FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-17 14:30:00 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

dma-mapping: fix sync_single_range_* DMA debugging

Browse Source 
Commit 5fd75a7850 (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>
This commit is contained in:
Clemens Ladisch 2011-10-31 17:06:28 -07:00 committed by Linus Torvalds
parent 1a4ceab195
commit 07a723097c
1 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
include/asm-generic/dma-mapping-common.h
View File

@ -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