From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Tue, 16 Dec 2008 19:34:23 +0000 (+0100)
Subject: firewire: fw-ohci: fix IOMMU resource exhaustion
X-Git-Tag: v2.6.27.10~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc7c91468b80aab044dd9dd61c3492cf57dffabb;p=pandora-kernel.git

firewire: fw-ohci: fix IOMMU resource exhaustion

commit 1d1dc5e83f3299c108a4e44d58cc4bfef48c876a upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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