linux-kernel - [PATCH 2/4] btrfs: break loop in case set_io

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Date:   Mon, 18 Sep 2023 07:14:31 -0700
From:   Johannes Thumshirn <johannes.thumshirn@....com>
To:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>
Cc:     Qu Wenru <wqu@...e.com>, linux-btrfs@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH 2/4] btrfs: break loop in case set_io_stripe fails

Break out of the loop in case st_io_stripe() fails.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
---
 fs/btrfs/volumes.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0c5bd8d2ea06..d2a0ae9d91c4 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6576,11 +6576,15 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
 		 */
 		bioc->full_stripe_logical = em->start +
 			btrfs_stripe_nr_to_offset(stripe_nr * data_stripes);
-		for (i = 0; i < num_stripes; i++)
+		for (i = 0; i < num_stripes; i++) {
 			ret = set_io_stripe(fs_info, op, logical, length,
 					    &bioc->stripes[i], map,
 					    (i + stripe_nr) % num_stripes,
 					    stripe_offset, stripe_nr);
+			if (ret)
+				break;
+		}
+
 	} else {
 		/*
 		 * For all other non-RAID56 profiles, just copy the target
@@ -6590,6 +6594,8 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
 			ret = set_io_stripe(fs_info, op, logical, length,
 					    &bioc->stripes[i], map, stripe_index,
 					    stripe_offset, stripe_nr);
+			if (ret)
+				break;
 			stripe_index++;
 		}
 	}

-- 
2.41.0