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@@ -34,6 +34,7 @@
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/pci.h>
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+#include <linux/pci_ids.h>
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#include <linux/spinlock.h>
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#include <linux/string.h>
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@@ -2372,6 +2373,9 @@ static void ohci_pmac_off(struct pci_dev *dev)
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#define ohci_pmac_off(dev)
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#endif /* CONFIG_PPC_PMAC */
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+#define PCI_VENDOR_ID_AGERE PCI_VENDOR_ID_ATT
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+#define PCI_DEVICE_ID_AGERE_FW643 0x5901
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+
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static int __devinit pci_probe(struct pci_dev *dev,
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const struct pci_device_id *ent)
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{
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@@ -2422,6 +2426,16 @@ static int __devinit pci_probe(struct pci_dev *dev,
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version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
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ohci->use_dualbuffer = version >= OHCI_VERSION_1_1;
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+ /* dual-buffer mode is broken if more than one IR context is active */
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+ if (dev->vendor == PCI_VENDOR_ID_AGERE &&
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+ dev->device == PCI_DEVICE_ID_AGERE_FW643)
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+ ohci->use_dualbuffer = false;
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+
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+ /* dual-buffer mode is broken */
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+ if (dev->vendor == PCI_VENDOR_ID_RICOH &&
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+ dev->device == PCI_DEVICE_ID_RICOH_R5C832)
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+ ohci->use_dualbuffer = false;
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+
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/* x86-32 currently doesn't use highmem for dma_alloc_coherent */
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#if !defined(CONFIG_X86_32)
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/* dual-buffer mode is broken with descriptor addresses above 2G */
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