redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

V4L/DVB (3569): PATCH: switch cpia2 to mutexes and use ioctl 32 compat lib func

Browse source 
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Alan Cox 2006-03-20 13:59:42 -03:00 committed by Mauro Carvalho Chehab
parent bc2c7c365b
commit 2ae151911e
3 changed files with 43 additions and 42 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/media/video/cpia2/cpia2.h
View file

@ -381,7 +381,7 @@ struct cpia2_fh {
struct camera_data { struct camera_data {
/* locks */ /* locks */
struct semaphore busy_lock; /* guard against SMP multithreading */ struct mutex busy_lock; /* guard against SMP multithreading */
struct v4l2_prio_state prio; struct v4l2_prio_state prio;
/* camera status */ /* camera status */

40
drivers/media/video/cpia2/cpia2_core.c
View file

@ -2238,7 +2238,7 @@ struct camera_data *cpia2_init_camera_struct(void)
memset(cam, 0, sizeof(struct camera_data)); memset(cam, 0, sizeof(struct camera_data));
cam->present = 1; cam->present = 1;
init_MUTEX(&cam->busy_lock); mutex_init(&cam->busy_lock);
init_waitqueue_head(&cam->wq_stream); init_waitqueue_head(&cam->wq_stream);
return cam; return cam;
@ -2371,12 +2371,12 @@ long cpia2_read(struct camera_data *cam,
} }
/* make this _really_ smp and multithread-safe */ /* make this _really_ smp and multithread-safe */
if (down_interruptible(&cam->busy_lock)) if (mutex_lock_interruptible(&cam->busy_lock))
return -ERESTARTSYS; return -ERESTARTSYS;
if (!cam->present) { if (!cam->present) {
LOG("%s: camera removed\n",__FUNCTION__); LOG("%s: camera removed\n",__FUNCTION__);
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return 0; /* EOF */ return 0; /* EOF */
} }
@ -2389,34 +2389,34 @@ long cpia2_read(struct camera_data *cam,
/* Copy cam->curbuff in case it changes while we're processing */ /* Copy cam->curbuff in case it changes while we're processing */
frame = cam->curbuff; frame = cam->curbuff;
if (noblock && frame->status != FRAME_READY) { if (noblock && frame->status != FRAME_READY) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return -EAGAIN; return -EAGAIN;
} }
if(frame->status != FRAME_READY) { if(frame->status != FRAME_READY) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
wait_event_interruptible(cam->wq_stream, wait_event_interruptible(cam->wq_stream,
!cam->present || !cam->present ||
(frame = cam->curbuff)->status == FRAME_READY); (frame = cam->curbuff)->status == FRAME_READY);
if (signal_pending(current)) if (signal_pending(current))
return -ERESTARTSYS; return -ERESTARTSYS;
/* make this _really_ smp and multithread-safe */ /* make this _really_ smp and multithread-safe */
if (down_interruptible(&cam->busy_lock)) { if (mutex_lock_interruptible(&cam->busy_lock)) {
return -ERESTARTSYS; return -ERESTARTSYS;
} }
if(!cam->present) { if(!cam->present) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return 0; return 0;
} }
} }
/* copy data to user space */ /* copy data to user space */
