diff options
| -rw-r--r-- | drivers/media/video/pxa_camera.c | 10 | ||||
| -rw-r--r-- | drivers/media/video/soc_camera.c | 46 | ||||
| -rw-r--r-- | include/media/soc_camera.h | 3 |
3 files changed, 54 insertions, 5 deletions
diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c index 9758f7eb593..bef3c9c7902 100644 --- a/drivers/media/video/pxa_camera.c +++ b/drivers/media/video/pxa_camera.c @@ -803,6 +803,15 @@ static int pxa_camera_querycap(struct soc_camera_host *ici, return 0; } +static spinlock_t *pxa_camera_spinlock_alloc(struct soc_camera_file *icf) +{ + struct soc_camera_host *ici = + to_soc_camera_host(icf->icd->dev.parent); + struct pxa_camera_dev *pcdev = ici->priv; + + return &pcdev->lock; +} + static struct soc_camera_host_ops pxa_soc_camera_host_ops = { .owner = THIS_MODULE, .add = pxa_camera_add_device, @@ -814,6 +823,7 @@ static struct soc_camera_host_ops pxa_soc_camera_host_ops = { .querycap = pxa_camera_querycap, .try_bus_param = pxa_camera_try_bus_param, .set_bus_param = pxa_camera_set_bus_param, + .spinlock_alloc = pxa_camera_spinlock_alloc, }; /* Should be allocated dynamically too, but we have only one. */ diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c index 43c8110599e..1e921578804 100644 --- a/drivers/media/video/soc_camera.c +++ b/drivers/media/video/soc_camera.c @@ -184,6 +184,7 @@ static int soc_camera_open(struct inode *inode, struct file *file) struct soc_camera_device *icd; struct soc_camera_host *ici; struct soc_camera_file *icf; + spinlock_t *lock; int ret; icf = vmalloc(sizeof(*icf)); @@ -209,10 +210,16 @@ static int soc_camera_open(struct inode *inode, struct file *file) goto emgi; } - icd->use_count++; - icf->icd = icd; + icf->lock = ici->ops->spinlock_alloc(icf); + if (!icf->lock) { + ret = -ENOMEM; + goto esla; + } + + icd->use_count++; + /* Now we really have to activate the camera */ if (icd->use_count == 1) { ret = ici->ops->add(icd); @@ -229,8 +236,8 @@ static int soc_camera_open(struct inode *inode, struct file *file) dev_dbg(&icd->dev, "camera device open\n"); /* We must pass NULL as dev pointer, then all pci_* dma operations - * transform to normal dma_* ones. Do we need an irqlock? */ - videobuf_queue_sg_init(&icf->vb_vidq, ici->vbq_ops, NULL, NULL, + * transform to normal dma_* ones. */ + videobuf_queue_sg_init(&icf->vb_vidq, ici->vbq_ops, NULL, icf->lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, ici->msize, icd); @@ -238,6 +245,11 @@ static int soc_camera_open(struct inode *inode, struct file *file) /* All errors are entered with the video_lock held */ eiciadd: + lock = icf->lock; + icf->lock = NULL; + if (ici->ops->spinlock_free) + ici->ops->spinlock_free(lock); +esla: module_put(ici->ops->owner); emgi: module_put(icd->ops->owner); @@ -253,16 +265,20 @@ static int soc_camera_close(struct inode *inode, struct file *file) struct soc_camera_device *icd = icf->icd; struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct video_device *vdev = icd->vdev; + spinlock_t *lock = icf->lock; mutex_lock(&video_lock); icd->use_count--; if (!icd->use_count) ici->ops->remove(icd); + icf->lock = NULL; + if (ici->ops->spinlock_free) + ici->ops->spinlock_free(lock); module_put(icd->ops->owner); module_put(ici->ops->owner); mutex_unlock(&video_lock); - vfree(file->private_data); + vfree(icf); dev_dbg(vdev->dev, "camera device close\n"); @@ -762,6 +778,21 @@ static void dummy_release(struct device *dev) { } +static spinlock_t *spinlock_alloc(struct soc_camera_file *icf) +{ + spinlock_t *lock = kmalloc(sizeof(spinlock_t), GFP_KERNEL); + + if (lock) + spin_lock_init(lock); + + return lock; +} + +static void spinlock_free(spinlock_t *lock) +{ + kfree(lock); +} + int soc_camera_host_register(struct soc_camera_host *ici) { int ret; @@ -792,6 +823,11 @@ int soc_camera_host_register(struct soc_camera_host *ici) if (ret) goto edevr; + if (!ici->ops->spinlock_alloc) { + ici->ops->spinlock_alloc = spinlock_alloc; + ici->ops->spinlock_free = spinlock_free; + } + scan_add_host(ici); return 0; diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h index 80e1193c07d..6a8c8be7a1a 100644 --- a/include/media/soc_camera.h +++ b/include/media/soc_camera.h @@ -48,6 +48,7 @@ struct soc_camera_device { struct soc_camera_file { struct soc_camera_device *icd; struct videobuf_queue vb_vidq; + spinlock_t *lock; }; struct soc_camera_host { @@ -73,6 +74,8 @@ struct soc_camera_host_ops { int (*try_bus_param)(struct soc_camera_device *, __u32); int (*set_bus_param)(struct soc_camera_device *, __u32); unsigned int (*poll)(struct file *, poll_table *); + spinlock_t* (*spinlock_alloc)(struct soc_camera_file *); + void (*spinlock_free)(spinlock_t *); }; struct soc_camera_link { |