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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2008-08-25 20:36:08 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-08-27 09:50:19 +0200
commit76029ff37f31dad64641489c610d98955217bb68 (patch)
treee8f729fa6288676be357295141a0950f171a62d8 /fs/ubifs/misc.h
parent48fd4f93a00eac844678629f2f00518e146ed30d (diff)
bio: fix bio_copy_kern() handling of bio->bv_len
The commit 68154e90c9d1492d570671ae181d9a8f8530da55 introduced bio_copy_kern() to add bounce support to blk_rq_map_kern. bio_copy_kern() uses bio->bv_len to copy data for READ commands after the completion but it doesn't work with a request that partially completed. SCSI always completes a PC request as a whole but seems some don't. This patch fixes bio_copy_kern to handle the above case. As bio_copy_user does, bio_copy_kern uses struct bio_map_data to store struct bio_vec. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reported-by: Nix <nix@esperi.org.uk> Tested-by: Nix <nix@esperi.org.uk> Cc: stable@kernel.org Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'fs/ubifs/misc.h')
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