if (frame->length > count) { if (frame->length > count) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return -EFAULT; return -EFAULT;
} }
if (copy_to_user(buf, frame->data, frame->length)) { if (copy_to_user(buf, frame->data, frame->length)) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return -EFAULT; return -EFAULT;
} }
@ -2424,7 +2424,7 @@ long cpia2_read(struct camera_data *cam,
frame->status = FRAME_EMPTY; frame->status = FRAME_EMPTY;
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return count; return count;
} }
@ -2443,10 +2443,10 @@ unsigned int cpia2_poll(struct camera_data *cam, struct file *filp,
return POLLERR; return POLLERR;
} }
down(&cam->busy_lock); mutex_lock(&cam->busy_lock);
if(!cam->present) { if(!cam->present) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return POLLHUP; return POLLHUP;
} }
@ -2456,16 +2456,16 @@ unsigned int cpia2_poll(struct camera_data *cam, struct file *filp,
cam->params.camera_state.stream_mode); cam->params.camera_state.stream_mode);
} }
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
poll_wait(filp, &cam->wq_stream, wait); poll_wait(filp, &cam->wq_stream, wait);
down(&cam->busy_lock); mutex_lock(&cam->busy_lock);
if(!cam->present) if(!cam->present)
status = POLLHUP; status = POLLHUP;
else if(cam->curbuff->status == FRAME_READY) else if(cam->curbuff->status == FRAME_READY)
status = POLLIN | POLLRDNORM; status = POLLIN | POLLRDNORM;
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return status; return status;
} }
@ -2488,18 +2488,18 @@ int cpia2_remap_buffer(struct camera_data *cam, struct vm_area_struct *vma)
DBG("mmap offset:%ld size:%ld\n", start_offset, size); DBG("mmap offset:%ld size:%ld\n", start_offset, size);
/* make this _really_ smp-safe */ /* make this _really_ smp-safe */
if (down_interruptible(&cam->busy_lock)) if (mutex_lock_interruptible(&cam->busy_lock))
return -ERESTARTSYS; return -ERESTARTSYS;
if (!cam->present) { if (!cam->present) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return -ENODEV; return -ENODEV;
} }
if (size > cam->frame_size*cam->num_frames || if (size > cam->frame_size*cam->num_frames ||
(start_offset % cam->frame_size) != 0 || (start_offset % cam->frame_size) != 0 ||
(start_offset+size > cam->frame_size*cam->num_frames)) { (start_offset+size > cam->frame_size*cam->num_frames)) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return -EINVAL; return -EINVAL;
} }
@ -2507,7 +2507,7 @@ int cpia2_remap_buffer(struct camera_data *cam, struct vm_area_struct *vma)
while (size > 0) { while (size > 0) {
page = kvirt_to_pa(pos); page = kvirt_to_pa(pos);
if (remap_pfn_range(vma, start, page >> PAGE_SHIFT, PAGE_SIZE, PAGE_SHARED)) { if (remap_pfn_range(vma, start, page >> PAGE_SHIFT, PAGE_SIZE, PAGE_SHARED)) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return -EAGAIN; return -EAGAIN;
} }
start += PAGE_SIZE; start += PAGE_SIZE;
@ -2519,7 +2519,7 @@ int cpia2_remap_buffer(struct camera_data *cam, struct vm_area_struct *vma)
} }
cam->mmapped = true; cam->mmapped = true;
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return 0; return 0;
} }

