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[media] s5p-g2d: remove V4L2_FL_LOCK_ALL_FOPS 

Add proper locking to the file operations, allowing for the removal
of the V4L2_FL_LOCK_ALL_FOPS flag.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2012-06-24 06:58:28 -03:00 committed by Mauro Carvalho Chehab
parent b0d5cd6b5f
commit de40cb227d
1 changed files with 21 additions and 6 deletions
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27
drivers/media/video/s5p-g2d/g2d.c
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@ -248,9 +248,14 @@ static int g2d_open(struct file *file)
ctx->in = def_frame;
ctx->out = def_frame;
if (mutex_lock_interruptible(&dev->mutex)) {
kfree(ctx);
return -ERESTARTSYS;
}
ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
if (IS_ERR(ctx->m2m_ctx)) {
ret = PTR_ERR(ctx->m2m_ctx);
mutex_unlock(&dev->mutex);
kfree(ctx);
return ret;
}
@ -264,6 +269,7 @@ static int g2d_open(struct file *file)
v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
ctx->fh.ctrl_handler = &ctx->ctrl_handler;
mutex_unlock(&dev->mutex);
v4l2_info(&dev->v4l2_dev, "instance opened\n");
return 0;
@ -406,13 +412,26 @@ static int vidioc_s_fmt(struct file *file, void *prv, struct v4l2_format *f)
static unsigned int g2d_poll(struct file *file, struct poll_table_struct *wait)
{
struct g2d_ctx *ctx = fh2ctx(file->private_data);
return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
struct g2d_dev *dev = ctx->dev;
unsigned int res;
mutex_lock(&dev->mutex);
res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
mutex_unlock(&dev->mutex);
return res;
}
static int g2d_mmap(struct file *file, struct vm_area_struct *vma)
{
struct g2d_ctx *ctx = fh2ctx(file->private_data);
return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
struct g2d_dev *dev = ctx->dev;
int ret;
if (mutex_lock_interruptible(&dev->mutex))
return -ERESTARTSYS;
ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
mutex_unlock(&dev->mutex);
return ret;
}
static int vidioc_reqbufs(struct file *file, void *priv,
@ -753,10 +772,6 @@ static int g2d_probe(struct platform_device *pdev)
goto unreg_v4l2_dev;
}
*vfd = g2d_videodev;
/* Locking in file operations other than ioctl should be done
by the driver, not the V4L2 core.
This driver needs auditing so that this flag can be removed. */
set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
vfd->lock = &dev->mutex;
ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
if (ret) {