Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  firewire: state userland requirements in Kconfig help
  firewire: avoid memleak after phy config transmit failure
  firewire: fw-ohci: TSB43AB22/A dualbuffer workaround
  firewire: queue the right number of data
  firewire: warn on unfinished transactions during card removal
  firewire: small fw_fill_request cleanup
  firewire: fully initialize fw_transaction before marking it pending
  firewire: fix race of bus reset with request transmission

6 files changed, 65 insertions, 70 deletions

diff --git a/drivers/firewire/Kconfig b/drivers/firewire/Kconfig
index 76f26710fc16..fa6d6abefd4d 100644
--- a/drivers/firewire/Kconfig
+++ b/drivers/firewire/Kconfig
@@ -16,8 +16,13 @@ config FIREWIRE
           enable the new stack.
 
           To compile this driver as a module, say M here: the module will be
-          called firewire-core.  It functionally replaces ieee1394, raw1394,
-          and video1394.
+          called firewire-core.
+
+          This module functionally replaces ieee1394, raw1394, and video1394.
+          To access it from application programs, you generally need at least
+          libraw1394 version 2.  IIDC/DCAM applications also need libdc1394
+          version 2.  No libraries are required to access storage devices
+          through the firewire-sbp2 driver.
 
 config FIREWIRE_OHCI
         tristate "OHCI-1394 controllers"
diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index da873d795aad..bbd73a406e53 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -539,7 +539,7 @@ fw_core_remove_card(struct fw_card *card)
         wait_for_completion(&card->done);
 
         cancel_delayed_work_sync(&card->work);
-        fw_flush_transactions(card);
+        WARN_ON(!list_empty(&card->transaction_list));
         del_timer_sync(&card->flush_timer);
 }
 EXPORT_SYMBOL(fw_core_remove_card);
diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c
index c639915fc3cb..bc81d6fcd2fd 100644
--- a/drivers/firewire/fw-cdev.c
+++ b/drivers/firewire/fw-cdev.c
@@ -382,9 +382,9 @@ complete_transaction(struct fw_card *card, int rcode,
 
         response->response.type   = FW_CDEV_EVENT_RESPONSE;
         response->response.rcode  = rcode;
-        queue_event(client, &response->event,
-                    &response->response, sizeof(response->response),
-                    response->response.data, response->response.length);
+        queue_event(client, &response->event, &response->response,
+                    sizeof(response->response) + response->response.length,
+                    NULL, 0);
 }
 
 static int ioctl_send_request(struct client *client, void *buffer)
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index 566672e0bcff..251416f2148f 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:
diff --git a/drivers/firewire/fw-topology.c b/drivers/firewire/fw-topology.c
index 213b0ff8f3d6..c1b81077c4a8 100644
--- a/drivers/firewire/fw-topology.c
+++ b/drivers/firewire/fw-topology.c
@@ -510,8 +510,6 @@ fw_core_handle_bus_reset(struct fw_card *card,
         struct fw_node *local_node;
         unsigned long flags;
 
-        fw_flush_transactions(card);
-
         spin_lock_irqsave(&card->lock, flags);
 
         /*
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index 40db80752272..e5d1a0b64fcf 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -22,6 +22,7 @@
 #include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/pci.h>
@@ -151,7 +152,7 @@ transmit_complete_callback(struct fw_packet *packet,
 
 static void
 fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
-                int node_id, int source_id, int generation, int speed,
+                int destination_id, int source_id, int generation, int speed,
                 unsigned long long offset, void *payload, size_t length)
 {
         int ext_tcode;
@@ -166,7 +167,7 @@ fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
                 HEADER_RETRY(RETRY_X) |
                 HEADER_TLABEL(tlabel) |
                 HEADER_TCODE(tcode) |
-                HEADER_DESTINATION(node_id);
+                HEADER_DESTINATION(destination_id);
         packet->header[1] =
                 HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
         packet->header[2] =
@@ -252,7 +253,7 @@ fw_send_request(struct fw_card *card, struct fw_transaction *t,
                 fw_transaction_callback_t callback, void *callback_data)
 {
         unsigned long flags;
-        int tlabel, source;
+        int tlabel;
 
