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authorRitesh Harjani <ritesh.harjani@gmail.com>2014-04-21 12:17:27 +0530
committerMarek Szyprowski <m.szyprowski@samsung.com>2014-04-23 15:07:00 +0200
commit59f0f119e85cfb173db518328b55efbac4087c9f (patch)
treece1fd9cb76f71d311b5aae727aa9045d636f0a9e /arch
parenta798c10faf62a505d24e5f6213fbaf904a39623f (diff)
downloadlinux-59f0f119e85cfb173db518328b55efbac4087c9f.tar.bz2
arm: dma-mapping: Fix mapping size value
68efd7d2fb("arm: dma-mapping: remove order parameter from arm_iommu_create_mapping()") is causing kernel panic because it wrongly sets the value of mapping->size: Unable to handle kernel NULL pointer dereference at virtual address 000000a0 pgd = e7a84000 [000000a0] *pgd=00000000 ... PC is at bitmap_clear+0x48/0xd0 LR is at __iommu_remove_mapping+0x130/0x164 Fix it by correcting mapping->size value. Signed-off-by: Ritesh Harjani <ritesh.harjani@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mm/dma-mapping.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index f62aa0677e5c..6b00be1f971e 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1963,8 +1963,8 @@ arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size)
mapping->nr_bitmaps = 1;
mapping->extensions = extensions;
mapping->base = base;
- mapping->size = bitmap_size << PAGE_SHIFT;
mapping->bits = BITS_PER_BYTE * bitmap_size;
+ mapping->size = mapping->bits << PAGE_SHIFT;
spin_lock_init(&mapping->lock);