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, ieee1394: update Kconfig help
  firewire, ieee1394: update MAINTAINERS entries
  firewire: ohci: always use packet-per-buffer mode for isochronous reception
  firewire: cdev: fix another memory leak in an error path
  firewire: fix use of multiple AV/C devices, allow multiple FCP listeners

Comments from Stefan:

   Distributors who still ship the old stack (ieee1394, ohci1394,
   raw1394, sbp2, eth1394 and more) should now switch to the new one
   (firewire-core, firewire-ohci, firewire-sbp2, firewire-net).  In the
   first iteration, those distributors might want to ship the old stack
   also (but blacklisted) as a fallback for their users if unforeseen
   problems with the newer replacement drivers are encountered.

   The older FireWire stack contains several known problems which are
   not going to be fixed; instead, those issues are addressed by the new
   stack.  An incomplete list of these issues is kept in bugzilla:

	http://bugzilla.kernel.org/show_bug.cgi?id=10046

   We have a guide on migration from the older to the newer stack:

	http://ieee1394.wiki.kernel.org/index.php/Juju_Migration

7 files changed, 174 insertions, 92 deletions

diff --git a/drivers/Kconfig b/drivers/Kconfig
index 8a07363417ed..368ae6d3a096 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -28,7 +28,7 @@ source "drivers/md/Kconfig"
 
 source "drivers/message/fusion/Kconfig"
 
-source "drivers/ieee1394/Kconfig"
+source "drivers/firewire/Kconfig"
 
 source "drivers/message/i2o/Kconfig"
 
diff --git a/drivers/firewire/Kconfig b/drivers/firewire/Kconfig
index 13efcd362072..a9371b36a9b9 100644
--- a/drivers/firewire/Kconfig
+++ b/drivers/firewire/Kconfig
@@ -1,5 +1,10 @@
+menu "IEEE 1394 (FireWire) support"
+        depends on PCI || BROKEN
+        # firewire-core does not depend on PCI but is
+        # not useful without PCI controller driver
+
 comment "You can enable one or both FireWire driver stacks."
-comment "See the help texts for more information."
+comment "The newer stack is recommended."
 
 config FIREWIRE
         tristate "FireWire driver stack"
@@ -15,16 +20,6 @@ config FIREWIRE
           To compile this driver as a module, say M here: the module will be
           called firewire-core.
 
-          This module functionally replaces ieee1394, raw1394, and video1394.
-          To access it from application programs, you generally need at least
-          libraw1394 v2.  IIDC/DCAM applications need libdc1394 v2.
-          No libraries are required to access storage devices through the
-          firewire-sbp2 driver.
-
-          NOTE:
-          FireWire audio devices currently require the old drivers (ieee1394,
-          ohci1394, raw1394).
-
 config FIREWIRE_OHCI
         tristate "OHCI-1394 controllers"
         depends on PCI && FIREWIRE
@@ -34,22 +29,7 @@ config FIREWIRE_OHCI
           is the only chipset in use, so say Y here.
 
           To compile this driver as a module, say M here:  The module will be
-          called firewire-ohci.  It replaces ohci1394 of the classic IEEE 1394
-          stack.
-
-          NOTE:
-          If you want to install firewire-ohci and ohci1394 together, you
-          should configure them only as modules and blacklist the driver(s)
-          which you don't want to have auto-loaded.  Add either
-
-              blacklist firewire-ohci
-          or
-              blacklist ohci1394
-              blacklist video1394
-              blacklist dv1394
-
-          to /etc/modprobe.conf or /etc/modprobe.d/* and update modprobe.conf
-          depending on your distribution.
+          called firewire-ohci.
 
 config FIREWIRE_OHCI_DEBUG
         bool
@@ -66,8 +46,7 @@ config FIREWIRE_SBP2
           like scanners.
 
           To compile this driver as a module, say M here:  The module will be
-          called firewire-sbp2.  It replaces sbp2 of the classic IEEE 1394
-          stack.
+          called firewire-sbp2.
 
           You should also enable support for disks, CD-ROMs, etc. in the SCSI
           configuration section.
@@ -83,5 +62,8 @@ config FIREWIRE_NET
           NOTE, this driver is not stable yet!
 
