[media] s5p-fimc: Use v4l core mutex in ioctl and file operations
authorSylwester Nawrocki <s.nawrocki@samsung.com>
Wed, 1 Dec 2010 13:25:18 +0000 (10:25 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Mon, 21 Mar 2011 23:31:36 +0000 (20:31 -0300)
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>
drivers/media/video/s5p-fimc/fimc-capture.c
drivers/media/video/s5p-fimc/fimc-core.c

index e746b684c3b897a5c7d7195bb72a795a3f17cf32..3b208f8325ae28d79498acff1bbf3ab7a372d911 100644 (file)
@@ -406,29 +406,23 @@ static int fimc_capture_open(struct file *file)
        if (fimc_m2m_active(fimc))
                return -EBUSY;
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
-
        if (++fimc->vid_cap.refcnt == 1) {
                ret = fimc_isp_subdev_init(fimc, -1);
                if (ret) {
                        fimc->vid_cap.refcnt--;
-                       ret = -EIO;
+                       return -EIO;
                }
        }
 
        file->private_data = fimc->vid_cap.ctx;
 
-       mutex_unlock(&fimc->lock);
-       return ret;
+       return 0;
 }
 
 static int fimc_capture_close(struct file *file)
 {
        struct fimc_dev *fimc = video_drvdata(file);
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
        dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
 
        if (--fimc->vid_cap.refcnt == 0) {
@@ -441,7 +435,6 @@ static int fimc_capture_close(struct file *file)
                fimc_subdev_unregister(fimc);
        }
 
-       mutex_unlock(&fimc->lock);
        return 0;
 }
 
@@ -450,30 +443,16 @@ static unsigned int fimc_capture_poll(struct file *file,
 {
        struct fimc_ctx *ctx = file->private_data;
        struct fimc_dev *fimc = ctx->fimc_dev;
-       int ret;
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return POLLERR;
-
-       ret = vb2_poll(&fimc->vid_cap.vbq, file, wait);
-       mutex_unlock(&fimc->lock);
-
-       return ret;
+       return vb2_poll(&fimc->vid_cap.vbq, file, wait);
 }
 
 static int fimc_capture_mmap(struct file *file, struct vm_area_struct *vma)
 {
        struct fimc_ctx *ctx = file->private_data;
        struct fimc_dev *fimc = ctx->fimc_dev;
-       int ret;
-
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
 
-       ret = vb2_mmap(&fimc->vid_cap.vbq, vma);
-       mutex_unlock(&fimc->lock);
-
-       return ret;
+       return vb2_mmap(&fimc->vid_cap.vbq, vma);
 }
 
 /* video device file operations */
@@ -555,13 +534,6 @@ static int fimc_cap_s_fmt_mplane(struct file *file, void *priv,
        if (ret)
                return ret;
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
-
-       if (fimc_capture_active(fimc)) {
-               ret = -EBUSY;
-               goto sf_unlock;
-       }
        if (vb2_is_streaming(&fimc->vid_cap.vbq) || fimc_capture_active(fimc))
                return -EBUSY;
 
@@ -571,8 +543,7 @@ static int fimc_cap_s_fmt_mplane(struct file *file, void *priv,
        frame->fmt = find_format(f, FMT_FLAGS_M2M | FMT_FLAGS_CAM);
        if (!frame->fmt) {
                err("fimc target format not found\n");
-               ret = -EINVAL;
-               goto sf_unlock;
+               return -EINVAL;
        }
 
        for (i = 0; i < frame->fmt->colplanes; i++)
@@ -589,12 +560,9 @@ static int fimc_cap_s_fmt_mplane(struct file *file, void *priv,
        frame->offs_h   = 0;
        frame->offs_v   = 0;
 
-       ret = sync_capture_fmt(ctx);
-
        ctx->state |= (FIMC_PARAMS | FIMC_DST_FMT);
 
-sf_unlock:
-       mutex_unlock(&fimc->lock);
+       ret = sync_capture_fmt(ctx);
        return ret;
 }
 
