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FROMGIT: scsi: ufs: core: Exclude UECxx from SFR dump list

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Some devices may return invalid or zeroed data during an UIC error
condition. In addition, reading these SFRs will clear them. This means the
subsequent error handling will not be able to see them and therefore no
error handling will be scheduled.

Skip reading these SFRs in ufshcd_dump_regs().

Bug: 230521674
Change-Id: Idc62842c79f948580107f95c65a14e34630a0017
(cherry picked from commit ef60031022
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git 5.19/scsi-staging)
Link: https://lore.kernel.org/r/1648689845-33521-1-git-send-email-kwmad.kim@samsung.com
Fixes: d672475664 ("scsi: ufs: Use explicit access size in ufshcd_dump_regs")
Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Kiwoong Kim
2022-03-31 10:24:05 +09:00
committed by Bart Van Assche
parent 94816d9fd6
commit 3ccc4b2705
1 changed files with 6 additions and 1 deletions
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7
drivers/scsi/ufs/ufshcd.c
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@@ -115,8 +115,13 @@ int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
if (!regs)
return -ENOMEM;
for (pos = 0; pos < len; pos += 4)
for (pos = 0; pos < len; pos += 4) {
if (offset == 0 &&
pos >= REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER &&
pos <= REG_UIC_ERROR_CODE_DME)
continue;
regs[pos / 4] = ufshcd_readl(hba, offset + pos);
}
ufshcd_hex_dump(prefix, regs, len);
kfree(regs);