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| author | Jason Wang <jason77.wang@gmail.com> | 2010-09-03 06:57:19 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-28 21:51:14 -0700 |
| commit | a035671ad3092e51c5c1d92b39a2ef196b5ab83a (patch) | |
| tree | 6fd0f8e9c9cd7abdadcb8a1aa573d3adec6e0a59 /drivers/hid | |
| parent | c1e962e493031fce0a7f15ded4fb16e94d35ac90 (diff) | |
V4L/DVB: gspca - main: Fix a crash of some webcams on ARM arch
commit 882787ff8fdeb0be790547ee9b22b281095e95da upstream.
When plugging some webcams on ARM, the system crashes.
This is because we alloc buffer for an urb through usb_buffer_alloc,
the alloced buffer is already in DMA coherent region, so we should
set the flag of this urb to URB_NO_TRANSFER_DMA_MAP, otherwise when
we submit this urb, the hcd core will handle this address as an
non-DMA address and call dma_map_single/sg to map it. On arm
architecture, dma_map_single a DMA coherent address will be catched
by a BUG_ON().
Signed-off-by: Jason Wang <jason77.wang@gmail.com>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/hid')
0 files changed, 0 insertions, 0 deletions