           To compile this driver as a module, say M here:  The module will be
-          called firewire-net.  It replaces eth1394 of the classic IEEE 1394
-          stack.
+          called firewire-net.
+
+source "drivers/ieee1394/Kconfig"
+
+endmenu
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index 231e6ee5ba43..e6d63849e78e 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -601,8 +601,9 @@ static void release_request(struct client *client,
         struct inbound_transaction_resource *r = container_of(resource,
                         struct inbound_transaction_resource, resource);
 
-        fw_send_response(client->device->card, r->request,
-                         RCODE_CONFLICT_ERROR);
+        if (r->request)
+                fw_send_response(client->device->card, r->request,
+                                 RCODE_CONFLICT_ERROR);
         kfree(r);
 }
 
@@ -645,7 +646,8 @@ static void handle_request(struct fw_card *card, struct fw_request *request,
  failed:
         kfree(r);
         kfree(e);
-        fw_send_response(card, request, RCODE_CONFLICT_ERROR);
+        if (request)
+                fw_send_response(card, request, RCODE_CONFLICT_ERROR);
 }
 
 static void release_address_handler(struct client *client,
@@ -715,15 +717,18 @@ static int ioctl_send_response(struct client *client, void *buffer)
 
         r = container_of(resource, struct inbound_transaction_resource,
                          resource);
-        if (request->length < r->length)
-                r->length = request->length;
-
-        if (copy_from_user(r->data, u64_to_uptr(request->data), r->length)) {
-                ret = -EFAULT;
-                goto out;
+        if (r->request) {
+                if (request->length < r->length)
+                        r->length = request->length;
+                if (copy_from_user(r->data, u64_to_uptr(request->data),
+                                   r->length)) {
+                        ret = -EFAULT;
+                        kfree(r->request);
+                        goto out;
+                }
+                fw_send_response(client->device->card, r->request,
+                                 request->rcode);
         }
-
-        fw_send_response(client->device->card, r->request, request->rcode);
  out:
         kfree(r);
 
diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index 842739df23e2..495849eb13cc 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -432,14 +432,20 @@ static struct fw_address_handler *lookup_overlapping_address_handler(
         return NULL;
 }
 
+static bool is_enclosing_handler(struct fw_address_handler *handler,
+                                 unsigned long long offset, size_t length)
+{
+        return handler->offset <= offset &&
+                offset + length <= handler->offset + handler->length;
+}
+
 static struct fw_address_handler *lookup_enclosing_address_handler(
         struct list_head *list, unsigned long long offset, size_t length)
 {
         struct fw_address_handler *handler;
 
         list_for_each_entry(handler, list, link) {
-                if (handler->offset <= offset &&
-                    offset + length <= handler->offset + handler->length)
+                if (is_enclosing_handler(handler, offset, length))
                         return handler;
         }
 
@@ -465,6 +471,12 @@ const struct fw_address_region fw_unit_space_region =
         { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, };
 #endif  /*  0  */
 
+static bool is_in_fcp_region(u64 offset, size_t length)
+{
+        return offset >= (CSR_REGISTER_BASE | CSR_FCP_COMMAND) &&
+                offset + length <= (CSR_REGISTER_BASE | CSR_FCP_END);
+}
+
 /**
  * fw_core_add_address_handler - register for incoming requests
  * @handler: callback
@@ -477,8 +489,11 @@ const struct fw_address_region fw_unit_space_region =
  * give the details of the particular request.
  *
  * Return value:  0 on success, non-zero otherwise.
+ *
  * The start offset of the handler's address region is determined by
  * fw_core_add_address_handler() and is returned in handler->offset.
+ *
+ * Address allocations are exclusive, except for the FCP registers.
  */
 int fw_core_add_address_handler(struct fw_address_handler *handler,
                                 const struct fw_address_region *region)
@@ -498,10 +513,12 @@ int fw_core_add_address_handler(struct fw_address_handler *handler,
 
         handler->offset = region->start;
         while (handler->offset + handler->length <= region->end) {
-                other =
-                    lookup_overlapping_address_handler(&address_handler_list,
-                                                       handler->offset,
-                                                       handler->length);
+                if (is_in_fcp_region(handler->offset, handler->length))
+                        other = NULL;
+                else
+                        other = lookup_overlapping_address_handler
+                                        (&address_handler_list,
+                                         handler->offset, handler->length);
                 if (other != NULL) {
                         handler->offset += other->length;
                 } else {
@@ -668,6 +685,9 @@ static struct fw_request *allocate_request(struct fw_packet *p)
 void fw_send_response(struct fw_card *card,
                       struct fw_request *request, int rcode)
 {
+        if (WARN_ONCE(!request, "invalid for FCP address handlers"))
+                return;
+
         /* unified transaction or broadcast transaction: don't respond */
         if (request->ack != ACK_PENDING ||
             HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) {
@@ -686,26 +706,15 @@ void fw_send_response(struct fw_card *card,
 }
 EXPORT_SYMBOL(fw_send_response);
 
