9b6192589be7 ("media: lirc: implement scancode sending")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sean Young <sean@xxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/media/rc/lirc_dev.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/media/rc/lirc_dev.c
+++ b/drivers/media/rc/lirc_dev.c
@@ -286,7 +286,11 @@ static ssize_t lirc_transmit(struct file
 		if (ret < 0)
 			goto out_kfree_raw;
 
-		count = ret;
+		/* drop trailing space */
+		if (!(ret % 2))
+			count = ret - 1;
+		else
+			count = ret;
 
 		txbuf = kmalloc_array(count, sizeof(unsigned int), GFP_KERNEL);
 		if (!txbuf) {






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