diff options
| author | David Dillow <dave@thedillows.org> | 2012-06-18 00:15:21 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-19 08:58:54 -0700 |
| commit | 9ab2f39f3ebbd4ccf2cdd75d564ee09c77c722ab (patch) | |
| tree | 20d9a2e301f5fa5f91a98605baa1e4a4b546bd89 | |
| parent | dfd45e89bc8040c45ad5df89fb01d7d0138ec953 (diff) | |
media: cx231xx: don't DMA to random addresses
commit a7deca6fa79d5c65575532e780f3c93f6bf8ddad upstream.
Commit 7a6f6c29d264cdd2fe0eb3d923217eed5f0ad134 (cx231xx: use
URB_NO_TRANSFER_DMA_MAP) was intended to avoid mapping the DMA buffer
for URB twice. This works for the URBs allocated with usb_alloc_urb(),
as those are allocated from cohernent DMA pools, but the flag was also
added for the VBI and audio URBs, which have a manually allocated area.
This leaves the random trash in the structure after allocation as the
DMA address, corrupting memory and preventing VBI and audio from
working. Letting the USB core map the buffers solves the problem.
Signed-off-by: David Dillow <dave@thedillows.org>
Cc: Sri Deevi <srinivasa.deevi@conexant.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/media/video/cx231xx/cx231xx-audio.c | 4 | ||||
| -rw-r--r-- | drivers/media/video/cx231xx/cx231xx-vbi.c | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/drivers/media/video/cx231xx/cx231xx-audio.c b/drivers/media/video/cx231xx/cx231xx-audio.c index a2c2b7d343ec..e5742a0e19a0 100644 --- a/drivers/media/video/cx231xx/cx231xx-audio.c +++ b/drivers/media/video/cx231xx/cx231xx-audio.c @@ -307,7 +307,7 @@ static int cx231xx_init_audio_isoc(struct cx231xx *dev) urb->context = dev; urb->pipe = usb_rcvisocpipe(dev->udev, dev->adev.end_point_addr); - urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; + urb->transfer_flags = URB_ISO_ASAP; urb->transfer_buffer = dev->adev.transfer_buffer[i]; urb->interval = 1; urb->complete = cx231xx_audio_isocirq; @@ -368,7 +368,7 @@ static int cx231xx_init_audio_bulk(struct cx231xx *dev) urb->context = dev; urb->pipe = usb_rcvbulkpipe(dev->udev, dev->adev.end_point_addr); - urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; + urb->transfer_flags = 0; urb->transfer_buffer = dev->adev.transfer_buffer[i]; urb->complete = cx231xx_audio_bulkirq; urb->transfer_buffer_length = sb_size; diff --git a/drivers/media/video/cx231xx/cx231xx-vbi.c b/drivers/media/video/cx231xx/cx231xx-vbi.c index 8cdee5f78f13..9c5967e1d0c6 100644 --- a/drivers/media/video/cx231xx/cx231xx-vbi.c +++ b/drivers/media/video/cx231xx/cx231xx-vbi.c @@ -452,7 +452,7 @@ int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets, return -ENOMEM; } dev->vbi_mode.bulk_ctl.urb[i] = urb; - urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; + urb->transfer_flags = 0; dev->vbi_mode.bulk_ctl.transfer_buffer[i] = kzalloc(sb_size, GFP_KERNEL); |