X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Ffirewire%2Fohci.c;h=76b321bb73f9419aa52c826a944047388d53cd0a;hb=ada3fa15057205b7d3f727bba5cd26b5912e350f;hp=ecddd11b797a366d105763656dd4eda2c2273add;hpb=71c4c8b7c3bdeccef4f478c643a9ff382ec07241;p=mv-sheeva.git

diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index ecddd11b797..76b321bb73f 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -34,6 +34,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/pci.h>
+#include <linux/pci_ids.h>
 #include <linux/spinlock.h>
 #include <linux/string.h>
 
@@ -2372,6 +2373,9 @@ static void ohci_pmac_off(struct pci_dev *dev)
 #define ohci_pmac_off(dev)
 #endif /* CONFIG_PPC_PMAC */
 
+#define PCI_VENDOR_ID_AGERE		PCI_VENDOR_ID_ATT
+#define PCI_DEVICE_ID_AGERE_FW643	0x5901
+
 static int __devinit pci_probe(struct pci_dev *dev,
 			       const struct pci_device_id *ent)
 {
@@ -2422,6 +2426,16 @@ static int __devinit pci_probe(struct pci_dev *dev,
 	version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
 	ohci->use_dualbuffer = version >= OHCI_VERSION_1_1;
 
+	/* dual-buffer mode is broken if more than one IR context is active */
+	if (dev->vendor == PCI_VENDOR_ID_AGERE &&
+	    dev->device == PCI_DEVICE_ID_AGERE_FW643)
+		ohci->use_dualbuffer = false;
+
+	/* dual-buffer mode is broken */
+	if (dev->vendor == PCI_VENDOR_ID_RICOH &&
+	    dev->device == PCI_DEVICE_ID_RICOH_R5C832)
+		ohci->use_dualbuffer = false;
+
 /* x86-32 currently doesn't use highmem for dma_alloc_coherent */
 #if !defined(CONFIG_X86_32)
 	/* dual-buffer mode is broken with descriptor addresses above 2G */