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docs: block: blk-mq.rst: correct drive -> driver
It is 'driver' to complete the request. Also remove a redundant space. Signed-off-by: Yue Hu <huyue2@yulong.com> Link: https://lore.kernel.org/r/20210520074225.1989-1-zbestahu@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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@ -62,7 +62,7 @@ queue, to be sent in the future, when the hardware is able.
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Software staging queues
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~~~~~~~~~~~~~~~~~~~~~~~
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The block IO subsystem adds requests in the software staging queues
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The block IO subsystem adds requests in the software staging queues
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(represented by struct blk_mq_ctx) in case that they weren't sent
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directly to the driver. A request is one or more BIOs. They arrived at the
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block layer through the data structure struct bio. The block layer
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@ -132,7 +132,7 @@ In order to indicate which request has been completed, every request is
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identified by an integer, ranging from 0 to the dispatch queue size. This tag
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is generated by the block layer and later reused by the device driver, removing
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the need to create a redundant identifier. When a request is completed in the
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drive, the tag is sent back to the block layer to notify it of the finalization.
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driver, the tag is sent back to the block layer to notify it of the finalization.
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This removes the need to do a linear search to find out which IO has been
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completed.
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