-void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
+static void handle_exclusive_region_request(struct fw_card *card,
+                                            struct fw_packet *p,
+                                            struct fw_request *request,
+                                            unsigned long long offset)
 {
         struct fw_address_handler *handler;
-        struct fw_request *request;
-        unsigned long long offset;
         unsigned long flags;
         int tcode, destination, source;
 
-        if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
-                return;
-
-        request = allocate_request(p);
-        if (request == NULL) {
-                /* FIXME: send statically allocated busy packet. */
-                return;
-        }
-
-        offset      =
-                ((unsigned long long)
-                 HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2];
         tcode       = HEADER_GET_TCODE(p->header[0]);
         destination = HEADER_GET_DESTINATION(p->header[0]);
         source      = HEADER_GET_SOURCE(p->header[1]);
@@ -732,6 +741,73 @@ void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
                                           request->data, request->length,
                                           handler->callback_data);
 }
+
+static void handle_fcp_region_request(struct fw_card *card,
+                                      struct fw_packet *p,
+                                      struct fw_request *request,
+                                      unsigned long long offset)
+{
+        struct fw_address_handler *handler;
+        unsigned long flags;
+        int tcode, destination, source;
+
+        if ((offset != (CSR_REGISTER_BASE | CSR_FCP_COMMAND) &&
+             offset != (CSR_REGISTER_BASE | CSR_FCP_RESPONSE)) ||
+            request->length > 0x200) {
+                fw_send_response(card, request, RCODE_ADDRESS_ERROR);
+
+                return;
+        }
+
+        tcode       = HEADER_GET_TCODE(p->header[0]);
+        destination = HEADER_GET_DESTINATION(p->header[0]);
+        source      = HEADER_GET_SOURCE(p->header[1]);
+
+        if (tcode != TCODE_WRITE_QUADLET_REQUEST &&
+            tcode != TCODE_WRITE_BLOCK_REQUEST) {
+                fw_send_response(card, request, RCODE_TYPE_ERROR);
+
+                return;
+        }
+
+        spin_lock_irqsave(&address_handler_lock, flags);
+        list_for_each_entry(handler, &address_handler_list, link) {
+                if (is_enclosing_handler(handler, offset, request->length))
+                        handler->address_callback(card, NULL, tcode,
+                                                  destination, source,
+                                                  p->generation, p->speed,
+                                                  offset, request->data,
+                                                  request->length,
+                                                  handler->callback_data);
+        }
+        spin_unlock_irqrestore(&address_handler_lock, flags);
+
+        fw_send_response(card, request, RCODE_COMPLETE);
+}
+
+void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
+{
+        struct fw_request *request;
+        unsigned long long offset;
+
+        if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
+                return;
+
+        request = allocate_request(p);
+        if (request == NULL) {
+                /* FIXME: send statically allocated busy packet. */
+                return;
+        }
+
+        offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) |
+                p->header[2];
+
+        if (!is_in_fcp_region(offset, request->length))
+                handle_exclusive_region_request(card, p, request, offset);
+        else
+                handle_fcp_region_request(card, p, request, offset);
+
+}
 EXPORT_SYMBOL(fw_core_handle_request);
 
 void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 96768e160866..a61571c63c59 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -2226,7 +2226,6 @@ static int ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
         if (rest == 0)
                 return -EINVAL;
 
-        /* FIXME: make packet-per-buffer/dual-buffer a context option */
         while (rest > 0) {
                 d = context_get_descriptors(&ctx->context,
                                             z + header_z, &d_bus);
@@ -2470,7 +2469,10 @@ static int __devinit pci_probe(struct pci_dev *dev,
         }
 
         version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
+#if 0
+        /* FIXME: make it a context option or remove dual-buffer mode */
         ohci->use_dualbuffer = version >= OHCI_VERSION_1_1;
+#endif
 
         /* dual-buffer mode is broken if more than one IR context is active */
         if (dev->vendor == PCI_VENDOR_ID_AGERE &&
diff --git a/drivers/ieee1394/Kconfig b/drivers/ieee1394/Kconfig
index f102fcc7e52a..e02096cf7d95 100644
--- a/drivers/ieee1394/Kconfig
+++ b/drivers/ieee1394/Kconfig
@@ -1,8 +1,3 @@
-menu "IEEE 1394 (FireWire) support"
-        depends on PCI || BROKEN
-
-source "drivers/firewire/Kconfig"
-
 config IEEE1394
         tristate "Legacy alternative FireWire driver stack"
         depends on PCI || BROKEN
@@ -16,8 +11,13 @@ config IEEE1394
           is the core support only, you will also need to select a driver for
           your IEEE 1394 adapter.
 
