From: Magnus Damm Date: Fri, 11 Jul 2008 23:59:34 +0000 (-0300) Subject: V4L/DVB (8338): soc_camera: Move spinlocks X-Git-Tag: v2.6.27-rc1~966^2~48 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a034d1b76b173b37f9a3646aa8f50a2c14a0f3ea;p=linux-2.6 V4L/DVB (8338): soc_camera: Move spinlocks This patch moves the spinlock handling from soc_camera.c to the actual camera host driver. The spinlock_alloc/free callbacks are replaced with code in init_videobuf(). So far all camera host drivers implement their own spinlock_alloc/free methods anyway, and videobuf_queue_core_init() BUGs on a NULL spinlock argument, so, new camera host drivers will not forget to provide a spinlock when initialising their videobuf queues. Signed-off-by: Magnus Damm Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c index c3a7d476dc..b15f82c497 100644 --- a/drivers/media/video/pxa_camera.c +++ b/drivers/media/video/pxa_camera.c @@ -583,12 +583,15 @@ static struct videobuf_queue_ops pxa_videobuf_ops = { .buf_release = pxa_videobuf_release, }; -static void pxa_camera_init_videobuf(struct videobuf_queue *q, spinlock_t *lock, +static void pxa_camera_init_videobuf(struct videobuf_queue *q, struct soc_camera_device *icd) { + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); + struct pxa_camera_dev *pcdev = ici->priv; + /* We must pass NULL as dev pointer, then all pci_* dma operations * transform to normal dma_* ones. */ - videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, lock, + videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, &pcdev->lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, sizeof(struct pxa_buffer), icd); } @@ -994,15 +997,6 @@ 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, @@ -1015,7 +1009,6 @@ 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 38a89f1331..e39b98f1ec 100644 --- a/drivers/media/video/soc_camera.c +++ b/drivers/media/video/soc_camera.c @@ -183,7 +183,6 @@ 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)); @@ -210,13 +209,6 @@ static int soc_camera_open(struct inode *inode, struct file *file) } 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 */ @@ -234,17 +226,12 @@ static int soc_camera_open(struct inode *inode, struct file *file) file->private_data = icf; dev_dbg(&icd->dev, "camera device open\n"); - ici->ops->init_videobuf(&icf->vb_vidq, icf->lock, icd); + ici->ops->init_videobuf(&icf->vb_vidq, icd); return 0; /* 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); @@ -260,15 +247,11 @@ 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); @@ -764,21 +747,6 @@ 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; @@ -808,11 +776,6 @@ 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 b204c0dee9..bae1602136 100644 --- a/include/media/soc_camera.h +++ b/include/media/soc_camera.h @@ -48,7 +48,6 @@ 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 { @@ -67,15 +66,13 @@ struct soc_camera_host_ops { int (*set_fmt_cap)(struct soc_camera_device *, __u32, struct v4l2_rect *); int (*try_fmt_cap)(struct soc_camera_device *, struct v4l2_format *); - void (*init_videobuf)(struct videobuf_queue*, spinlock_t *, + void (*init_videobuf)(struct videobuf_queue *, struct soc_camera_device *); int (*reqbufs)(struct soc_camera_file *, struct v4l2_requestbuffers *); int (*querycap)(struct soc_camera_host *, struct v4l2_capability *); 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 {