tree 4acec6d605d2c04294afa8d5a7699430c34e8449
parent ec9a13cdbfc8cf29502096ca69b65f07184a9b2c
author Stefan Richter <stefanr@s5r6.in-berlin.de> 1228864838 +0100
committer Stefan Richter <stefanr@s5r6.in-berlin.de> 1228909534 +0100

firewire: fw-ohci: fix IOMMU resource exhaustion

There is a DMA map/ unmap imbalance whenever a block write request
packet is sent and then dequeued with ohci_cancel_packet.  The latter
may happen frequently if the AR resp tasklet is executed before the AT
req tasklet for the same transaction.

Add the missing dma_unmap_single.  This fixes
https://bugzilla.redhat.com/show_bug.cgi?id=475156

Reported-by: Emmanuel Kowalski
Tested-by: Emmanuel Kowalski
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>