From: Tejun Heo <tj@kernel.org>
Date: Mon, 23 Aug 2010 09:27:27 +0000 (+0200)
Subject: libata: be less of a drama queen on empty data commands
X-Git-Tag: v2.6.36-rc3~20^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=60f5d6ef6b6e70fe850554381fd8336f11530002;p=pandora-kernel.git

libata: be less of a drama queen on empty data commands

ata_qc_issue() BUG_ON()s on data commands w/o data, which may be
submitted via SG_IO.  Be less of a drama queen and just trigger
WARN_ON_ONCE() and fail the command with AC_ERR_SYSTEM.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Stefan Hübner <stefan.huebner@stud.tu-ilmenau.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

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