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authorChristoph Hellwig <hch@lst.de>2022-02-09 11:28:27 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2022-02-23 05:11:08 +0300
commita773187e37fa5c3bcd92ffda9085707df34f903a (patch)
tree71389a9211836c9b3c3c32b74ffca93285f1450b /drivers/md/dm-io.c
parent10fa225c33a97385f2843e60b8e86b0ce0cd1e5f (diff)
downloadlinux-a773187e37fa5c3bcd92ffda9085707df34f903a.tar.xz
scsi: dm: Remove WRITE_SAME support
There are no more end-users of REQ_OP_WRITE_SAME left, so we can start deleting it. Link: https://lore.kernel.org/r/20220209082828.2629273-7-hch@lst.de Reviewed-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/md/dm-io.c')
-rw-r--r--drivers/md/dm-io.c22
1 files changed, 2 insertions, 20 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 2d3cda0acacb..82d431677bb6 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -304,7 +304,6 @@ static void do_region(int op, int op_flags, unsigned region,
unsigned num_bvecs;
sector_t remaining = where->count;
struct request_queue *q = bdev_get_queue(where->bdev);
- unsigned short logical_block_size = queue_logical_block_size(q);
sector_t num_sectors;
unsigned int special_cmd_max_sectors;
@@ -315,10 +314,8 @@ static void do_region(int op, int op_flags, unsigned region,
special_cmd_max_sectors = q->limits.max_discard_sectors;
else if (op == REQ_OP_WRITE_ZEROES)
special_cmd_max_sectors = q->limits.max_write_zeroes_sectors;
- else if (op == REQ_OP_WRITE_SAME)
- special_cmd_max_sectors = q->limits.max_write_same_sectors;
- if ((op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES ||
- op == REQ_OP_WRITE_SAME) && special_cmd_max_sectors == 0) {
+ if ((op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES) &&
+ special_cmd_max_sectors == 0) {
atomic_inc(&io->count);
dec_count(io, region, BLK_STS_NOTSUPP);
return;
@@ -337,9 +334,6 @@ static void do_region(int op, int op_flags, unsigned region,
case REQ_OP_WRITE_ZEROES:
num_bvecs = 0;
break;
- case REQ_OP_WRITE_SAME:
- num_bvecs = 1;
- break;
default:
num_bvecs = bio_max_segs(dm_sector_div_up(remaining,
(PAGE_SIZE >> SECTOR_SHIFT)));
@@ -356,18 +350,6 @@ static void do_region(int op, int op_flags, unsigned region,
num_sectors = min_t(sector_t, special_cmd_max_sectors, remaining);
bio->bi_iter.bi_size = num_sectors << SECTOR_SHIFT;
remaining -= num_sectors;
- } else if (op == REQ_OP_WRITE_SAME) {
- /*
- * WRITE SAME only uses a single page.
- */
- dp->get_page(dp, &page, &len, &offset);
- bio_add_page(bio, page, logical_block_size, offset);
- num_sectors = min_t(sector_t, special_cmd_max_sectors, remaining);
- bio->bi_iter.bi_size = num_sectors << SECTOR_SHIFT;
-
- offset = 0;
- remaining -= num_sectors;
- dp->next_page(dp);
} else while (remaining) {
/*
* Try and add as many pages as possible.