From a0763b27bf24f028d8b049ad856b2ee031fb475d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 11 Feb 2015 14:07:49 +0100 Subject: [PATCH] block: handle the null_mapped flag correctly in blk_rq_map_user_iov The tape drivers (and the sg driver in a special case that doesn't matter here) use the null_mapped flag to tell blk_rq_map_user to not copy around any data into or out of the bounce buffers. blk_rq_map_user_iov never got that treatment, which didn't matter until I refactored blk_rq_map_user to be implemented in terms of blk_rq_map_user_iov. Signed-off-by: Christoph Hellwig Fixes: ddad8dd0a162 ("block: use blk_rq_map_user_iov to implement blk_rq_map_user") Signed-off-by: Jens Axboe --- Reading git-format-patch failed