If more than 127 different lengths are transmitted then the driver causes
an overrun on sample_lens. Try to send as much as possible and return the
amount sent.
Signed-off-by: Sean Young <sean@xxxxxxxx>
---
drivers/media/rc/redrat3.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/media/rc/redrat3.c b/drivers/media/rc/redrat3.c
index 1800326..1b37fe2 100644
--- a/drivers/media/rc/redrat3.c
+++ b/drivers/media/rc/redrat3.c
@@ -195,9 +195,6 @@ struct redrat3_dev {
dma_addr_t dma_in;
dma_addr_t dma_out;
- /* locks this structure */
- struct mutex lock;
-
/* rx signal timeout timer */
struct timer_list rx_timeout;
u32 hw_timeout;
@@ -922,8 +919,7 @@ static int redrat3_transmit_ir(struct rc_dev *rcdev, unsigned *txbuf,
return -EAGAIN;
}
- if (count > (RR3_DRIVER_MAXLENS * 2))
- return -EINVAL;
+ count = min_t(unsigned, count, RR3_MAX_SIG_SIZE - RR3_TX_TRAILER_LEN);
/* rr3 will disable rc detector on transmit */
rr3->det_enabled = false;
@@ -936,24 +932,22 @@ static int redrat3_transmit_ir(struct rc_dev *rcdev, unsigned *txbuf,
}
for (i = 0; i < count; i++) {
+ cur_sample_len = redrat3_us_to_len(txbuf[i]);
for (lencheck = 0; lencheck < curlencheck; lencheck++) {
- cur_sample_len = redrat3_us_to_len(txbuf[i]);
if (sample_lens[lencheck] == cur_sample_len)
break;
}
if (lencheck == curlencheck) {
- cur_sample_len = redrat3_us_to_len(txbuf[i]);
rr3_dbg(dev, "txbuf[%d]=%u, pos %d, enc %u\n",
i, txbuf[i], curlencheck, cur_sample_len);
- if (curlencheck < 255) {
+ if (curlencheck < RR3_DRIVER_MAXLENS) {
/* now convert the value to a proper
* rr3 value.. */
sample_lens[curlencheck] = cur_sample_len;
curlencheck++;
} else {
- dev_err(dev, "signal too long\n");
- ret = -EINVAL;
- goto out;
+ count = i - 1;
+ break;
}
}
}
@@ -1087,6 +1081,7 @@ static struct rc_dev *redrat3_init_rc_dev(struct redrat3_dev *rr3)
rc->tx_ir = redrat3_transmit_ir;
rc->s_tx_carrier = redrat3_set_tx_carrier;
rc->driver_name = DRIVER_NAME;
+ rc->rx_resolution = US_TO_NS(2);
rc->map_name = RC_MAP_HAUPPAUGE;
ret = rc_register_device(rc);
@@ -1202,7 +1197,6 @@ static int redrat3_dev_probe(struct usb_interface *intf,
rr3->bulk_out_buf, ep_out->wMaxPacketSize,
(usb_complete_t)redrat3_write_bulk_callback, rr3);
- mutex_init(&rr3->lock);
rr3->udev = udev;
redrat3_reset(rr3);
--
1.8.1
--
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