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>
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 302f5bf..153f555 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -295,7 +295,7 @@
* 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);