From: Stefan Richter Date: Tue, 22 Jul 2008 16:41:10 +0000 (+0200) Subject: firewire: fw-ohci: TSB43AB22/A dualbuffer workaround X-Git-Tag: v2.6.27-rc1~54^2~2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=95984f62c9b0bf6d89ef4f514b1afe73623481de;p=pandora-kernel.git firewire: fw-ohci: TSB43AB22/A dualbuffer workaround Isochronous reception in dualbuffer mode is reportedly broken with TI TSB43AB22A on x86-64. Descriptor addresses above 2G have been determined as the trigger: https://bugzilla.redhat.com/show_bug.cgi?id=435550 Two fixes are possible: - pci_set_consistent_dma_mask(pdev, DMA_31BIT_MASK); at least when IR descriptors are allocated, or - simply don't use dualbuffer. This fix implements the latter workaround. But we keep using dualbuffer on x86-32 which won't give us highmen (and thus physical addresses outside the 31bit range) in coherent DMA memory allocations. Right now we could for example also whitelist PPC32, but DMA mapping implementation details are expected to change there. Signed-off-by: Stefan Richter Signed-off-by: Jarod Wilson --- Reading git-diff-tree failed