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authorMing Lei <ming.lei@redhat.com>2023-08-09 10:04:40 +0800
committerJens Axboe <axboe@kernel.dk>2023-08-11 08:12:32 -0600
commita7a7dabb5dd72d2875bc3ce56f94ea5ceb259d5b (patch)
tree1b4104bd16a57891c511cb8758ee560f8249b7c2 /block
parentf099a108cabf72a1184b1e14e4a09f4ca3375750 (diff)
nvme: core: don't hold rcu read lock in nvme_ns_chr_uring_cmd_iopoll
Now nvme_ns_chr_uring_cmd_iopoll() has switched to request based io polling, and the associated NS is guaranteed to be live in case of io polling, so request is guaranteed to be valid because blk-mq uses pre-allocated request pool. Remove the rcu read lock in nvme_ns_chr_uring_cmd_iopoll(), which isn't needed any more after switching to request based io polling. Fix "BUG: sleeping function called from invalid context" because set_page_dirty_lock() from blk_rq_unmap_user() may sleep. Fixes: 585079b6e425 ("nvme: wire up async polling for io passthrough commands") Reported-by: Guangwu Zhang <guazhang@redhat.com> Cc: Kanchan Joshi <joshi.k@samsung.com> Cc: Anuj Gupta <anuj20.g@samsung.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Tested-by: Guangwu Zhang <guazhang@redhat.com> Link: https://lore.kernel.org/r/20230809020440.174682-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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