From: Pali Rohár <pali.rohar@gmail.com>
Date: Tue, 23 Jun 2015 08:11:19 +0000 (+0200)
Subject: dell-laptop: Fix allocating & freeing SMI buffer page
X-Git-Tag: v3.2.71~59
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0f133f3c8d8d31a85bc2e5d0115c8bc6eca2225e;p=pandora-kernel.git

dell-laptop: Fix allocating & freeing SMI buffer page

commit b8830a4e71b15d0364ac8e6c55301eea73f211da upstream.

This commit fix kernel crash when probing for rfkill devices in dell-laptop
driver failed. Function free_page() was incorrectly used on struct page *
instead of virtual address of SMI buffer.

This commit also simplify allocating page for SMI buffer by using
__get_free_page() function instead of sequential call of functions
alloc_page() and page_address().

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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