path: root/include/linux/firewire.h
diff options
authorStefan Richter <stefanr@s5r6.in-berlin.de>2009-10-14 20:40:10 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2009-10-31 11:40:51 +0100
commit19593ffdb6daa6ba691d247a2400cece12687c52 (patch)
tree18c3508bbdb5f2d1b1bf51ac653ec580043a9340 /include/linux/firewire.h
parent5b189bf3633c3b73d4f08124a86f3e019953d412 (diff)
firewire: ohci: 0 may be a valid DMA address
I was told that there are obscure architectures with non-coherent DMA which may DMA-map to bus address 0. We shall not use 0 as a magic number of uninitialized bus address variables. The packet->payload_length > 0 test cannot be used either (except in at_context_queue_packet) because local requests are not DMA-mapped regardless of payload_length. Hence add a state flag to struct fw_packet. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'include/linux/firewire.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/firewire.h b/include/linux/firewire.h
index 211a5d7d87b3..9416a461b696 100644
--- a/include/linux/firewire.h
+++ b/include/linux/firewire.h
@@ -267,6 +267,7 @@ struct fw_packet {
void *payload;
size_t payload_length;
dma_addr_t payload_bus;
+ bool payload_mapped;
u32 timestamp;

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