diff options
author | Andres Salomon <dilinger@queued.net> | 2007-09-19 02:44:18 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-10-09 22:14:49 -0300 |
commit | 23869e236846657415654e8f5fbda9faec8d19e4 (patch) | |
tree | 4a8b81e51670712760643c0930783b1fa2ae3e1a /drivers/media/video/pwc/pwc-if.c | |
parent | 4562fbeac61468f80a8d05e5ed50660bd97b4859 (diff) |
V4L/DVB (6235): cafe_ccic: default to allocating DMA buffers at probe time
By default, we allocate DMA buffers when actually reading from the video
capture device. On a system with 128MB or 256MB of ram, it's very easy
for that memory to quickly become fragmented. We've had users report
having 30+MB of memory free, but the cafe_ccic driver is still unable to
allocate DMA buffers.
Our workaround has been to make use of the 'alloc_bufs_at_load' parameter
to allocate DMA buffers during device probing. This patch makes DMA
buffer allocation happen during device probe by default, and changes
the parameter to 'alloc_bufs_at_read'. The camera hardware is there,
if the cafe_ccic driver is enabled/loaded it should do its best to ensure
that the camera is actually usable; delaying DMA buffer allocation
saves an insignicant amount of memory, and causes the driver to be much
less useful.
Signed-off-by: Andres Salomon <dilinger@debian.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/pwc/pwc-if.c')
0 files changed, 0 insertions, 0 deletions