From 1f8d30083abc17897b897787c39d446eb9d99fe0 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 13 Jan 2008 19:40:30 -0300 Subject: [PATCH] V4L/DVB (7023): Fix a regresion left by changeset 7e65d6e8f6df Changeset 7e65d6e8f6df removed a very bad hack on mmap(). However, the fixes weren't considering usermap and overlay memory models. This were breaking direct reading from /dev/video?, used mostly by mpeg aware drivers. Thanks to Steven Toth for reporting the issue and bissecting it. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/videobuf-core.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/media/video/videobuf-core.c b/drivers/media/video/videobuf-core.c index c3adbd686ffe..80a14da9acef 100644 --- a/drivers/media/video/videobuf-core.c +++ b/drivers/media/video/videobuf-core.c @@ -102,10 +102,14 @@ int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, since mmap_mapper() method should be called before _iolock. On some cases, the mmap_mapper() is called only after scheduling. */ - wait_event_timeout(vb->done, q->is_mmapped, msecs_to_jiffies(100)); - if (!q->is_mmapped) { - printk(KERN_ERR "Error: mmap_mapper() never called!\n"); - return -EINVAL; + if (vb->memory == V4L2_MEMORY_MMAP) { + wait_event_timeout(vb->done, q->is_mmapped, + msecs_to_jiffies(100)); + if (!q->is_mmapped) { + printk(KERN_ERR + "Error: mmap_mapper() never called!\n"); + return -EINVAL; + } } return CALL(q, iolock, q, vb, fbuf); -- GitLab