The CPU must not touch the buffer after it was DMA-mapped.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
---
drivers/firewire/fw-ohci.c | 1 +
1 file changed, 1 insertion(+)
Index: linux/drivers/firewire/fw-ohci.c
===================================================================
--- linux.orig/drivers/firewire/fw-ohci.c
+++ linux/drivers/firewire/fw-ohci.c
@@ -258,6 +258,7 @@ static int ar_context_add_page(struct ar
free_page((unsigned long) ab);
return -ENOMEM;
}
+ dma_sync_single_for_cpu(dev, ab_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
memset(&ab->descriptor, 0, sizeof(ab->descriptor));
ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE |
--
Stefan Richter
-=====-=-=== =-=- =----
http://arcgraph.de/sr/
-
