Commit 61f6c7a4 authored May 14, 2012 by Vitaly Andrianov Committed by Marek Szyprowski May 21, 2012

ARM: dma-mapping: use PMD size for section unmap

The dma_contiguous_remap() function clears existing section maps using
the wrong size (PGDIR_SIZE instead of PMD_SIZE). This is a bug which
does not affect non-LPAE systems, where PGDIR_SIZE and PMD_SIZE are the same.
On LPAE systems, however, this bug causes the kernel to hang at this point.

This fix has been tested on both LPAE and non-LPAE kernel builds.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

parent 58f42fd5

arch/arm/mm/dma-mapping.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -295,7 +295,7 @@ void __init dma_contiguous_remap(void)
		* Clear previous low-memory mapping
		*/
		for (addr = __phys_to_virt(start); addr < __phys_to_virt(end);
		addr += PGDIR_SIZE)
		addr += PMD_SIZE)
		pmd_clear(pmd_off_k(addr));

		iotable_init(&map, 1);