Revert "blk-mq: fix null pointer dereference in blk_mq_queue_tag_busy_ite"
hulk inclusion category: bugfix bugzilla: 187497, https://gitee.com/openeuler/kernel/issues/I5MT95 CVE: NA -------------------------------- This reverts commit 64ba823f. Commit fea9f92f1748 introduce the bug. It is a patch for performance optimization and this version doesn't have to backport it. blk_mq_queue_tag_busy_iter() won't access q->tag_set->flags or reference other fields in q that is uninitialized at present. 64ba823f will make io hang for special scsi drivers(e.x. ata_piix). Revert it. Signed-off-by:Li Nan <linan122@huawei.com> Reviewed-by:
Yu Kuai <yukuai3@huawei.com> Reviewed-by:
Jason Yan <yanaijie@huawei.com> Signed-off-by:
Yongqiang Liu <liuyongqiang13@huawei.com>
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