From: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Date: Mon, 6 Mar 2023 15:30:24 +0900
Subject: scsi: sd: Fix wrong zone_write_granularity value during revalidate
Git-commit: 288b3271d920c9ba949c3bab0f749f4cecc70e09
Patch-mainline: v6.3-rc2
References: git-fixes

When the sd driver revalidates host-managed SMR disks, it calls
disk_set_zoned() which changes the zone_write_granularity attribute value
to the logical block size regardless of the device type. After that, the sd
driver overwrites the value in sd_zbc_read_zone() with the physical block
size, since ZBC/ZAC requires this for host-managed disks. Between the calls
to disk_set_zoned() and sd_zbc_read_zone(), there exists a window where the
attribute shows the logical block size as the zone_write_granularity value,
which is wrong for host-managed disks. The duration of the window is from
20ms to 200ms, depending on report zone command execution time.

To avoid the wrong zone_write_granularity value between disk_set_zoned()
and sd_zbc_read_zone(), modify the value not in sd_zbc_read_zone() but
just after disk_set_zoned() call.

[lduncan: hand applied both hunks]

Fixes: a805a4fa4fa3 ("block: introduce zone_write_granularity limit")
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Link: https://lore.kernel.org/r/20230306063024.3376959-1-shinichiro.kawasaki@wdc.com
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/sd.c     |    7 ++++++-
 drivers/scsi/sd_zbc.c |    8 --------
 2 files changed, 6 insertions(+), 9 deletions(-)

--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -3030,8 +3030,13 @@ static void sd_read_block_characteristic
 	}
 
 	if (sdkp->device->type == TYPE_ZBC) {
-		/* Host-managed */
+		/*
+		 * Host-managed: Per ZBC and ZAC specifications, writes in
+		 * sequential write required zones of host-managed devices must
+		 * be aligned to the device physical block size.
+		 */
 		blk_queue_set_zoned(sdkp->disk, BLK_ZONED_HM);
+		blk_queue_zone_write_granularity(q, sdkp->physical_block_size);
 	} else {
 		sdkp->zoned = (buffer[8] >> 4) & 3;
 		if (sdkp->zoned == 1) {
--- a/drivers/scsi/sd_zbc.c
+++ b/drivers/scsi/sd_zbc.c
@@ -826,14 +826,6 @@ int sd_zbc_read_zones(struct scsi_disk *
 	blk_queue_max_active_zones(q, 0);
 	nr_zones = round_up(sdkp->capacity, zone_blocks) >> ilog2(zone_blocks);
 
-	/*
-	 * Per ZBC and ZAC specifications, writes in sequential write required
-	 * zones of host-managed devices must be aligned to the device physical
-	 * block size.
-	 */
-	if (blk_queue_zoned_model(q) == BLK_ZONED_HM)
-		blk_queue_zone_write_granularity(q, sdkp->physical_block_size);
-
 	sdkp->rev_nr_zones = nr_zones;
 	sdkp->rev_zone_blocks = zone_blocks;