@@ -623,21 +591,16 @@ static int fimc_cap_s_input(struct file *file, void *priv,
        struct fimc_ctx *ctx = priv;
        struct fimc_dev *fimc = ctx->fimc_dev;
        struct s3c_platform_fimc *pdata = fimc->pdata;
-       int ret;
 
        if (fimc_capture_active(ctx->fimc_dev))
                return -EBUSY;
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
+       if (i >= FIMC_MAX_CAMIF_CLIENTS || !pdata->isp_info[i])
+               return -EINVAL;
 
-       if (i >= FIMC_MAX_CAMIF_CLIENTS || !pdata->isp_info[i]) {
-               ret = -EINVAL;
-               goto si_unlock;
-       }
 
        if (fimc->vid_cap.sd) {
-               ret = v4l2_subdev_call(fimc->vid_cap.sd, core, s_power, 0);
+               int ret = v4l2_subdev_call(fimc->vid_cap.sd, core, s_power, 0);
                if (ret)
                        err("s_power failed: %d", ret);
        }
@@ -645,11 +608,7 @@ static int fimc_cap_s_input(struct file *file, void *priv,
        /* Release the attached sensor subdevice. */
        fimc_subdev_unregister(fimc);
 
-       ret = fimc_isp_subdev_init(fimc, i);
-
-si_unlock:
-       mutex_unlock(&fimc->lock);
-       return ret;
+       return fimc_isp_subdev_init(fimc, i);
 }
 
 static int fimc_cap_g_input(struct file *file, void *priv,
@@ -665,112 +624,41 @@ static int fimc_cap_g_input(struct file *file, void *priv,
 static int fimc_cap_streamon(struct file *file, void *priv,
                             enum v4l2_buf_type type)
 {
-       struct s3c_fimc_isp_info *isp_info;
        struct fimc_ctx *ctx = priv;
        struct fimc_dev *fimc = ctx->fimc_dev;
-       int ret = -EBUSY;
-
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
 
        if (fimc_capture_active(fimc) || !fimc->vid_cap.sd)
-               goto s_unlock;
+               return -EBUSY;
 
        if (!(ctx->state & FIMC_DST_FMT)) {
                v4l2_err(&fimc->vid_cap.v4l2_dev, "Format is not set\n");
-               ret = -EINVAL;
-               goto s_unlock;
-       }
-
-       ret = v4l2_subdev_call(fimc->vid_cap.sd, video, s_stream, 1);
-       if (ret && ret != -ENOIOCTLCMD)
-               goto s_unlock;
-
-       ret = fimc_prepare_config(ctx, ctx->state);
-       if (ret)
-               goto s_unlock;
-
-       isp_info = fimc->pdata->isp_info[fimc->vid_cap.input_index];
-       fimc_hw_set_camera_type(fimc, isp_info);
-       fimc_hw_set_camera_source(fimc, isp_info);
-       fimc_hw_set_camera_offset(fimc, &ctx->s_frame);
-
-       if (ctx->state & FIMC_PARAMS) {
-               ret = fimc_set_scaler_info(ctx);
-               if (ret) {
-                       err("Scaler setup error");
-                       goto s_unlock;
-               }
-               fimc_hw_set_input_path(ctx);
-               fimc_hw_set_scaler(ctx);
-               fimc_hw_set_target_format(ctx);
-               fimc_hw_set_rotation(ctx);
-               fimc_hw_set_effect(ctx);
+               return -EINVAL;
        }
 
-       fimc_hw_set_output_path(ctx);
-       fimc_hw_set_out_dma(ctx);
-
-       INIT_LIST_HEAD(&fimc->vid_cap.pending_buf_q);
-       INIT_LIST_HEAD(&fimc->vid_cap.active_buf_q);
-       fimc->vid_cap.active_buf_cnt = 0;
-       fimc->vid_cap.frame_count = 0;
-       fimc->vid_cap.buf_index = fimc_hw_get_frame_index(fimc);
-
-       set_bit(ST_CAPT_PEND, &fimc->state);
-       ret = vb2_streamon(&fimc->vid_cap.vbq, type);
-
-s_unlock:
-       mutex_unlock(&fimc->lock);
-       return ret;
+       return vb2_streamon(&fimc->vid_cap.vbq, type);
 }
 
