1 files changed, 24 insertions, 13 deletions

diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index 333b12544dd..a4eff32621b 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -171,7 +171,6 @@ struct iso_context {
 struct fw_ohci {
         struct fw_card card;
 
-        u32 version;
         __iomem char *registers;
         dma_addr_t self_id_bus;
         __le32 *self_id_cpu;
@@ -180,6 +179,8 @@ struct fw_ohci {
         int generation;
         int request_generation; /* for timestamping incoming requests */
         u32 bus_seconds;
+
+        bool use_dualbuffer;
         bool old_uninorth;
         bool bus_reset_packet_quirk;
 
@@ -1885,7 +1886,7 @@ ohci_allocate_iso_context(struct fw_card *card, int type, size_t header_size)
         } else {
                 mask = &ohci->ir_context_mask;
                 list = ohci->ir_context_list;
-                if (ohci->version >= OHCI_VERSION_1_1)
+                if (ohci->use_dualbuffer)
                         callback = handle_ir_dualbuffer_packet;
                 else
                         callback = handle_ir_packet_per_buffer;
@@ -1949,7 +1950,7 @@ static int ohci_start_iso(struct fw_iso_context *base,
         } else {
                 index = ctx - ohci->ir_context_list;
                 control = IR_CONTEXT_ISOCH_HEADER;
-                if (ohci->version >= OHCI_VERSION_1_1)
+                if (ohci->use_dualbuffer)
                         control |= IR_CONTEXT_DUAL_BUFFER_MODE;
                 match = (tags << 28) | (sync << 8) | ctx->base.channel;
                 if (cycle >= 0) {
@@ -2279,7 +2280,7 @@ ohci_queue_iso(struct fw_iso_context *base,
         spin_lock_irqsave(&ctx->context.ohci->lock, flags);
         if (base->type == FW_ISO_CONTEXT_TRANSMIT)
                 retval = ohci_queue_iso_transmit(base, packet, buffer, payload);
-        else if (ctx->context.ohci->version >= OHCI_VERSION_1_1)
+        else if (ctx->context.ohci->use_dualbuffer)
                 retval = ohci_queue_iso_receive_dualbuffer(base, packet,
                                                          buffer, payload);
         else
@@ -2341,7 +2342,7 @@ static int __devinit
 pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 {
         struct fw_ohci *ohci;
-        u32 bus_options, max_receive, link_speed;
+        u32 bus_options, max_receive, link_speed, version;
         u64 guid;
         int err;
         size_t size;
@@ -2366,12 +2367,6 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
         pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0);
         pci_set_drvdata(dev, ohci);
 
-#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
-        ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
-                             dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
-#endif
-        ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI;
-
         spin_lock_init(&ohci->lock);
 
         tasklet_init(&ohci->bus_reset_tasklet,
@@ -2390,6 +2385,23 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
                 goto fail_iomem;
         }
 
+        version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
+        ohci->use_dualbuffer = version >= OHCI_VERSION_1_1;
+
+/* 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 */
+        if (dev->vendor == PCI_VENDOR_ID_TI &&
+            dev->device == PCI_DEVICE_ID_TI_TSB43AB22)
+                ohci->use_dualbuffer = false;
+#endif
+
+#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
+        ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
+                             dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
+#endif
+        ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI;
+
         ar_context_init(&ohci->ar_request_ctx, ohci,
                         OHCI1394_AsReqRcvContextControlSet);
 
@@ -2441,9 +2453,8 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
         if (err < 0)
                 goto fail_self_id;
 
-        ohci->version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
         fw_notify("Added fw-ohci device %s, OHCI version %x.%x\n",
-                  dev->dev.bus_id, ohci->version >> 16, ohci->version & 0xff);
+                  dev->dev.bus_id, version >> 16, version & 0xff);
         return 0;
 
  fail_self_id: