libata: use blk taging

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libata uses its own tag management which is duplication and the
implementation is poor. And if we switch to blk-mq, tag is build-in.
It's time to switch to generic taging.

The SAS driver has its own tag management, and looks we can't directly
map the host controler tag to SATA tag. So I just bypassed the SAS case.

I changed the code/variable name for the tag management of libata to
make it self contained. Only sas will use it. Later if libsas implements
its tag management, the tag management code in libata can be deleted
easily.

Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>

...

This commit is contained in:

Shaohua Li 2015-01-15 17:32:27 -08:00 • committed by Jens Axboe

parent a4a1cc16a7

commit 12cb5ce101

4 changed files with 48 additions and 17 deletions

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54

drivers/ata/libata-core.c

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4

drivers/ata/libata-scsi.c

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2

drivers/ata/libata.h

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5

include/linux/libata.h

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