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| author | Tuukka Toivonen <tuukka.o.toivonen@nokia.com> | 2009-07-23 17:56:25 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-12-05 23:40:40 +0300 |
| commit | 7cbefad085c9112d0b1814db18423e5da072f5c8 (patch) | |
| tree | 0cfe7890db3e487f45255a1ea4e790c381823cf6 /drivers/media/video/videobuf-core.c | |
| parent | 131db3a1acbd947a9c3257b95ee860a58ce0dffa (diff) | |
| download | linux-7cbefad085c9112d0b1814db18423e5da072f5c8.tar.xz | |
V4L/DVB (13165): videobuf do not force buffer size to be multiple of PAGE_SIZE
When the image size (bytesperline*height) is not multiple
of PAGE_SIZE, v4l2 rounded the required buffer size to
be multiple of PAGE_SIZE. This prevented user space
to store images directly into userptr buffers which were
not multiple of PAGE_SIZE. This constraint is removed.
The start address is still assumed to be required
page-aligned, ie., when v4l2 allocates mmap buffers,
the offset between different buffers is page-aligned.
Signed-off-by: Tuukka Toivonen <tuukka.o.toivonen@nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/videobuf-core.c')
| -rw-r--r-- | drivers/media/video/videobuf-core.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/media/video/videobuf-core.c b/drivers/media/video/videobuf-core.c index 8e93c6f25c83..a96b08d3df5a 100644 --- a/drivers/media/video/videobuf-core.c +++ b/drivers/media/video/videobuf-core.c @@ -360,7 +360,7 @@ int __videobuf_mmap_setup(struct videobuf_queue *q, q->bufs[i]->bsize = bsize; switch (memory) { case V4L2_MEMORY_MMAP: - q->bufs[i]->boff = bsize * i; + q->bufs[i]->boff = PAGE_ALIGN(bsize) * i; break; case V4L2_MEMORY_USERPTR: case V4L2_MEMORY_OVERLAY: @@ -430,9 +430,8 @@ int videobuf_reqbufs(struct videobuf_queue *q, count = VIDEO_MAX_FRAME; size = 0; q->ops->buf_setup(q, &count, &size); - size = PAGE_ALIGN(size); dprintk(1, "reqbufs: bufs=%d, size=0x%x [%d pages total]\n", - count, size, (count*size)>>PAGE_SHIFT); + count, size, (count*PAGE_ALIGN(size))>>PAGE_SHIFT); retval = __videobuf_mmap_setup(q, count, size, req->memory); if (retval < 0) { @@ -1099,7 +1098,7 @@ int videobuf_cgmbuf(struct videobuf_queue *q, mbuf->size = 0; for (i = 0; i < mbuf->frames; i++) { mbuf->offsets[i] = q->bufs[i]->boff; - mbuf->size += q->bufs[i]->bsize; + mbuf->size += PAGE_ALIGN(q->bufs[i]->bsize); } return 0; |