diff options
| -rw-r--r-- | drivers/media/video/s5p-jpeg/jpeg-core.c | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/drivers/media/video/s5p-jpeg/jpeg-core.c b/drivers/media/video/s5p-jpeg/jpeg-core.c index 813b801238d..be04d584e36 100644 --- a/drivers/media/video/s5p-jpeg/jpeg-core.c +++ b/drivers/media/video/s5p-jpeg/jpeg-core.c @@ -292,6 +292,11 @@ static int s5p_jpeg_open(struct file *file) if (!ctx) return -ENOMEM; + if (mutex_lock_interruptible(&jpeg->lock)) { + ret = -ERESTARTSYS; + goto free; + } + v4l2_fh_init(&ctx->fh, vfd); /* Use separate control handler per file handle */ ctx->fh.ctrl_handler = &ctx->ctrl_handler; @@ -319,20 +324,26 @@ static int s5p_jpeg_open(struct file *file) ctx->out_q.fmt = out_fmt; ctx->cap_q.fmt = s5p_jpeg_find_format(ctx->mode, V4L2_PIX_FMT_YUYV); + mutex_unlock(&jpeg->lock); return 0; error: v4l2_fh_del(&ctx->fh); v4l2_fh_exit(&ctx->fh); + mutex_unlock(&jpeg->lock); +free: kfree(ctx); return ret; } static int s5p_jpeg_release(struct file *file) { + struct s5p_jpeg *jpeg = video_drvdata(file); struct s5p_jpeg_ctx *ctx = fh_to_ctx(file->private_data); + mutex_lock(&jpeg->lock); v4l2_m2m_ctx_release(ctx->m2m_ctx); + mutex_unlock(&jpeg->lock); v4l2_ctrl_handler_free(&ctx->ctrl_handler); v4l2_fh_del(&ctx->fh); v4l2_fh_exit(&ctx->fh); @@ -344,16 +355,27 @@ static int s5p_jpeg_release(struct file *file) static unsigned int s5p_jpeg_poll(struct file *file, struct poll_table_struct *wait) { + struct s5p_jpeg *jpeg = video_drvdata(file); struct s5p_jpeg_ctx *ctx = fh_to_ctx(file->private_data); + unsigned int res; - return v4l2_m2m_poll(file, ctx->m2m_ctx, wait); + mutex_lock(&jpeg->lock); + res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); + mutex_unlock(&jpeg->lock); + return res; } static int s5p_jpeg_mmap(struct file *file, struct vm_area_struct *vma) { + struct s5p_jpeg *jpeg = video_drvdata(file); struct s5p_jpeg_ctx *ctx = fh_to_ctx(file->private_data); + int ret; - return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); + if (mutex_lock_interruptible(&jpeg->lock)) + return -ERESTARTSYS; + ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); + mutex_unlock(&jpeg->lock); + return ret; } static const struct v4l2_file_operations s5p_jpeg_fops = { @@ -1372,10 +1394,6 @@ static int s5p_jpeg_probe(struct platform_device *pdev) jpeg->vfd_encoder->release = video_device_release; jpeg->vfd_encoder->lock = &jpeg->lock; jpeg->vfd_encoder->v4l2_dev = &jpeg->v4l2_dev; - /* 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, &jpeg->vfd_encoder->flags); ret = video_register_device(jpeg->vfd_encoder, VFL_TYPE_GRABBER, -1); if (ret) { @@ -1403,10 +1421,6 @@ static int s5p_jpeg_probe(struct platform_device *pdev) jpeg->vfd_decoder->release = video_device_release; jpeg->vfd_decoder->lock = &jpeg->lock; jpeg->vfd_decoder->v4l2_dev = &jpeg->v4l2_dev; - /* 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, &jpeg->vfd_decoder->flags); ret = video_register_device(jpeg->vfd_decoder, VFL_TYPE_GRABBER, -1); if (ret) { |