linux-kernel - [PATCH V2 4/5] f2fs: ignore discard return value

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Message-Id: <20251124025737.203571-5-ckulkarnilinux@gmail.com>
Date: Sun, 23 Nov 2025 18:57:36 -0800
From: Chaitanya Kulkarni <ckulkarnilinux@...il.com>
To: axboe@...nel.dk,
	agk@...hat.com,
	snitzer@...nel.org,
	mpatocka@...hat.com,
	song@...nel.org,
	yukuai@...as.com,
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	cem@...nel.org
Cc: linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	dm-devel@...ts.linux.dev,
	linux-raid@...r.kernel.org,
	linux-nvme@...ts.infradead.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	linux-xfs@...r.kernel.org,
	bpf@...r.kernel.org,
	Chaitanya Kulkarni <ckulkarnilinux@...il.com>
Subject: [PATCH V2 4/5] f2fs: ignore discard return value

__blkdev_issue_discard() always returns 0, making the error assignment
in __submit_discard_cmd() dead code.

Initialize err to 0 and remove the error assignment from the
__blkdev_issue_discard() call tp err. Move fault injection code into
already present if branch where err is set to -EIO.

This preserves the fault injection behavior while removing dead error
handling.

Signed-off-by: Chaitanya Kulkarni <ckulkarnilinux@...il.com>
---
 fs/f2fs/segment.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index b45eace879d7..3dbcfb9067e9 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1343,15 +1343,9 @@ static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
 
 		dc->di.len += len;
 
+		err = 0;
 		if (time_to_inject(sbi, FAULT_DISCARD)) {
 			err = -EIO;
-		} else {
-			err = __blkdev_issue_discard(bdev,
-					SECTOR_FROM_BLOCK(start),
-					SECTOR_FROM_BLOCK(len),
-					GFP_NOFS, &bio);
-		}
-		if (err) {
 			spin_lock_irqsave(&dc->lock, flags);
 			if (dc->state == D_PARTIAL)
 				dc->state = D_SUBMIT;
@@ -1360,6 +1354,10 @@ static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
 			break;
 		}
 
+		__blkdev_issue_discard(bdev,
+				SECTOR_FROM_BLOCK(start),
+				SECTOR_FROM_BLOCK(len),
+				GFP_NOFS, &bio);
 		f2fs_bug_on(sbi, !bio);
 
 		/*
-- 
2.40.0