[PATCH v4 03/19] ext4: fix wrong unit use in ext4_mb_find_by_goal

From: Kemeng Shi
Date: Sat Jun 03 2023 - 03:02:32 EST


We need start in block unit while fe_start is in cluster unit. Use
ext4_grp_offs_to_block helper to convert fe_start to get start in
block unit.

Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Reviewed-by: Ojaswin Mujoo <ojaswin@xxxxxxxxxxxxx>
---
fs/ext4/mballoc.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index d8caef7cd9d0..f6dc4f276ca4 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2210,8 +2210,7 @@ int ext4_mb_find_by_goal(struct ext4_allocation_context *ac,
if (max >= ac->ac_g_ex.fe_len && ac->ac_g_ex.fe_len == sbi->s_stripe) {
ext4_fsblk_t start;

- start = ext4_group_first_block_no(ac->ac_sb, e4b->bd_group) +
- ex.fe_start;
+ start = ext4_grp_offs_to_block(ac->ac_sb, &ex);
/* use do_div to get remainder (would be 64-bit modulo) */
if (do_div(start, sbi->s_stripe) == 0) {
ac->ac_found++;
--
2.30.0