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[RFC,02/21] loop: use lib tagset init helper

Message ID 20221005032257.80681-3-kch@nvidia.com (mailing list archive)
State Not Applicable
Headers show
Series block: add and use init tagset helper | expand

Commit Message

Chaitanya Kulkarni Oct. 5, 2022, 3:22 a.m. UTC 
Use the block layer helper to initialize the common fields of tag_set
such as blk_mq_ops, number of h/w queues, queue depth, command size,
numa_node, timeout, BLK_MQ_F_XXX flags, driver data. This initialization
is spread all over the block drivers. This avoids the code repetation of
the inialization code of the tag set in current block drivers and any
future ones.

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
---
 drivers/block/loop.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)
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Patch

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index ad92192c7d61..a915f25b4410 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1937,6 +1937,8 @@  static const struct blk_mq_ops loop_mq_ops = {
 
 static int loop_add(int i)
 {
+	unsigned int flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_STACKING |
+		BLK_MQ_F_NO_SCHED_BY_DEFAULT;
 	struct loop_device *lo;
 	struct gendisk *disk;
 	int err;
@@ -1967,14 +1969,8 @@  static int loop_add(int i)
 		goto out_free_dev;
 	i = err;
 
-	lo->tag_set.ops = &loop_mq_ops;
-	lo->tag_set.nr_hw_queues = 1;
-	lo->tag_set.queue_depth = hw_queue_depth;
-	lo->tag_set.numa_node = NUMA_NO_NODE;
-	lo->tag_set.cmd_size = sizeof(struct loop_cmd);
-	lo->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_STACKING |
-		BLK_MQ_F_NO_SCHED_BY_DEFAULT;
-	lo->tag_set.driver_data = lo;
+	blk_mq_init_tag_set(&lo->tag_set, &loop_mq_ops, 1, hw_queue_depth,
+			sizeof(struct loop_cmd), NUMA_NO_NODE, 0, flags, lo);
 
 	err = blk_mq_alloc_tag_set(&lo->tag_set);
 	if (err)