 static int fimc_cap_streamoff(struct file *file, void *priv,
-                             enum v4l2_buf_type type)
+                           enum v4l2_buf_type type)
 {
        struct fimc_ctx *ctx = priv;
        struct fimc_dev *fimc = ctx->fimc_dev;
-       struct fimc_vid_cap *cap = &fimc->vid_cap;
-       unsigned long flags;
-       int ret;
-
-       spin_lock_irqsave(&fimc->slock, flags);
-       if (!fimc_capture_running(fimc) && !fimc_capture_pending(fimc)) {
-               spin_unlock_irqrestore(&fimc->slock, flags);
-               dbg("state: 0x%lx", fimc->state);
-               return -EINVAL;
-       }
-       spin_unlock_irqrestore(&fimc->slock, flags);
-
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
 
-       fimc_stop_capture(fimc);
-       ret = vb2_streamoff(&cap->vbq, type);
-
-       mutex_unlock(&fimc->lock);
-       return ret;
+       return vb2_streamoff(&fimc->vid_cap.vbq, type);
 }
 
 static int fimc_cap_reqbufs(struct file *file, void *priv,
                            struct v4l2_requestbuffers *reqbufs)
 {
        struct fimc_ctx *ctx = priv;
-       struct fimc_dev *fimc = ctx->fimc_dev;
-       struct fimc_vid_cap *cap = &fimc->vid_cap;
+       struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
        int ret;
 
-       if (fimc_capture_active(ctx->fimc_dev))
-               return -EBUSY;
-
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
 
        ret = vb2_reqbufs(&cap->vbq, reqbufs);
        if (!ret)
                cap->reqbufs_count = reqbufs->count;
 
-       mutex_unlock(&fimc->lock);
        return ret;
 }
 
@@ -780,9 +668,6 @@ static int fimc_cap_querybuf(struct file *file, void *priv,
        struct fimc_ctx *ctx = priv;
        struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
 
-       if (fimc_capture_active(ctx->fimc_dev))
-               return -EBUSY;
-
        return vb2_querybuf(&cap->vbq, buf);
 }
 
@@ -790,33 +675,16 @@ static int fimc_cap_qbuf(struct file *file, void *priv,
                          struct v4l2_buffer *buf)
 {
        struct fimc_ctx *ctx = priv;
-       struct fimc_dev *fimc = ctx->fimc_dev;
-       struct fimc_vid_cap *cap = &fimc->vid_cap;
-       int ret;
-
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
-
-       ret = vb2_qbuf(&cap->vbq, buf);
-
-       mutex_unlock(&fimc->lock);
-       return ret;
+       struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
+       return vb2_qbuf(&cap->vbq, buf);
 }
 
 static int fimc_cap_dqbuf(struct file *file, void *priv,
                           struct v4l2_buffer *buf)
 {
        struct fimc_ctx *ctx = priv;
-       int ret;
-
-       if (mutex_lock_interruptible(&ctx->fimc_dev->lock))
-               return -ERESTARTSYS;
-
-       ret = vb2_dqbuf(&ctx->fimc_dev->vid_cap.vbq, buf,
+       return vb2_dqbuf(&ctx->fimc_dev->vid_cap.vbq, buf,
                file->f_flags & O_NONBLOCK);
-
-       mutex_unlock(&ctx->fimc_dev->lock);
-       return ret;
 }
 
 static int fimc_cap_s_ctrl(struct file *file, void *priv,
@@ -825,9 +693,6 @@ static int fimc_cap_s_ctrl(struct file *file, void *priv,
        struct fimc_ctx *ctx = priv;
        int ret = -EINVAL;
 
-       if (mutex_lock_interruptible(&ctx->fimc_dev->lock))
-               return -ERESTARTSYS;
-
        /* Allow any controls but 90/270 rotation while streaming */
        if (!fimc_capture_active(ctx->fimc_dev) ||
            ctrl->id != V4L2_CID_ROTATE ||
@@ -842,8 +707,6 @@ static int fimc_cap_s_ctrl(struct file *file, void *priv,
        if (ret == -EINVAL)
                ret = v4l2_subdev_call(ctx->fimc_dev->vid_cap.sd,
                                       core, s_ctrl, ctrl);
-
-       mutex_unlock(&ctx->fimc_dev->lock);
        return ret;
 }
 
