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authorClemens Ladisch <clemens@ladisch.de>2011-10-31 17:06:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-31 17:30:44 -0700
commit07a723097cd31e9c2def69ac4d42834a16f79219 (patch)
tree122c4c9e567dfe453fa4a948a648f0f26e381556 /include/asm-generic
parent1a4ceab195e66bce9c1638fdded6d92988100ba4 (diff)
downloadlinux-linaro-stable-07a723097cd31e9c2def69ac4d42834a16f79219.tar.gz
dma-mapping: fix sync_single_range_* DMA debugging
Commit 5fd75a7850b5 (dma-mapping: remove unnecessary sync_single_range_* in dma_map_ops) unified not only the dma_map_ops but also the corresponding debug_dma_sync_* calls. This led to spurious WARN()ings like the following because the DMA debug code was no longer able to detect the DMA buffer base address without the separate offset parameter: WARNING: at lib/dma-debug.c:911 check_sync+0xce/0x446() firewire_ohci 0000:04:00.0: DMA-API: device driver tries to sync DMA memory it has not allocated [device address=0x00000000cedaa400] [size=1024 bytes] Call Trace: ... [<ffffffff811326a5>] check_sync+0xce/0x446 [<ffffffff81132ad9>] debug_dma_sync_single_for_device+0x39/0x3b [<ffffffffa01d6e6a>] ohci_queue_iso+0x4f3/0x77d [firewire_ohci] ... To fix this, unshare the sync_single_* and sync_single_range_* implementations so that we are able to call the correct debug_dma_sync_* functions. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/dma-mapping-common.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h
index 0c80bb38773f..9fa3f96e38cf 100644
--- a/include/asm-generic/dma-mapping-common.h
+++ b/include/asm-generic/dma-mapping-common.h
@@ -123,7 +123,12 @@ static inline void dma_sync_single_range_for_cpu(struct device *dev,
size_t size,
enum dma_data_direction dir)
{
- dma_sync_single_for_cpu(dev, addr + offset, size, dir);
+ const struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops->sync_single_for_cpu)
+ ops->sync_single_for_cpu(dev, addr + offset, size, dir);
+ debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
}
static inline void dma_sync_single_range_for_device(struct device *dev,
@@ -132,7 +137,12 @@ static inline void dma_sync_single_range_for_device(struct device *dev,
size_t size,
enum dma_data_direction dir)
{
- dma_sync_single_for_device(dev, addr + offset, size, dir);
+ const struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops->sync_single_for_device)
+ ops->sync_single_for_device(dev, addr + offset, size, dir);
+ debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
}
static inline void