From: Greg Ungerer <[email protected]> The dma cache support functions do not currently support the direction flag DMA_BIDIRECTIONAL. If a driver passes this direction to dma_map_single or friends you will get console output like this:
dma_sync_single_for_device: unsupported dir 0 For example when using the Intel e100 ethernet driver on a ColdFire platform with PCI bus. You will get a stream of these messages coming out. Modify the dma cache support code adding support for DMA_BIDIRECTIONAL. It is actioned by doing a cache push operation. Signed-off-by: Greg Ungerer <[email protected]> --- arch/m68k/kernel/dma.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c index 27b5821..e546a55 100644 --- a/arch/m68k/kernel/dma.c +++ b/arch/m68k/kernel/dma.c @@ -105,6 +105,7 @@ void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { switch (dir) { + case DMA_BIDIRECTIONAL: case DMA_TO_DEVICE: cache_push(handle, size); break; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-m68k" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
