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scsi: ufs: ufshpb: Rewind the read timeout on every read 

The purpose of the "cold"-timer is not to hang-on to active regions with no
reads.  Therefore the read timeout should be rewound on every read, and not
just when the region is activated.

Link: https://lore.kernel.org/r/20210808090024.21721-2-avri.altman@wdc.com
Fixes: 13c044e916 (scsi: ufs: ufshpb: Add "cold" regions timer)
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Avri Altman 2021-08-08 12:00:21 +03:00 committed by Martin K. Petersen
parent 83da6ad6f9
commit 283e61c5a9
1 changed files with 13 additions and 3 deletions
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16
drivers/scsi/ufs/ufshpb.c
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@ -178,9 +178,19 @@ next_srgn:
set_bit_len = cnt;
spin_lock_irqsave(&hpb->rgn_state_lock, flags);
if (set_dirty && rgn->rgn_state != HPB_RGN_INACTIVE &&
srgn->srgn_state == HPB_SRGN_VALID)
bitmap_set(srgn->mctx->ppn_dirty, srgn_offset, set_bit_len);
if (rgn->rgn_state != HPB_RGN_INACTIVE) {
if (set_dirty) {
if (srgn->srgn_state == HPB_SRGN_VALID)
bitmap_set(srgn->mctx->ppn_dirty, srgn_offset,
set_bit_len);
} else if (hpb->is_hcm) {
/* rewind the read timer for lru regions */
rgn->read_timeout = ktime_add_ms(ktime_get(),
rgn->hpb->params.read_timeout_ms);
rgn->read_timeout_expiries =
rgn->hpb->params.read_timeout_expiries;
}
}
spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
if (hpb->is_hcm && prev_srgn != srgn) {