         /*
          * Bump the flush timer up 100ms first of all so we
@@ -268,7 +269,6 @@ fw_send_request(struct fw_card *card, struct fw_transaction *t,
 
         spin_lock_irqsave(&card->lock, flags);
 
-        source = card->node_id;
         tlabel = card->current_tlabel;
         if (card->tlabel_mask & (1 << tlabel)) {
                 spin_unlock_irqrestore(&card->lock, flags);
@@ -279,77 +279,58 @@ fw_send_request(struct fw_card *card, struct fw_transaction *t,
         card->current_tlabel = (card->current_tlabel + 1) & 0x1f;
         card->tlabel_mask |= (1 << tlabel);
 
-        list_add_tail(&t->link, &card->transaction_list);
-
-        spin_unlock_irqrestore(&card->lock, flags);
-
-        /* Initialize rest of transaction, fill out packet and send it. */
         t->node_id = node_id;
         t->tlabel = tlabel;
         t->callback = callback;
         t->callback_data = callback_data;
 
-        fw_fill_request(&t->packet, tcode, t->tlabel,
-                        node_id, source, generation,
-                        speed, offset, payload, length);
+        fw_fill_request(&t->packet, tcode, t->tlabel, node_id, card->node_id,
+                        generation, speed, offset, payload, length);
         t->packet.callback = transmit_complete_callback;
 
+        list_add_tail(&t->link, &card->transaction_list);
+
+        spin_unlock_irqrestore(&card->lock, flags);
+
         card->driver->send_request(card, &t->packet);
 }
 EXPORT_SYMBOL(fw_send_request);
 
-struct fw_phy_packet {
-        struct fw_packet packet;
-        struct completion done;
-        struct kref kref;
-};
-
-static void phy_packet_release(struct kref *kref)
-{
-        struct fw_phy_packet *p =
-                        container_of(kref, struct fw_phy_packet, kref);
-        kfree(p);
-}
+static DEFINE_MUTEX(phy_config_mutex);
+static DECLARE_COMPLETION(phy_config_done);
 
 static void transmit_phy_packet_callback(struct fw_packet *packet,
                                          struct fw_card *card, int status)
 {
-        struct fw_phy_packet *p =
-                        container_of(packet, struct fw_phy_packet, packet);
-
-        complete(&p->done);
-        kref_put(&p->kref, phy_packet_release);
+        complete(&phy_config_done);
 }
 
+static struct fw_packet phy_config_packet = {
+        .header_length  = 8,
+        .payload_length = 0,
+        .speed          = SCODE_100,
+        .callback       = transmit_phy_packet_callback,
+};
+
 void fw_send_phy_config(struct fw_card *card,
                         int node_id, int generation, int gap_count)
 {
-        struct fw_phy_packet *p;
         long timeout = DIV_ROUND_UP(HZ, 10);
         u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG) |
                    PHY_CONFIG_ROOT_ID(node_id) |
                    PHY_CONFIG_GAP_COUNT(gap_count);
 
-        p = kmalloc(sizeof(*p), GFP_KERNEL);
-        if (p == NULL)
-                return;
+        mutex_lock(&phy_config_mutex);
+
+        phy_config_packet.header[0] = data;
+        phy_config_packet.header[1] = ~data;
+        phy_config_packet.generation = generation;
+        INIT_COMPLETION(phy_config_done);
+
+        card->driver->send_request(card, &phy_config_packet);
+        wait_for_completion_timeout(&phy_config_done, timeout);
 
-        p->packet.header[0] = data;
-        p->packet.header[1] = ~data;
-        p->packet.header_length = 8;
-        p->packet.payload_length = 0;
-        p->packet.speed = SCODE_100;
-        p->packet.generation = generation;
-        p->packet.callback = transmit_phy_packet_callback;
-        init_completion(&p->done);
-        kref_set(&p->kref, 2);
-
-        card->driver->send_request(card, &p->packet);
-        timeout = wait_for_completion_timeout(&p->done, timeout);
-        kref_put(&p->kref, phy_packet_release);
-
-        /* will leak p if the callback is never executed */
-        WARN_ON(timeout == 0);
+        mutex_unlock(&phy_config_mutex);
 }
 
 void fw_flush_transactions(struct fw_card *card)