@@ -852,13 +715,10 @@ static int fimc_cap_cropcap(struct file *file, void *fh,
 {
        struct fimc_frame *f;
        struct fimc_ctx *ctx = fh;
-       struct fimc_dev *fimc = ctx->fimc_dev;
 
        if (cr->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
                return -EINVAL;
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
        f = &ctx->s_frame;
 
        cr->bounds.left         = 0;
@@ -867,7 +727,6 @@ static int fimc_cap_cropcap(struct file *file, void *fh,
        cr->bounds.height       = f->o_height;
        cr->defrect             = cr->bounds;
 
-       mutex_unlock(&fimc->lock);
        return 0;
 }
 
@@ -875,19 +734,14 @@ static int fimc_cap_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
 {
        struct fimc_frame *f;
        struct fimc_ctx *ctx = file->private_data;
-       struct fimc_dev *fimc = ctx->fimc_dev;
-
-
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
 
        f = &ctx->s_frame;
+
        cr->c.left      = f->offs_h;
        cr->c.top       = f->offs_v;
        cr->c.width     = f->width;
        cr->c.height    = f->height;
 
-       mutex_unlock(&fimc->lock);
        return 0;
 }
 
@@ -906,13 +760,10 @@ static int fimc_cap_s_crop(struct file *file, void *fh,
        if (ret)
                return ret;
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
-
        if (!(ctx->state & FIMC_DST_FMT)) {
                v4l2_err(&fimc->vid_cap.v4l2_dev,
                         "Capture color format not set\n");
-               goto sc_unlock;
+               return -EINVAL; /* TODO: make sure this is the right value */
        }
 
        f = &ctx->s_frame;
@@ -920,17 +771,15 @@ static int fimc_cap_s_crop(struct file *file, void *fh,
        ret = fimc_check_scaler_ratio(&cr->c, &ctx->d_frame);
        if (ret) {
                v4l2_err(&fimc->vid_cap.v4l2_dev, "Out of the scaler range");
-       } else {
-               ret = 0;
-               f->offs_h = cr->c.left;
-               f->offs_v = cr->c.top;
-               f->width  = cr->c.width;
-               f->height = cr->c.height;
+               return ret;
        }
 
-sc_unlock:
-       mutex_unlock(&fimc->lock);
-       return ret;
+       f->offs_h = cr->c.left;
+       f->offs_v = cr->c.top;
+       f->width  = cr->c.width;
+       f->height = cr->c.height;
+
+       return 0;
 }
 
 
@@ -1013,6 +862,7 @@ int fimc_register_capture_device(struct fimc_dev *fimc)
        vfd->ioctl_ops  = &fimc_capture_ioctl_ops;
        vfd->minor      = -1;
        vfd->release    = video_device_release;
+       vfd->lock       = &fimc->lock;
        video_set_drvdata(vfd, fimc);
 
        vid_cap = &fimc->vid_cap;
index fe210976f30bd7f32ded3fe2a8eaacb9904b9c99..9ebb92530053096038a43fc6836c7fde28557bb6 100644 (file)
@@ -741,22 +741,17 @@ int fimc_vidioc_g_fmt_mplane(struct file *file, void *priv,
                             struct v4l2_format *f)
 {
        struct fimc_ctx *ctx = priv;
-       struct fimc_dev *fimc = ctx->fimc_dev;
        struct fimc_frame *frame;
 
        frame = ctx_get_frame(ctx, f->type);
        if (IS_ERR(frame))
                return PTR_ERR(frame);
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
-
        f->fmt.pix.width        = frame->width;
        f->fmt.pix.height       = frame->height;
        f->fmt.pix.field        = V4L2_FIELD_NONE;
        f->fmt.pix.pixelformat  = frame->fmt->fourcc;
 
