diff options
| author | Russell King <[email protected]> | 2013-01-19 11:05:57 +0000 |
|---|---|---|
| committer | Russell King <[email protected]> | 2013-01-19 11:05:57 +0000 |
| commit | 15653371c67c3fbe359ae37b720639dd4c7b42c5 (patch) | |
| tree | e92cba77b7796993d2cce4af22b9022196c9211a /lib/string_helpers.c | |
| parent | 6f16f4998f98e42e3f2dedf663cfb691ff0324af (diff) | |
ARM: DMA: Fix struct page iterator in dma_cache_maint() to work with sparsemem
Subhash Jadavani reported this partial backtrace:
Now consider this call stack from MMC block driver (this is on the ARMv7
based board):
[<c001b50c>] (v7_dma_inv_range+0x30/0x48) from [<c0017b8c>] (dma_cache_maint_page+0x1c4/0x24c)
[<c0017b8c>] (dma_cache_maint_page+0x1c4/0x24c) from [<c0017c28>] (___dma_page_cpu_to_dev+0x14/0x1c)
[<c0017c28>] (___dma_page_cpu_to_dev+0x14/0x1c) from [<c0017ff8>] (dma_map_sg+0x3c/0x114)
This is caused by incrementing the struct page pointer, and running off
the end of the sparsemem page array. Fix this by incrementing by pfn
instead, and convert the pfn to a struct page.
Cc: <[email protected]>
Suggested-by: James Bottomley <[email protected]>
Tested-by: Subhash Jadavani <[email protected]>
Signed-off-by: Russell King <[email protected]>
Diffstat (limited to 'lib/string_helpers.c')
0 files changed, 0 insertions, 0 deletions