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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2010-07-20 21:29:37 -0400
committerJens Axboe <jaxboe@fusionio.com>2010-08-07 12:52:31 -0400
commit6a32a8aed509e71137043d464db4a7fcd88c903e (patch)
tree66689f31e570805a29ef129cc9ebe4c088d47837 /drivers/block
parent8112586063fe53958d60218631d661533f304504 (diff)
scsi: convert discard to REQ_TYPE_FS from REQ_TYPE_BLOCK_PC
Jens, any reason why this isn't included in your for-2.6.36 yet? = From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Subject: [PATCH resend] scsi: convert discard to REQ_TYPE_FS from REQ_TYPE_BLOCK_PC The block layer (file systems) sends discard requests as REQ_TYPE_FS (the role of REQ_TYPE_FS is that setting up commands and interpreting the results). But SCSI-ml treats discard requests as REQ_TYPE_BLOCK_PC. scsi-ml can handle discard requests as REQ_TYPE_FS easily. scsi_setup_discard_cmnd() sets up struct request and the bio nicely. Only remaining issue is that discard requests can't be completed partially so we need to modify sd_done. This conversion also fixes the problem that discard requests aren't retried when possible (e.g. UNIT ATTENTION). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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