[PATCH 4.9 32/93] media: lirc: LIRC_GET_REC_RESOLUTION should return microseconds

From: Greg Kroah-Hartman
Date: Wed Aug 09 2017 - 14:33:18 EST


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

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

From: Sean Young <sean@xxxxxxxx>

commit 9f5039ba440e499d85c29b1ddbc3cbc9dc90e44b upstream.

Since commit e8f4818895b3 ("[media] lirc: advertise
LIRC_CAN_GET_REC_RESOLUTION and improve") lircd uses the ioctl
LIRC_GET_REC_RESOLUTION to determine the shortest pulse or space that
the hardware can detect. This breaks decoding in lirc because lircd
expects the answer in microseconds, but nanoseconds is returned.

Reported-by: Derek <user.vdr@xxxxxxxxx>
Tested-by: Derek <user.vdr@xxxxxxxxx>
Signed-off-by: Sean Young <sean@xxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/media/rc/ir-lirc-codec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/rc/ir-lirc-codec.c
+++ b/drivers/media/rc/ir-lirc-codec.c
@@ -254,7 +254,7 @@ static long ir_lirc_ioctl(struct file *f
return 0;

case LIRC_GET_REC_RESOLUTION:
- val = dev->rx_resolution;
+ val = dev->rx_resolution / 1000;
break;

case LIRC_SET_WIDEBAND_RECEIVER: