tree 9efb7d762e51cb92dcee0e90ebdb76185aadebb4
parent 5f49f63178360b07a095bd33b0d850d60edf7590
author Tejun Heo <tj@kernel.org> 1242725586 +0900
committer Jens Axboe <jens.axboe@oracle.com> 1242725768 +0200

bio: always copy back data for copied kernel requests

When a read bio_copy_kern() request fails, the content of the bounce
buffer is not copied back.  However, as request failure doesn't
necessarily mean complete failure, the buffer state can be useful.
This behavior is also inconsistent with the user map counterpart and
causes the subtle difference between bounced and unbounced IO causes
confusion.

This patch makes bio_copy_kern_endio() ignore @err and always copy
back data on request completion.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Boaz Harrosh <bharrosh@panasas.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>