From: Robert Elliott <elliott@hp.com>
Date: Tue, 2 Sep 2014 16:38:49 +0000 (-0500)
Subject: blk-mq: pass along blk_mq_alloc_tag_set return values
X-Git-Tag: fixes-for-v3.18-merge-window~132^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dc501dc0d9dc9cbabc18b920f91a26c207e9476c;p=pandora-kernel.git

blk-mq: pass along blk_mq_alloc_tag_set return values

Two of the blk-mq based drivers do not pass back the return value
from blk_mq_alloc_tag_set, instead just returning -ENOMEM.

blk_mq_alloc_tag_set returns -EINVAL if the number of queues or
queue depth is bad.  -ENOMEM implies that retrying after freeing some
memory might be more successful, but that won't ever change
in the -EINVAL cases.

Change the null_blk and mtip32xx drivers to pass along
the return value.

Signed-off-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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