diff options
| -rw-r--r-- | drivers/media/video/s5p-g2d/g2d.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/drivers/media/video/s5p-g2d/g2d.c b/drivers/media/video/s5p-g2d/g2d.c index 7c2200435206..0edc2df98732 100644 --- a/drivers/media/video/s5p-g2d/g2d.c +++ b/drivers/media/video/s5p-g2d/g2d.c @@ -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) { |