[media] lirc: make transmit interface consistent

All lirc drivers that can transmit, return EINVAL when they are passed
more than IR data than they can send. That is, except for two drivers
which I touched.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

2 files changed, 6 insertions, 5 deletions

diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c
index a4ab2e6b3f82..19632b1c2190 100644
--- a/drivers/media/rc/iguanair.c
+++ b/drivers/media/rc/iguanair.c
@@ -364,8 +364,8 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count)
                 periods = DIV_ROUND_CLOSEST(txbuf[i] * ir->carrier, 1000000);
                 bytes = DIV_ROUND_UP(periods, 127);
                 if (size + bytes > ir->bufsize) {
-                        count = i;
-                        break;
+                        rc = -EINVAL;
+                        goto out;
                 }
                 while (periods > 127) {
                         ir->packet->payload[size++] = 127 | space;
diff --git a/drivers/media/rc/redrat3.c b/drivers/media/rc/redrat3.c
index 37494433dc9f..0042367b060c 100644
--- a/drivers/media/rc/redrat3.c
+++ b/drivers/media/rc/redrat3.c
@@ -762,7 +762,8 @@ static int redrat3_transmit_ir(struct rc_dev *rcdev, unsigned *txbuf,
                 return -EAGAIN;
         }
 
-        count = min_t(unsigned, count, RR3_MAX_SIG_SIZE - RR3_TX_TRAILER_LEN);
+        if (count > RR3_MAX_SIG_SIZE - RR3_TX_TRAILER_LEN)
+                return -EINVAL;
 
         /* rr3 will disable rc detector on transmit */
         rr3->transmitting = true;
@@ -801,8 +802,8 @@ static int redrat3_transmit_ir(struct rc_dev *rcdev, unsigned *txbuf,
                                                 &irdata->lens[curlencheck]);
                                 curlencheck++;
                         } else {
-                                count = i - 1;
-                                break;
+                                ret = -EINVAL;
+                                goto out;
                         }
                 }
                 irdata->sigdata[i] = lencheck;