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ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr 

When we configure CONFIG_ARM_LPAE=y, pfn << PAGE_SHIFT will
overflow if pfn >= 0x100000 in copy_oldmem_page.
So use __pfn_to_phys for converting.

Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Liu Hua 2014-03-27 06:56:18 +01:00 committed by Russell King
parent c7d442f46c
commit 8fad87bca7
1 changed files with 1 additions and 1 deletions
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2
arch/arm/kernel/crash_dump.c
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@ -39,7 +39,7 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
if (!csize) if (!csize)
return 0; return 0;
vaddr = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE); vaddr = ioremap(__pfn_to_phys(pfn), PAGE_SIZE);
if (!vaddr) if (!vaddr)
return -ENOMEM; return -ENOMEM;