From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 26 Jun 2015 09:44:46 +0000 (+0200)
Subject: block: fix bogus EFAULT error from SG_IO ioctl
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~70^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c4cffe85170a001c1d092681c86aa1128295221;p=pandora-kernel.git

block: fix bogus EFAULT error from SG_IO ioctl

Whenever blk_fill_sghdr_rq fails, its errno code is ignored and changed to
EFAULT.  This can cause very confusing errors:

  $ sg_persist -k /dev/sda
  persistent reservation in: pass through os error: Bad address

The fix is trivial, just propagate the return value from
blk_fill_sghdr_rq.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

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