-       mutex_unlock(&fimc->lock);
        return 0;
 }
 
@@ -800,7 +795,8 @@ int fimc_vidioc_try_fmt_mplane(struct file *file, void *priv,
        struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
        struct fimc_fmt *fmt;
        u32 max_width, mod_x, mod_y, mask;
-       int ret, i, is_output = 0;
+       int i, is_output = 0;
+
 
        if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
                if (ctx->state & FIMC_CTX_CAP)
@@ -810,8 +806,6 @@ int fimc_vidioc_try_fmt_mplane(struct file *file, void *priv,
                return -EINVAL;
        }
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
        dbg("w: %d, h: %d", pix->width, pix->height);
 
        mask = is_output ? FMT_FLAGS_M2M : FMT_FLAGS_M2M | FMT_FLAGS_CAM;
@@ -819,13 +813,13 @@ int fimc_vidioc_try_fmt_mplane(struct file *file, void *priv,
        if (!fmt) {
                v4l2_err(&fimc->m2m.v4l2_dev, "Fourcc format (0x%X) invalid.\n",
                         pix->pixelformat);
-               goto tf_out;
+               return -EINVAL;
        }
 
        if (pix->field == V4L2_FIELD_ANY)
                pix->field = V4L2_FIELD_NONE;
        else if (V4L2_FIELD_NONE != pix->field)
-               goto tf_out;
+               return -EINVAL;
 
        if (is_output) {
                max_width = variant->pix_limit->scaler_dis_w;
@@ -871,11 +865,7 @@ int fimc_vidioc_try_fmt_mplane(struct file *file, void *priv,
                    pix->plane_fmt[i].sizeimage);
        }
 
-       ret = 0;
-
-tf_out:
-       mutex_unlock(&fimc->lock);
-       return ret;
+       return 0;
 }
 
 static int fimc_m2m_s_fmt_mplane(struct file *file, void *priv,
@@ -888,45 +878,33 @@ static int fimc_m2m_s_fmt_mplane(struct file *file, void *priv,
        struct v4l2_pix_format_mplane *pix;
        unsigned long flags;
        int i, ret = 0;
+       u32 tmp;
 
        ret = fimc_vidioc_try_fmt_mplane(file, priv, f);
        if (ret)
                return ret;
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
-
        vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
 
        if (vb2_is_streaming(vq)) {
-               v4l2_err(&fimc->vid_cap.v4l2_dev, "%s: queue (%d) busy\n",
-                        __func__, f->type);
-               ret = -EBUSY;
-               goto sf_out;
+               v4l2_err(&fimc->m2m.v4l2_dev, "queue (%d) busy\n", f->type);
+               return -EBUSY;
        }
 
-       spin_lock_irqsave(&ctx->slock, flags);
        if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
                frame = &ctx->s_frame;
-               ctx->state |= FIMC_SRC_FMT;
        } else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
                frame = &ctx->d_frame;
-               ctx->state |= FIMC_DST_FMT;
        } else {
-               spin_unlock_irqrestore(&ctx->slock, flags);
                v4l2_err(&fimc->m2m.v4l2_dev,
                         "Wrong buffer/video queue type (%d)\n", f->type);
-               ret = -EINVAL;
-               goto sf_out;
+               return -EINVAL;
        }
-       spin_unlock_irqrestore(&ctx->slock, flags);
 
        pix = &f->fmt.pix_mp;
        frame->fmt = find_format(f, FMT_FLAGS_M2M);
-       if (!frame->fmt) {
-               ret = -EINVAL;
-               goto sf_out;
-       }
+       if (!frame->fmt)
+               return -EINVAL;
 
        for (i = 0; i < frame->fmt->colplanes; i++)
                frame->payload[i] = pix->plane_fmt[i].bytesperline * pix->height;
@@ -942,14 +920,13 @@ static int fimc_m2m_s_fmt_mplane(struct file *file, void *priv,
        frame->offs_v   = 0;
 
        spin_lock_irqsave(&ctx->slock, flags);
-       ctx->state |= FIMC_PARAMS;
+       tmp = (frame == &ctx->d_frame) ? FIMC_DST_FMT : FIMC_SRC_FMT;
+       ctx->state |= FIMC_PARAMS | tmp;
        spin_unlock_irqrestore(&ctx->slock, flags);
 
        dbg("f_w: %d, f_h: %d", frame->f_width, frame->f_height);
 
