diff mbox

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

Message ID 1337017796-27267-1-git-send-email-vitalya@ti.com
State Accepted
Commit 61f6c7a47a2f84b7ba4b65240ffe9247df772b06
Headers show

Commit Message

Vitaly Andrianov May 14, 2012, 5:49 p.m. UTC 
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>
---
 arch/arm/mm/dma-mapping.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
diff mbox

Patch

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 446dc1b..d220d4f 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -414,7 +414,7 @@  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);