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 <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jarod Wilson <jwilson@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 65953822c9cb..720d67554106 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -748,6 +748,7 @@
 #define PCI_VENDOR_ID_TI                0x104c
 #define PCI_DEVICE_ID_TI_TVP4020        0x3d07
 #define PCI_DEVICE_ID_TI_4450           0x8011
+#define PCI_DEVICE_ID_TI_TSB43AB22      0x8023
 #define PCI_DEVICE_ID_TI_XX21_XX11      0x8031
 #define PCI_DEVICE_ID_TI_XX21_XX11_FM   0x8033
 #define PCI_DEVICE_ID_TI_XX21_XX11_SD   0x8034