dell-laptop: Fix allocating & freeing SMI buffer page

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commit b8830a4e71 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Pali Rohár 2015-06-23 10:11:19 +02:00 • committed by Greg Kroah-Hartman

parent a35b0d6cc0

commit 4e5c0806a1

1 changed files with 3 additions and 5 deletions

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drivers/platform/x86/dell-laptop.c

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