V4L/DVB (11840): change kmalloc to vmalloc for sglist allocation in videobuf_dma_map/unmap

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Change kmalloc()/kfree() to vmalloc()/vfree() for sglist allocation
during videobuf_dma_map() and videobuf_dma_unmap()

High resolution sensors might require too many contiguous pages
to be allocated for sglist by kmalloc() during videobuf_dma_map()
(i.e. 256Kib for 8MP sensor).
In such situations, kmalloc() could face some problem to find the
required free memory. vmalloc() is a safer solution instead, as the
allocated memory does not need to be contiguous.

Signed-off-by: David Cohen <david.cohen@nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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Cohen David.A 2009-05-11 11:00:20 -03:00 • committed by Mauro Carvalho Chehab

parent 04a37e0f32

commit 1010ed1327

2 changed files with 11 additions and 8 deletions

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2

Documentation/video4linux/CARDLIST.em28xx

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17

drivers/media/video/videobuf-dma-sg.c

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