43
drivers/media/video/cpia2/cpia2_v4l.c
View file

@ -255,7 +255,7 @@ static int cpia2_open(struct inode *inode, struct file *file)
return -ENODEV; return -ENODEV;
} }
if(down_interruptible(&cam->busy_lock)) if(mutex_lock_interruptible(&cam->busy_lock))
return -ERESTARTSYS; return -ERESTARTSYS;
if(!cam->present) { if(!cam->present) {
@ -299,7 +299,7 @@ skip_init:
cpia2_dbg_dump_registers(cam); cpia2_dbg_dump_registers(cam);
err_return: err_return:
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return retval; return retval;
} }
@ -314,7 +314,7 @@ static int cpia2_close(struct inode *inode, struct file *file)
struct camera_data *cam = video_get_drvdata(dev); struct camera_data *cam = video_get_drvdata(dev);
struct cpia2_fh *fh = file->private_data; struct cpia2_fh *fh = file->private_data;
down(&cam->busy_lock); mutex_lock(&cam->busy_lock);
if (cam->present && if (cam->present &&
(cam->open_count == 1 (cam->open_count == 1
@ -347,7 +347,7 @@ static int cpia2_close(struct inode *inode, struct file *file)
} }
} }
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return 0; return 0;
} }
@ -523,11 +523,11 @@ static int sync(struct camera_data *cam, int frame_nr)
return 0; return 0;
} }
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
wait_event_interruptible(cam->wq_stream, wait_event_interruptible(cam->wq_stream,
!cam->streaming || !cam->streaming ||
frame->status == FRAME_READY); frame->status == FRAME_READY);
down(&cam->busy_lock); mutex_lock(&cam->busy_lock);
if (signal_pending(current)) if (signal_pending(current))
return -ERESTARTSYS; return -ERESTARTSYS;
if(!cam->present) if(!cam->present)
@ -1544,11 +1544,11 @@ static int ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
if(frame < 0) { if(frame < 0) {
/* Wait for a frame to become available */ /* Wait for a frame to become available */
struct framebuf *cb=cam->curbuff; struct framebuf *cb=cam->curbuff;
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
wait_event_interruptible(cam->wq_stream, wait_event_interruptible(cam->wq_stream,
!cam->present || !cam->present ||
(cb=cam->curbuff)->status == FRAME_READY); (cb=cam->curbuff)->status == FRAME_READY);
down(&cam->busy_lock); mutex_lock(&cam->busy_lock);
if (signal_pending(current)) if (signal_pending(current))
return -ERESTARTSYS; return -ERESTARTSYS;
if(!cam->present) if(!cam->present)
@ -1591,11 +1591,11 @@ static int cpia2_do_ioctl(struct inode *inode, struct file *file,
return -ENOTTY; return -ENOTTY;
/* make this _really_ smp-safe */ /* make this _really_ smp-safe */
if (down_interruptible(&cam->busy_lock)) if (mutex_lock_interruptible(&cam->busy_lock))
return -ERESTARTSYS; return -ERESTARTSYS;
if (!cam->present) { if (!cam->present) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return -ENODEV; return -ENODEV;
} }
@ -1608,7 +1608,7 @@ static int cpia2_do_ioctl(struct inode *inode, struct file *file,
struct cpia2_fh *fh = file->private_data; struct cpia2_fh *fh = file->private_data;
retval = v4l2_prio_check(&cam->prio, &fh->prio); retval = v4l2_prio_check(&cam->prio, &fh->prio);
if(retval) { if(retval) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return retval; return retval;
} }
break; break;
@ -1618,7 +1618,7 @@ static int cpia2_do_ioctl(struct inode *inode, struct file *file,
{ {
struct cpia2_fh *fh = file->private_data; struct cpia2_fh *fh = file->private_data;
if(fh->prio != V4L2_PRIORITY_RECORD) { if(fh->prio != V4L2_PRIORITY_RECORD) {
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return -EBUSY; return -EBUSY;
} }
break; break;
@ -1847,7 +1847,7 @@ static int cpia2_do_ioctl(struct inode *inode, struct file *file,
break; break;
} }
up(&cam->busy_lock); mutex_unlock(&cam->busy_lock);
return retval; return retval;
} }
@ -1924,14 +1924,15 @@ static void reset_camera_struct_v4l(struct camera_data *cam)
* The v4l video device structure initialized for this device * The v4l video device structure initialized for this device
***/ ***/
static struct file_operations fops_template = { static struct file_operations fops_template = {
.owner= THIS_MODULE, .owner = THIS_MODULE,
.open= cpia2_open, .open = cpia2_open,
.release= cpia2_close, .release = cpia2_close,
.read= cpia2_v4l_read, .read = cpia2_v4l_read,
.poll= cpia2_v4l_poll, .poll = cpia2_v4l_poll,
.ioctl= cpia2_ioctl, .ioctl = cpia2_ioctl,
.llseek= no_llseek, .llseek = no_llseek,
.mmap= cpia2_mmap, .compat_ioctl = v4l_compat_ioctl32,
.mmap = cpia2_mmap,
}; };
static struct video_device cpia2_template = { static struct video_device cpia2_template = {