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scsi: ufs: ufshpb: Fix a NULL check on list iterator

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[ Upstream commit bfb7789bcb ]

The list iterator is always non-NULL so the check 'if (!rgn)' is always
false and the dev_err() is never called. Move the check outside the loop
and determine if 'victim_rgn' is NULL, to fix this bug.

Link: https://lore.kernel.org/r/20220320150733.21824-1-xiam0nd.tong@gmail.com
Fixes: 4b5f49079c ("scsi: ufs: ufshpb: L2P map management for HPB read")
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiaomeng Tong
2022-03-20 23:07:33 +08:00
committed by Greg Kroah-Hartman
parent a972c76872
commit 685f42de44
1 changed files with 5 additions and 6 deletions
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11
drivers/scsi/ufs/ufshpb.c
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@@ -870,12 +870,6 @@ static struct ufshpb_region *ufshpb_victim_lru_info(struct ufshpb_lu *hpb)
struct ufshpb_region *rgn, *victim_rgn = NULL;
list_for_each_entry(rgn, &lru_info->lh_lru_rgn, list_lru_rgn) {
if (!rgn) {
dev_err(&hpb->sdev_ufs_lu->sdev_dev,
"%s: no region allocated\n",
__func__);
return NULL;
}
if (ufshpb_check_srgns_issue_state(hpb, rgn))
continue;
@@ -891,6 +885,11 @@ static struct ufshpb_region *ufshpb_victim_lru_info(struct ufshpb_lu *hpb)
break;
}
if (!victim_rgn)
dev_err(&hpb->sdev_ufs_lu->sdev_dev,
"%s: no region allocated\n",
__func__);
return victim_rgn;
}