-sf_out:
-       mutex_unlock(&fimc->lock);
-       return ret;
+       return 0;
 }
 
 static int fimc_m2m_reqbufs(struct file *file, void *priv,
@@ -1018,11 +995,8 @@ int fimc_vidioc_queryctrl(struct file *file, void *priv,
        }
 
        if (ctx->state & FIMC_CTX_CAP) {
-               if (mutex_lock_interruptible(&ctx->fimc_dev->lock))
-                       return -ERESTARTSYS;
-               ret = v4l2_subdev_call(ctx->fimc_dev->vid_cap.sd,
+               return v4l2_subdev_call(ctx->fimc_dev->vid_cap.sd,
                                        core, queryctrl, qc);
-               mutex_unlock(&ctx->fimc_dev->lock);
        }
        return ret;
 }
@@ -1032,10 +1006,6 @@ int fimc_vidioc_g_ctrl(struct file *file, void *priv,
 {
        struct fimc_ctx *ctx = priv;
        struct fimc_dev *fimc = ctx->fimc_dev;
-       int ret = 0;
-
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
 
        switch (ctrl->id) {
        case V4L2_CID_HFLIP:
@@ -1049,18 +1019,17 @@ int fimc_vidioc_g_ctrl(struct file *file, void *priv,
                break;
        default:
                if (ctx->state & FIMC_CTX_CAP) {
-                       ret = v4l2_subdev_call(fimc->vid_cap.sd, core,
-                                      g_ctrl, ctrl);
+                       return v4l2_subdev_call(fimc->vid_cap.sd, core,
+                                               g_ctrl, ctrl);
                } else {
                        v4l2_err(&fimc->m2m.v4l2_dev,
                                 "Invalid control\n");
-                       ret = -EINVAL;
+                       return -EINVAL;
                }
        }
        dbg("ctrl->value= %d", ctrl->value);
 
-       mutex_unlock(&fimc->lock);
-       return ret;
+       return 0;
 }
 
 int check_ctrl_val(struct fimc_ctx *ctx,  struct v4l2_control *ctrl)
@@ -1151,22 +1120,17 @@ static int fimc_m2m_cropcap(struct file *file, void *fh,
 {
        struct fimc_frame *frame;
        struct fimc_ctx *ctx = fh;
-       struct fimc_dev *fimc = ctx->fimc_dev;
 
        frame = ctx_get_frame(ctx, cr->type);
        if (IS_ERR(frame))
                return PTR_ERR(frame);
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
-
        cr->bounds.left         = 0;
        cr->bounds.top          = 0;
        cr->bounds.width        = frame->f_width;
        cr->bounds.height       = frame->f_height;
        cr->defrect             = cr->bounds;
 
-       mutex_unlock(&fimc->lock);
        return 0;
 }
 
@@ -1174,21 +1138,16 @@ static int fimc_m2m_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
 {
        struct fimc_frame *frame;
        struct fimc_ctx *ctx = file->private_data;
-       struct fimc_dev *fimc = ctx->fimc_dev;
 
        frame = ctx_get_frame(ctx, cr->type);
        if (IS_ERR(frame))
                return PTR_ERR(frame);
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
-
        cr->c.left = frame->offs_h;
        cr->c.top = frame->offs_v;
        cr->c.width = frame->width;
        cr->c.height = frame->height;
 
-       mutex_unlock(&fimc->lock);
        return 0;
 }
 
@@ -1268,9 +1227,6 @@ static int fimc_m2m_s_crop(struct file *file, void *fh, struct v4l2_crop *cr)
        f = (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
                &ctx->s_frame : &ctx->d_frame;
 
