Add a function to resize the number of tags in an existing tag set.
Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>
---
block/blk-mq.c | 15 +++++++++++++++
include/linux/blk-mq.h | 1 +
2 files changed, 16 insertions(+)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 29cbc1b..e2afe45 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2385,6 +2385,21 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues)
}
EXPORT_SYMBOL_GPL(blk_mq_update_nr_hw_queues);
+int blk_mq_resize_tag_set(struct blk_mq_tag_set *set, int new_tags)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < set->nr_hw_queues; i++) {
+ if (!set->tags[i])
+ continue;
+ ret = blk_mq_tag_update_depth(set->tags[i], new_tags);
+ if (ret)
+ break;
+ }
+ return ret;
+}
+EXPORT_SYMBOL(blk_mq_resize_tag_set);
+
void blk_mq_disable_hotplug(void)
{
mutex_lock(&all_q_mutex);
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 2498fdf..8b603b6 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -181,6 +181,7 @@ void blk_mq_unregister_disk(struct gendisk *);
int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set);
void blk_mq_free_tag_set(struct blk_mq_tag_set *set);
+int blk_mq_resize_tag_set(struct blk_mq_tag_set *set, int new_tags);
void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule);
--
1.8.5.6
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
