diff options
| author | Sean Young <sean@mess.org> | 2013-01-29 08:19:31 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-02-08 14:18:16 -0200 |
| commit | 06eae25f162e2a0d9e60f0ad3ec3d14c738fbe68 (patch) | |
| tree | ef064afc62db275ad060a5eebe34542f36699a56 | |
| parent | db8ee1064c97879bff614d653158dff1894d2e37 (diff) | |
| download | linux-3.10-06eae25f162e2a0d9e60f0ad3ec3d14c738fbe68.tar.gz linux-3.10-06eae25f162e2a0d9e60f0ad3ec3d14c738fbe68.tar.bz2 linux-3.10-06eae25f162e2a0d9e60f0ad3ec3d14c738fbe68.zip | |
[media] redrat3: fix transmit return value and overrun
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@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/rc/redrat3.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/drivers/media/rc/redrat3.c b/drivers/media/rc/redrat3.c index 1800326f93e..1b37fe2779f 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); |