From: Akinobu Mita <akinobu.mita@gmail.com>
Date: Tue, 18 Nov 2014 14:02:46 +0000 (+0900)
Subject: ufs: fix NULL dereference when no regulators are defined
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~54^2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3e660fbef96f53d01ba022b1b75b72759a02983e;p=pandora-kernel.git

ufs: fix NULL dereference when no regulators are defined

If no voltage supply regulators are defined for the UFS devices (assumed
they are always-on), ufshcd_config_vreg_load() can be called on
suspend/resume paths with vreg == NULL as hba->vreg_info.vcc* equal to
NULL, and it causes NULL pointer dereference.

This fixes it by making ufshcd_config_vreg_{h,l}pm noop when no regulators
are defined.

Signed-off-by: Akinobu Mita <mita@fixstars.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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