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authorHans de Goede <hdegoede@redhat.com>2010-12-31 07:41:54 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-01-19 11:44:59 -0200
commitce5610bca74571674c1970d33063e7c06295a9a4 (patch)
tree18d3c2db4f357767e8d189e68e8089b524d7230b /drivers
parentee3629914b2b115f00f4197e80b1e7cb12881059 (diff)
[media] gspca_main: Allow switching from read to mmap / userptr mode
Some applications (xawtv, qv4l2) mix read and mmap calls. Allow switching from read mode back to mmap mode (by doing a reqbufs). Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/video/gspca/gspca.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 244fb76eaea..4ab906be896 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -1497,6 +1497,7 @@ static int vidioc_reqbufs(struct file *file, void *priv,
return -ERESTARTSYS;
if (gspca_dev->memory != GSPCA_MEMORY_NO
+ && gspca_dev->memory != GSPCA_MEMORY_READ
&& gspca_dev->memory != rb->memory) {
ret = -EBUSY;
goto out;
@@ -1525,6 +1526,9 @@ static int vidioc_reqbufs(struct file *file, void *priv,
gspca_stream_off(gspca_dev);
mutex_unlock(&gspca_dev->usb_lock);
}
+ /* Don't restart the stream when switching from read to mmap mode */
+ if (gspca_dev->memory == GSPCA_MEMORY_READ)
+ streaming = 0;
/* free the previous allocated buffers, if any */
if (gspca_dev->nframes != 0)