On Sat, 15 Oct 2011 23:09:51 +0200 Clemens Ladisch <clemens@xxxxxxxxxx> wrote: > 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. > > Signed-off-by: Clemens Ladisch <clemens@xxxxxxxxxx> > --- > include/asm-generic/dma-mapping-common.h | 14 ++++++++++++-- > 1 files changed, 12 insertions(+), 2 deletions(-) Acked-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
