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blk-mq: directly poll requests

Ming Lei requested to merge minlei/centos-stream-9:rhel9.3_fix_bio_poll_panic into main

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2186507

commit 38a8c4d1d45006841f0643f4cb29b5e50758837c
Author: Keith Busch kbusch@kernel.org
Date: Fri Mar 31 11:00:56 2023 -0700

blk-mq: directly poll requests  

Polling needs a bio with a valid bi_bdev, but neither of those are  
guaranteed for polled driver requests. Make request based polling  
directly use blk-mq's polling function instead.  

When executing a request from a polled hctx, we know the request's  
cookie, and that it's from a live blk-mq queue that supports polling, so  
we can safely skip everything that bio_poll provides.  

Cc: stable@kernel.org  
Reported-by: Martin Belanger <Martin.Belanger@dell.com>  
Reported-by: Daniel Wagner <dwagner@suse.de>  
Signed-off-by: Keith Busch <kbusch@kernel.org>  
Tested-by: Daniel Wagner <dwagner@suse.de>  
Revieded-by: Daniel Wagner <dwagner@suse.de>  
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>  
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>  
Reviewed-by: Christoph Hellwig <hch@lst.de>  
Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>  
Link: https://lore.kernel.org/r/20230331180056.1155862-1-kbusch@meta.com  
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Signed-off-by: Ming Lei ming.lei@redhat.com

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