[f2fs-dev] [PATCH] f2fs: remove redundant return in f2fs_create_flush_cmd_control()

[f2fs-dev] [PATCH] f2fs: remove redundant return in f2fs_create_flush_cmd_control()

[Yangtao Li via Linux-f2fs-devel]

Replace
	if (A) {
		......
		return err;
	}
	return err;
with
	if (A) {
		......
	}
	return err;

Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 fs/f2fs/segment.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index acf3d3fa4363..f6f16d691226 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -647,7 +647,6 @@ int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
 		err = PTR_ERR(fcc->f2fs_issue_flush);
 		kfree(fcc);
 		SM_I(sbi)->fcc_info = NULL;
-		return err;
 	}
 
 	return err;
-- 
2.25.1



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Re: [f2fs-dev] [PATCH] f2fs: remove redundant return in f2fs_create_flush_cmd_control()

[Chao Yu]

On 2022/10/24 21:59, Yangtao Li wrote:
> Replace
> 	if (A) {
> 		......
> 		return err;
> 	}
> 	return err;
> with
> 	if (A) {
> 		......
> 	}
> 	return err;
> 
> Signed-off-by: Yangtao Li <frank.li@vivo.com>
> ---
>   fs/f2fs/segment.c | 1 -
>   1 file changed, 1 deletion(-)
> 
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index acf3d3fa4363..f6f16d691226 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -647,7 +647,6 @@ int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
>   		err = PTR_ERR(fcc->f2fs_issue_flush);
>   		kfree(fcc);
>   		SM_I(sbi)->fcc_info = NULL;
> -		return err;
>   	}
>   
>   	return err;

It may looks more clean if it return 0 here?

Thanks,



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Re: [f2fs-dev] [PATCH] f2fs: remove redundant return in f2fs_create_flush_cmd_control()

[Yangtao Li via Linux-f2fs-devel]

Hi Chao,

In my point of view, it should not return 0. Because calling kthread_run()
to create a kernel thread may fails, and err is assigned a value.

Thanks,


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Re: [f2fs-dev] [PATCH] f2fs: remove redundant return in f2fs_create_flush_cmd_control()

[Chao Yu]

On 2022/10/25 15:08, Yangtao Li wrote:
> Hi Chao,
> 
> In my point of view, it should not return 0. Because calling kthread_run()
> to create a kernel thread may fails, and err is assigned a value.

I commented on last 'return err' rather than the one in error path...

Maybe:

---
  fs/f2fs/segment.c | 8 ++++----
  1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 81aadfc06c89..25ee8c8cb2cf 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -634,12 +634,12 @@ int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
  {
  	dev_t dev = sbi->sb->s_bdev->bd_dev;
  	struct flush_cmd_control *fcc;
-	int err = 0;
+	int err;

  	if (SM_I(sbi)->fcc_info) {
  		fcc = SM_I(sbi)->fcc_info;
  		if (fcc->f2fs_issue_flush)
-			return err;
+			return 0;
  		goto init_thread;
  	}

@@ -652,7 +652,7 @@ int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
  	init_llist_head(&fcc->issue_list);
  	SM_I(sbi)->fcc_info = fcc;
  	if (!test_opt(sbi, FLUSH_MERGE))
-		return err;
+		return 0;

  init_thread:
  	fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
@@ -664,7 +664,7 @@ int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
  		return err;
  	}

-	return err;
+	return 0;
  }

  void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
-- 
2.25.1



> 
> Thanks,


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