Two core fixes: one to prevent discard type changes (seen on iSCSI)
during intermittent errors and the other is fixing a lockdep problem
caused by the queue limits change. One driver fix in ufs.
The patch is available here:
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git scsi-fixes
The short changelog is:
Li Feng (1):
scsi: sd: Keep the discard mode stable
Shin'ichiro Kawasaki (1):
scsi: sd: Move sd_read_cpr() out of the q->limits_lock region
Vamshi Gajjela (1):
scsi: ufs: core: Fix hba->last_dme_cmd_tstamp timestamp updating logic
And the diffstat:
drivers/scsi/sd.c | 15 ++++++++++-----
drivers/ufs/core/ufshcd.c | 11 ++++++++---
2 files changed, 18 insertions(+), 8 deletions(-)
With full diff below.
James
---
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 8bb3a3611851..699f4f9674d9 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2711,8 +2711,6 @@ static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
if (buffer[14] & 0x40) /* LBPRZ */
sdkp->lbprz = 1;
-
- sd_config_discard(sdkp, lim, SD_LBP_WS16);
}
sdkp->capacity = lba + 1;
@@ -3365,8 +3363,6 @@ static void sd_read_block_limits(struct scsi_disk *sdkp,
sdkp->unmap_alignment =
get_unaligned_be32(&vpd->data[32]) & ~(1 << 31);
- sd_config_discard(sdkp, lim, sd_discard_mode(sdkp));
-
config_atomic:
sdkp->max_atomic = get_unaligned_be32(&vpd->data[44]);
sdkp->atomic_alignment = get_unaligned_be32(&vpd->data[48]);
@@ -3753,9 +3749,10 @@ static int sd_revalidate_disk(struct gendisk *disk)
sd_read_block_limits_ext(sdkp);
sd_read_block_characteristics(sdkp, &lim);
sd_zbc_read_zones(sdkp, &lim, buffer);
- sd_read_cpr(sdkp);
}
+ sd_config_discard(sdkp, &lim, sd_discard_mode(sdkp));
+
sd_print_capacity(sdkp, old_capacity);
sd_read_write_protect_flag(sdkp, buffer);
@@ -3808,6 +3805,14 @@ static int sd_revalidate_disk(struct gendisk *disk)
if (err)
return err;
+ /*
+ * Query concurrent positioning ranges after
+ * queue_limits_commit_update() unlocked q->limits_lock to avoid
+ * deadlock with q->sysfs_dir_lock and q->sysfs_lock.
+ */
+ if (sdkp->media_present && scsi_device_supports_vpd(sdp))
+ sd_read_cpr(sdkp);
+
/*
* For a zoned drive, revalidating the zones can be done only once
* the gendisk capacity is set. So if this fails, set back the gendisk
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 5e3c67e96956..0b3d0c8e0dda 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -4100,11 +4100,16 @@ static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba)
min_sleep_time_us =
MIN_DELAY_BEFORE_DME_CMDS_US - delta;
else
- return; /* no more delay required */
+ min_sleep_time_us = 0; /* no more delay required */
}
- /* allow sleep for extra 50us if needed */
- usleep_range(min_sleep_time_us, min_sleep_time_us + 50);
+ if (min_sleep_time_us > 0) {
+ /* allow sleep for extra 50us if needed */
+ usleep_range(min_sleep_time_us, min_sleep_time_us + 50);
+ }
+
+ /* update the last_dme_cmd_tstamp */
+ hba->last_dme_cmd_tstamp = ktime_get();
}
/**
