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[media] tlg2300: allow multiple opens

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Due to a poor administration of the driver state it wasn't possible to open
a video or vbi device multiple times.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2012-07-16 11:52:41 -03:00 committed by Mauro Carvalho Chehab
parent d4de6e4062
commit 60c66b6f27
2 changed files with 15 additions and 26 deletions
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1
drivers/media/usb/tlg2300/pd-common.h
View File

@ -26,7 +26,6 @@
#define POSEIDON_STATE_ANALOG (0x0001)
#define POSEIDON_STATE_FM (0x0002)
#define POSEIDON_STATE_DVBT (0x0004)
#define POSEIDON_STATE_VBI (0x0008)
#define POSEIDON_STATE_DISCONNECT (0x0080)
#define PM_SUSPEND_DELAY 3

40
drivers/media/usb/tlg2300/pd-video.c
View File

@ -1352,12 +1352,14 @@ static int pd_video_open(struct file *file)
mutex_lock(&pd->lock);
usb_autopm_get_interface(pd->interface);
if (vfd->vfl_type == VFL_TYPE_GRABBER
&& !(pd->state & POSEIDON_STATE_ANALOG)) {
front = kzalloc(sizeof(struct front_face), GFP_KERNEL);
if (!front)
goto out;
if (pd->state && !(pd->state & POSEIDON_STATE_ANALOG)) {
ret = -EBUSY;
goto out;
}
front = kzalloc(sizeof(struct front_face), GFP_KERNEL);
if (!front)
goto out;
if (vfd->vfl_type == VFL_TYPE_GRABBER) {
pd->cur_transfer_mode = usb_transfer_mode;/* bulk or iso */
init_video_context(&pd->video_data.context);
@ -1368,7 +1370,6 @@ static int pd_video_open(struct file *file)
goto out;
}
pd->state |= POSEIDON_STATE_ANALOG;
front->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
pd->video_data.users++;
set_debug_mode(vfd, debug_mode);
@ -1379,13 +1380,7 @@ static int pd_video_open(struct file *file)
V4L2_FIELD_INTERLACED,/* video is interlacd */
sizeof(struct videobuf_buffer),/*it's enough*/
front, NULL);
} else if (vfd->vfl_type == VFL_TYPE_VBI
&& !(pd->state & POSEIDON_STATE_VBI)) {
front = kzalloc(sizeof(struct front_face), GFP_KERNEL);
if (!front)
goto out;
pd->state |= POSEIDON_STATE_VBI;
} else {
front->type = V4L2_BUF_TYPE_VBI_CAPTURE;
pd->vbi_data.front = front;
pd->vbi_data.users++;
@ -1396,19 +1391,15 @@ static int pd_video_open(struct file *file)
V4L2_FIELD_NONE, /* vbi is NONE mode */
sizeof(struct videobuf_buffer),
front, NULL);
} else {
/* maybe add FM support here */
log("other ");
ret = -EINVAL;
goto out;
}
front->pd = pd;
front->curr_frame = NULL;
pd->state |= POSEIDON_STATE_ANALOG;
front->pd = pd;
front->curr_frame = NULL;
INIT_LIST_HEAD(&front->active);
spin_lock_init(&front->queue_lock);
file->private_data = front;
file->private_data = front;
kref_get(&pd->kref);
mutex_unlock(&pd->lock);
@ -1429,8 +1420,6 @@ static int pd_video_release(struct file *file)
mutex_lock(&pd->lock);
if (front->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
pd->state &= ~POSEIDON_STATE_ANALOG;
/* stop the device, and free the URBs */
usb_transfer_stop(&pd->video_data);
free_all_urb(&pd->video_data);
@ -1442,10 +1431,11 @@ static int pd_video_release(struct file *file)
pd->file_for_stream = NULL;
pd->video_data.users--;
} else if (front->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
pd->state &= ~POSEIDON_STATE_VBI;
pd->vbi_data.front = NULL;
pd->vbi_data.users--;
}
if (!pd->vbi_data.users && !pd->video_data.users)
pd->state &= ~POSEIDON_STATE_ANALOG;
videobuf_stop(&front->q);
videobuf_mmap_free(&front->q);