media: atomisp: fix "variable dereferenced before check 'asd'"

There are two occurrences where the variable 'asd' is dereferenced
before check. Fix this issue by using the variable after the check.

Link: https://lore.kernel.org/linux-media/20211122074122.GA6581@kili/

Link: https://lore.kernel.org/linux-media/20211201141904.47231-1-kitakar@gmail.comReported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_cmd.c

@@ -5185,7 +5185,7 @@ static int atomisp_set_fmt_to_isp(struct video_device *vdev,
 	int (*configure_pp_input)(struct atomisp_sub_device *asd,
 				  unsigned int width, unsigned int height) =
 				      configure_pp_input_nop;
-	u16 stream_index = atomisp_source_pad_to_stream_id(asd, source_pad);
+	u16 stream_index;
 	const struct atomisp_in_fmt_conv *fc;
 	int ret, i;
 
@@ -5194,6 +5194,7 @@ static int atomisp_set_fmt_to_isp(struct video_device *vdev,
 			__func__, vdev->name);
 		return -EINVAL;
 	}
+	stream_index = atomisp_source_pad_to_stream_id(asd, source_pad);
 
 	v4l2_fh_init(&fh.vfh, vdev);
 

drivers/staging/media/atomisp/pci/atomisp_ioctl.c

@@ -1182,7 +1182,7 @@ int __atomisp_reqbufs(struct file *file, void *fh,
 	struct ia_css_frame *frame;
 	struct videobuf_vmalloc_memory *vm_mem;
 	u16 source_pad = atomisp_subdev_source_pad(vdev);
-	u16 stream_id = atomisp_source_pad_to_stream_id(asd, source_pad);
+	u16 stream_id;
 	int ret = 0, i = 0;
 
 	if (!asd) {
@@ -1190,6 +1190,7 @@ int __atomisp_reqbufs(struct file *file, void *fh,
 			__func__, vdev->name);
 		return -EINVAL;
 	}
+	stream_id = atomisp_source_pad_to_stream_id(asd, source_pad);
 
 	if (req->count == 0) {
 		mutex_lock(&pipe->capq.vb_lock);