diff options
| author | Sean Young <sean@mess.org> | 2013-07-08 17:33:09 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2013-07-30 17:04:23 -0300 |
| commit | 671ea6707b3fb051ec1bae8e7aa0a91f90e178e0 (patch) | |
| tree | b403d588b2f200677d6be3a34c859b43aa347c64 | |
| parent | 25379bf8bc4d4e83bd74d823048b85a95ae5a521 (diff) | |
| download | kernel_goldelico_gta04-671ea6707b3fb051ec1bae8e7aa0a91f90e178e0.tar.gz kernel_goldelico_gta04-671ea6707b3fb051ec1bae8e7aa0a91f90e178e0.tar.bz2 kernel_goldelico_gta04-671ea6707b3fb051ec1bae8e7aa0a91f90e178e0.zip | |
[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>
| -rw-r--r-- | Documentation/DocBook/media/v4l/lirc_device_interface.xml | 4 | ||||
| -rw-r--r-- | drivers/media/rc/iguanair.c | 4 | ||||
| -rw-r--r-- | drivers/media/rc/redrat3.c | 7 |
3 files changed, 9 insertions, 6 deletions
diff --git a/Documentation/DocBook/media/v4l/lirc_device_interface.xml b/Documentation/DocBook/media/v4l/lirc_device_interface.xml index 8d7eb6bf631..34cada2ca71 100644 --- a/Documentation/DocBook/media/v4l/lirc_device_interface.xml +++ b/Documentation/DocBook/media/v4l/lirc_device_interface.xml @@ -46,7 +46,9 @@ describing an IR signal are read from the chardev.</para> values. Pulses and spaces are only marked implicitly by their position. The data must start and end with a pulse, therefore, the data must always include an uneven number of samples. The write function must block until the data has -been transmitted by the hardware.</para> +been transmitted by the hardware. If more data is provided than the hardware +can send, the driver returns EINVAL.</para> + </section> <section id="lirc_ioctl"> diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c index a4ab2e6b3f8..19632b1c219 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 37494433dc9..0042367b060 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; |