[media] s5p-fimc: Remove V4L2_FL_LOCK_ALL_FOPS flag
This patch adds locking for open(), close(), poll() and mmap()
file operations in the driver as a follow up to the changes
done in commit 5126f2590bee412e3053de851cb07f531
"v4l2-dev: add flag to have the core lock all file operations".
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/s5p-fimc/fimc-capture.c b/drivers/media/video/s5p-fimc/fimc-capture.c
index 6a34183..8e413dd 100644
--- a/drivers/media/video/s5p-fimc/fimc-capture.c
+++ b/drivers/media/video/s5p-fimc/fimc-capture.c
@@ -480,48 +480,59 @@
static int fimc_capture_open(struct file *file)
{
struct fimc_dev *fimc = video_drvdata(file);
- int ret;
+ int ret = -EBUSY;
dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
+ if (mutex_lock_interruptible(&fimc->lock))
+ return -ERESTARTSYS;
+
if (fimc_m2m_active(fimc))
- return -EBUSY;
+ goto unlock;
set_bit(ST_CAPT_BUSY, &fimc->state);
ret = pm_runtime_get_sync(&fimc->pdev->dev);
if (ret < 0)
- return ret;
+ goto unlock;
ret = v4l2_fh_open(file);
- if (ret)
- return ret;
-
- if (++fimc->vid_cap.refcnt != 1)
- return 0;
-
- ret = fimc_pipeline_initialize(&fimc->pipeline,
- &fimc->vid_cap.vfd->entity, true);
- if (ret < 0) {
- clear_bit(ST_CAPT_BUSY, &fimc->state);
- pm_runtime_put_sync(&fimc->pdev->dev);
- fimc->vid_cap.refcnt--;
- v4l2_fh_release(file);
- return ret;
+ if (ret) {
+ pm_runtime_put(&fimc->pdev->dev);
+ goto unlock;
}
- ret = fimc_capture_ctrls_create(fimc);
- if (!ret && !fimc->vid_cap.user_subdev_api)
- ret = fimc_capture_set_default_format(fimc);
+ if (++fimc->vid_cap.refcnt == 1) {
+ ret = fimc_pipeline_initialize(&fimc->pipeline,
+ &fimc->vid_cap.vfd->entity, true);
+ if (!ret && !fimc->vid_cap.user_subdev_api)
+ ret = fimc_capture_set_default_format(fimc);
+
+ if (!ret)
+ ret = fimc_capture_ctrls_create(fimc);
+
+ if (ret < 0) {
+ clear_bit(ST_CAPT_BUSY, &fimc->state);
+ pm_runtime_put_sync(&fimc->pdev->dev);
+ fimc->vid_cap.refcnt--;
+ v4l2_fh_release(file);
+ }
+ }
+unlock:
+ mutex_unlock(&fimc->lock);
return ret;
}
static int fimc_capture_close(struct file *file)
{
struct fimc_dev *fimc = video_drvdata(file);
+ int ret;
dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
+ if (mutex_lock_interruptible(&fimc->lock))
+ return -ERESTARTSYS;
+
if (--fimc->vid_cap.refcnt == 0) {
clear_bit(ST_CAPT_BUSY, &fimc->state);
fimc_stop_capture(fimc, false);
@@ -535,22 +546,40 @@
vb2_queue_release(&fimc->vid_cap.vbq);
fimc_ctrls_delete(fimc->vid_cap.ctx);
}
- return v4l2_fh_release(file);
+
+ ret = v4l2_fh_release(file);
+
+ mutex_unlock(&fimc->lock);
+ return ret;
}
static unsigned int fimc_capture_poll(struct file *file,
struct poll_table_struct *wait)
{
struct fimc_dev *fimc = video_drvdata(file);
+ int ret;
- return vb2_poll(&fimc->vid_cap.vbq, file, wait);
+ if (mutex_lock_interruptible(&fimc->lock))
+ return POLL_ERR;
+
+ ret = vb2_poll(&fimc->vid_cap.vbq, file, wait);
+ mutex_unlock(&fimc->lock);
+
+ return ret;
}
static int fimc_capture_mmap(struct file *file, struct vm_area_struct *vma)
{
struct fimc_dev *fimc = video_drvdata(file);
+ int ret;
- return vb2_mmap(&fimc->vid_cap.vbq, vma);
+ if (mutex_lock_interruptible(&fimc->lock))
+ return -ERESTARTSYS;
+
+ ret = vb2_mmap(&fimc->vid_cap.vbq, vma);
+ mutex_unlock(&fimc->lock);
+
+ return ret;
}
static const struct v4l2_file_operations fimc_capture_fops = {
@@ -1589,10 +1618,7 @@
vfd->minor = -1;
vfd->release = video_device_release;
vfd->lock = &fimc->lock;
- /* 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);
+
video_set_drvdata(vfd, fimc);
vid_cap = &fimc->vid_cap;