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
-
        spin_lock_irqsave(&ctx->slock, flags);
        if (~ctx->state & (FIMC_SRC_FMT | FIMC_DST_FMT)) {
                /* Check to see if scaling ratio is within supported range */
@@ -1280,8 +1236,8 @@ static int fimc_m2m_s_crop(struct file *file, void *fh, struct v4l2_crop *cr)
                        ret = fimc_check_scaler_ratio(&cr->c, &ctx->s_frame);
                if (ret) {
                        v4l2_err(&fimc->m2m.v4l2_dev, "Out of scaler range");
-                       ret = -EINVAL;
-                       goto scr_unlock;
+                       spin_unlock_irqrestore(&ctx->slock, flags);
+                       return -EINVAL;
                }
        }
        ctx->state |= FIMC_PARAMS;
@@ -1291,9 +1247,7 @@ static int fimc_m2m_s_crop(struct file *file, void *fh, struct v4l2_crop *cr)
        f->width  = cr->c.width;
        f->height = cr->c.height;
 
-scr_unlock:
        spin_unlock_irqrestore(&ctx->slock, flags);
-       mutex_unlock(&fimc->lock);
        return 0;
 }
 
@@ -1364,10 +1318,6 @@ static int fimc_m2m_open(struct file *file)
 {
        struct fimc_dev *fimc = video_drvdata(file);
        struct fimc_ctx *ctx = NULL;
-       int err = 0;
-
-       if (mutex_lock_interruptible(&fimc->lock))
-               return -ERESTARTSYS;
 
        dbg("pid: %d, state: 0x%lx, refcnt: %d",
                task_pid_nr(current), fimc->state, fimc->vid_cap.refcnt);
@@ -1376,19 +1326,15 @@ static int fimc_m2m_open(struct file *file)
         * Return if the corresponding video capture node
         * is already opened.
         */
-       if (fimc->vid_cap.refcnt > 0) {
-               err = -EBUSY;
-               goto err_unlock;
-       }
+       if (fimc->vid_cap.refcnt > 0)
+               return -EBUSY;
 
        fimc->m2m.refcnt++;
        set_bit(ST_OUTDMA_RUN, &fimc->state);
 
        ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
-       if (!ctx) {
-               err = -ENOMEM;
-               goto err_unlock;
-       }
+       if (!ctx)
+               return -ENOMEM;
 
        file->private_data = ctx;
        ctx->fimc_dev = fimc;
@@ -1404,13 +1350,12 @@ static int fimc_m2m_open(struct file *file)
 
        ctx->m2m_ctx = v4l2_m2m_ctx_init(fimc->m2m.m2m_dev, ctx, queue_init);
        if (IS_ERR(ctx->m2m_ctx)) {
-               err = PTR_ERR(ctx->m2m_ctx);
+               int err = PTR_ERR(ctx->m2m_ctx);
                kfree(ctx);
+               return err;
        }
 
-err_unlock:
-       mutex_unlock(&fimc->lock);
-       return err;
+       return 0;
 }
 
 static int fimc_m2m_release(struct file *file)
@@ -1418,8 +1363,6 @@ static int fimc_m2m_release(struct file *file)
        struct fimc_ctx *ctx = file->private_data;
        struct fimc_dev *fimc = ctx->fimc_dev;
 
-       mutex_lock(&fimc->lock);
-
        dbg("pid: %d, state: 0x%lx, refcnt= %d",
                task_pid_nr(current), fimc->state, fimc->m2m.refcnt);
 
@@ -1428,7 +1371,6 @@ static int fimc_m2m_release(struct file *file)
        if (--fimc->m2m.refcnt <= 0)
                clear_bit(ST_OUTDMA_RUN, &fimc->state);
 
-       mutex_unlock(&fimc->lock);
        return 0;
 }
 
@@ -1494,6 +1436,7 @@ static int fimc_register_m2m_device(struct fimc_dev *fimc)
        vfd->ioctl_ops  = &fimc_m2m_ioctl_ops;
        vfd->minor      = -1;
        vfd->release    = video_device_release;
+       vfd->lock       = &fimc->lock;
 
        snprintf(vfd->name, sizeof(vfd->name), "%s:m2m", dev_name(&pdev->dev));