media: atomisp: check before deference asd variable

The asd->isp was referenced before checking if asd is not
NULL.

This fixes this warning:

	../drivers/staging/media/atomisp/pci/atomisp_cmd.c:5548 atomisp_set_fmt_to_snr() warn: variable dereferenced before check 'asd' (see line 5540)

While here, avoid getting the pipe pointer twice.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/staging/media/atomisp/pci/atomisp_cmd.c b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
index 4ef5d72..43e266f 100644 (file)
--- a/drivers/staging/media/atomisp/pci/atomisp_cmd.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
@@ -5525,8 +5525,8 @@ static int atomisp_set_fmt_to_snr(struct video_device *vdev,
                                  unsigned int padding_w, unsigned int padding_h,
                                  unsigned int dvs_env_w, unsigned int dvs_env_h)
 {
-       struct atomisp_sub_device *asd = atomisp_to_video_pipe(vdev)->asd;
        struct atomisp_video_pipe *pipe = atomisp_to_video_pipe(vdev);
+       struct atomisp_sub_device *asd = pipe->asd;
        const struct atomisp_format_bridge *format;
        struct v4l2_subdev_pad_config pad_cfg;
        struct v4l2_subdev_state pad_state = {
@@ -5537,7 +5537,7 @@ static int atomisp_set_fmt_to_snr(struct video_device *vdev,
        };
        struct v4l2_mbus_framefmt *ffmt = &vformat.format;
        struct v4l2_mbus_framefmt *req_ffmt;
-       struct atomisp_device *isp = asd->isp;
+       struct atomisp_device *isp;
        struct atomisp_input_stream_info *stream_info =
            (struct atomisp_input_stream_info *)ffmt->reserved;
        u16 stream_index = ATOMISP_INPUT_STREAM_GENERAL;
@@ -5551,6 +5551,8 @@ static int atomisp_set_fmt_to_snr(struct video_device *vdev,
                return -EINVAL;
        }
 
+       isp = asd->isp;
+
        v4l2_fh_init(&fh.vfh, vdev);
 
        stream_index = atomisp_source_pad_to_stream_id(asd, source_pad);