From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Wed, 17 Apr 2024 21:27:43 +0000 (-0400)
Subject: bcachefs: Fix bio alloc in check_extent_checksum()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0389c09b2fb702ca7924ddf550ce0c8af708b8be;p=linux.git

bcachefs: Fix bio alloc in check_extent_checksum()

if the buffer is virtually mapped it won't be a single bvec

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/backpointers.c b/fs/bcachefs/backpointers.c
index fadb1078903d2..a200442010025 100644
--- a/fs/bcachefs/backpointers.c
+++ b/fs/bcachefs/backpointers.c
@@ -470,7 +470,7 @@ found:
 		goto err;
 	}
 
-	bio = bio_alloc(ca->disk_sb.bdev, 1, REQ_OP_READ, GFP_KERNEL);
+	bio = bio_alloc(ca->disk_sb.bdev, buf_pages(data_buf, bytes), REQ_OP_READ, GFP_KERNEL);
 	bio->bi_iter.bi_sector = p.ptr.offset;
 	bch2_bio_map(bio, data_buf, bytes);
 	ret = submit_bio_wait(bio);