media: atomisp: make atomisp_css_continuous_set_num_raw_frames() void

The return value of atomisp_css_continuous_set_num_raw_frames() function
is always 0, so there's no reason for a return value. In addition, the
__enable_continuous_mode() checked the return value for possible error
which is unnecessary. Convert atomisp_css_continuous_set_num_raw_frames()
to a void function.

Link: https://lore.kernel.org/linux-media/1605362150-11401-1-git-send-email-kaixuxia@tencent.comReported-by: Tosk Robot <tencent_os_robot@tencent.com>
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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

@@ -5083,11 +5083,8 @@ static int __enable_continuous_mode(struct atomisp_sub_device *asd,
 	atomisp_css_enable_continuous(asd, enable);
 	atomisp_css_enable_cvf(asd, asd->continuous_viewfinder->val);
 
-	if (atomisp_css_continuous_set_num_raw_frames(asd,
-		asd->continuous_raw_buffer_size->val)) {
-		dev_err(isp->dev, "css_continuous_set_num_raw_frames failed\n");
-		return -EINVAL;
-	}
+	atomisp_css_continuous_set_num_raw_frames(asd,
+		asd->continuous_raw_buffer_size->val);
 
 	if (!enable) {
 		atomisp_css_enable_raw_binning(asd, false);

drivers/staging/media/atomisp/pci/atomisp_compat.h

@@ -250,9 +250,9 @@ void atomisp_destroy_pipes_stream_force(struct atomisp_sub_device *asd);
 void atomisp_css_stop(struct atomisp_sub_device *asd,
 		      enum ia_css_pipe_id pipe_id, bool in_reset);
 
-int atomisp_css_continuous_set_num_raw_frames(
-    struct atomisp_sub_device *asd,
-    int num_frames);
+void atomisp_css_continuous_set_num_raw_frames(
+     struct atomisp_sub_device *asd,
+     int num_frames);
 
 int atomisp_css_copy_configure_output(struct atomisp_sub_device *asd,
 				      unsigned int stream_index,

drivers/staging/media/atomisp/pci/atomisp_compat_css20.c

@@ -2190,9 +2190,9 @@ void atomisp_css_stop(struct atomisp_sub_device *asd,
 	memset(&asd->params.css_param, 0, sizeof(asd->params.css_param));
 }
 
-int atomisp_css_continuous_set_num_raw_frames(
-    struct atomisp_sub_device *asd,
-    int num_frames)
+void atomisp_css_continuous_set_num_raw_frames(
+     struct atomisp_sub_device *asd,
+     int num_frames)
 {
 	if (asd->enable_raw_buffer_lock->val) {
 		asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL]
@@ -2216,7 +2216,6 @@ int atomisp_css_continuous_set_num_raw_frames(
 
 	asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL]
 	.stream_config.target_num_cont_raw_buf = num_frames;
-	return 0;
 }
 
 static enum ia_css_pipe_mode __pipe_id_to_pipe_mode(