From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Thu, 25 Jun 2015 16:12:11 +0000 (+0200)
Subject: storvsc: be more picky about scmnd->sc_data_direction
X-Git-Tag: omap-for-v4.3/fixes-rc1~115^2~69
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb1cf0804fe582f8a626c3cc591cb3127536137c;p=pandora-kernel.git

storvsc: be more picky about scmnd->sc_data_direction

Under the 'default' case in scmnd->sc_data_direction we have 3 options:
- DMA_NONE which we handle correctly.
- DMA_BIDIRECTIONAL which is never supposed to be set by SCSI stack.
- Garbage value.

Do WARN() and return -EINVAL in the last two cases. virtio_scsi does
BUG_ON() here but it looks like an overkill.

Reported-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
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