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ttm: Clear the ttm page allocated from high memory zone correctly 

The TTM page can be allocated from high memory. In such case it is
wrong to use the page_address(page) as the virtual address for the high memory
page.

bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=50241

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Zhao Yakui 2012-11-13 18:31:55 +00:00 committed by Dave Airlie
parent 888155bbf6
commit ac207ed247
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/ttm/ttm_page_alloc.c
View File

@ -749,7 +749,10 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
/* clear the pages coming from the pool if requested */
if (flags & TTM_PAGE_FLAG_ZERO_ALLOC) {
list_for_each_entry(p, &plist, lru) {
clear_page(page_address(p));
if (PageHighMem(p))
clear_highpage(p);
else
clear_page(page_address(p));
}
}