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author | Sylwester Nawrocki <s.nawrocki@samsung.com> | 2012-06-27 09:56:17 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-07-30 19:22:44 -0300 |
commit | c2d430af08f38a0b3145c3b60381146b8ac88c88 (patch) | |
tree | a63e00cf263b47d7c9e8648cc5af27d8c74b0184 /drivers/media | |
parent | 837c7e4256d5285700fe0d500eeb15801b55bb0e (diff) | |
download | op-kernel-dev-c2d430af08f38a0b3145c3b60381146b8ac88c88.zip op-kernel-dev-c2d430af08f38a0b3145c3b60381146b8ac88c88.tar.gz |
[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>
Diffstat (limited to 'drivers/media')
-rw-r--r-- | drivers/media/video/s5p-fimc/fimc-capture.c | 78 | ||||
-rw-r--r-- | drivers/media/video/s5p-fimc/fimc-m2m.c | 45 |
2 files changed, 87 insertions, 36 deletions
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_set_default_format(struct fimc_dev *fimc); 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; + if (ret) { + pm_runtime_put(&fimc->pdev->dev); + goto unlock; + } - ret = fimc_pipeline_initialize(&fimc->pipeline, + if (++fimc->vid_cap.refcnt == 1) { + 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; - } - ret = fimc_capture_ctrls_create(fimc); - if (!ret && !fimc->vid_cap.user_subdev_api) - ret = fimc_capture_set_default_format(fimc); + 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 @@ static int fimc_capture_close(struct file *file) 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; + + if (mutex_lock_interruptible(&fimc->lock)) + return -ERESTARTSYS; - return vb2_mmap(&fimc->vid_cap.vbq, vma); + 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 @@ static int fimc_register_capture_device(struct fimc_dev *fimc, 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; diff --git a/drivers/media/video/s5p-fimc/fimc-m2m.c b/drivers/media/video/s5p-fimc/fimc-m2m.c index 4c58e05..41eda2e 100644 --- a/drivers/media/video/s5p-fimc/fimc-m2m.c +++ b/drivers/media/video/s5p-fimc/fimc-m2m.c @@ -642,21 +642,25 @@ static int fimc_m2m_open(struct file *file) { struct fimc_dev *fimc = video_drvdata(file); struct fimc_ctx *ctx; - int ret; + int ret = -EBUSY; dbg("pid: %d, state: 0x%lx, refcnt: %d", task_pid_nr(current), fimc->state, fimc->vid_cap.refcnt); + if (mutex_lock_interruptible(&fimc->lock)) + return -ERESTARTSYS; /* * Return if the corresponding video capture node * is already opened. */ if (fimc->vid_cap.refcnt > 0) - return -EBUSY; + goto unlock; ctx = kzalloc(sizeof *ctx, GFP_KERNEL); - if (!ctx) - return -ENOMEM; + if (!ctx) { + ret = -ENOMEM; + goto unlock; + } v4l2_fh_init(&ctx->fh, fimc->m2m.vfd); ctx->fimc_dev = fimc; @@ -687,6 +691,8 @@ static int fimc_m2m_open(struct file *file) if (fimc->m2m.refcnt++ == 0) set_bit(ST_M2M_RUN, &fimc->state); + + mutex_unlock(&fimc->lock); return 0; error_c: @@ -695,6 +701,8 @@ error_fh: v4l2_fh_del(&ctx->fh); v4l2_fh_exit(&ctx->fh); kfree(ctx); +unlock: + mutex_unlock(&fimc->lock); return ret; } @@ -706,6 +714,9 @@ static int fimc_m2m_release(struct file *file) dbg("pid: %d, state: 0x%lx, refcnt= %d", task_pid_nr(current), fimc->state, fimc->m2m.refcnt); + if (mutex_lock_interruptible(&fimc->lock)) + return -ERESTARTSYS; + v4l2_m2m_ctx_release(ctx->m2m_ctx); fimc_ctrls_delete(ctx); v4l2_fh_del(&ctx->fh); @@ -714,6 +725,8 @@ static int fimc_m2m_release(struct file *file) if (--fimc->m2m.refcnt <= 0) clear_bit(ST_M2M_RUN, &fimc->state); kfree(ctx); + + mutex_unlock(&fimc->lock); return 0; } @@ -721,16 +734,32 @@ static unsigned int fimc_m2m_poll(struct file *file, struct poll_table_struct *wait) { struct fimc_ctx *ctx = fh_to_ctx(file->private_data); + struct fimc_dev *fimc = ctx->fimc_dev; + int ret; - return v4l2_m2m_poll(file, ctx->m2m_ctx, wait); + if (mutex_lock_interruptible(&fimc->lock)) + return -ERESTARTSYS; + + ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); + mutex_unlock(&fimc->lock); + + return ret; } static int fimc_m2m_mmap(struct file *file, struct vm_area_struct *vma) { struct fimc_ctx *ctx = fh_to_ctx(file->private_data); + struct fimc_dev *fimc = ctx->fimc_dev; + int ret; + + if (mutex_lock_interruptible(&fimc->lock)) + return -ERESTARTSYS; - return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); + ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); + mutex_unlock(&fimc->lock); + + return ret; } static const struct v4l2_file_operations fimc_m2m_fops = { @@ -772,10 +801,6 @@ int fimc_register_m2m_device(struct fimc_dev *fimc, 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); snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id); video_set_drvdata(vfd, fimc); |