-          To compile this driver as a module, say M here: the
-          module will be called ieee1394.
+          To compile this driver as a module, say M here: the module will be
+          called ieee1394.
+
+          NOTE:
+          ieee1394 is superseded by the newer firewire-core driver.  See
+          http://ieee1394.wiki.kernel.org/index.php/Juju_Migration for
+          further information on how to switch to the new FireWire drivers.
 
 config IEEE1394_OHCI1394
         tristate "OHCI-1394 controllers"
@@ -29,19 +29,23 @@ config IEEE1394_OHCI1394
           use one of these chipsets.  It should work with any OHCI-1394
           compliant card, however.
 
-          To compile this driver as a module, say M here: the
-          module will be called ohci1394.
+          To compile this driver as a module, say M here: the module will be
+          called ohci1394.
 
           NOTE:
+          ohci1394 is superseded by the newer firewire-ohci driver.  See
+          http://ieee1394.wiki.kernel.org/index.php/Juju_Migration for
+          further information on how to switch to the new FireWire drivers.
+
           If you want to install firewire-ohci and ohci1394 together, you
           should configure them only as modules and blacklist the driver(s)
           which you don't want to have auto-loaded.  Add either
 
-              blacklist firewire-ohci
-          or
               blacklist ohci1394
               blacklist video1394
               blacklist dv1394
+          or
+              blacklist firewire-ohci
 
           to /etc/modprobe.conf or /etc/modprobe.d/* and update modprobe.conf
           depending on your distribution.
@@ -58,8 +62,8 @@ config IEEE1394_PCILYNX
           Instruments PCILynx chip.  Note: this driver is written for revision
           2 of this chip and may not work with revision 0.
 
-          To compile this driver as a module, say M here: the
-          module will be called pcilynx.
+          To compile this driver as a module, say M here: the module will be
+          called pcilynx.
 
           Only some old and now very rare PCI and CardBus cards and
           PowerMacs G3 B&W contain the PCILynx controller.  Therefore
@@ -79,6 +83,14 @@ config IEEE1394_SBP2
           You should also enable support for disks, CD-ROMs, etc. in the SCSI
           configuration section.
 
+          To compile this driver as a module, say M here: the module will be
+          called sbp2.
+
+          NOTE:
+          sbp2 is superseded by the newer firewire-sbp2 driver. See
+          http://ieee1394.wiki.kernel.org/index.php/Juju_Migration for
+          further information on how to switch to the new FireWire drivers.
+
 config IEEE1394_SBP2_PHYS_DMA
         bool "Enable replacement for physical DMA in SBP2"
         depends on IEEE1394_SBP2 && VIRT_TO_BUS && EXPERIMENTAL
@@ -111,6 +123,11 @@ config IEEE1394_ETH1394
 
           The module is called eth1394 although it does not emulate Ethernet.
 
+          NOTE:
+          eth1394 is superseded by the newer firewire-net driver. See
+          http://ieee1394.wiki.kernel.org/index.php/Juju_Migration for
+          further information on how to switch to the new FireWire drivers.
+
 config IEEE1394_RAWIO
         tristate "raw1394 userspace interface"
         depends on IEEE1394
@@ -123,6 +140,11 @@ config IEEE1394_RAWIO
           To compile this driver as a module, say M here: the module will be
           called raw1394.
 
+          NOTE:
+          raw1394 is superseded by the newer firewire-core driver. See
+          http://ieee1394.wiki.kernel.org/index.php/Juju_Migration for
+          further information on how to switch to the new FireWire drivers.
+
 config IEEE1394_VIDEO1394
         tristate "video1394 userspace interface"
         depends on IEEE1394 && IEEE1394_OHCI1394
@@ -136,13 +158,18 @@ config IEEE1394_VIDEO1394
           To compile this driver as a module, say M here: the module will be
           called video1394.
 
+          NOTE:
+          video1394 is superseded by the newer firewire-core driver. See
+          http://ieee1394.wiki.kernel.org/index.php/Juju_Migration for
+          further information on how to switch to the new FireWire drivers.
+
 config IEEE1394_DV1394
         tristate "dv1394 userspace interface (deprecated)"
         depends on IEEE1394 && IEEE1394_OHCI1394
         help
           The dv1394 driver is unsupported and may be removed from Linux in a
-          future release.  Its functionality is now provided by raw1394 together
-          with libraries such as libiec61883.
+          future release.  Its functionality is now provided by either
+          raw1394 or firewire-core together with libraries such as libiec61883.
 
 config IEEE1394_VERBOSEDEBUG
         bool "Excessive debugging output"
@@ -153,5 +180,3 @@ config IEEE1394_VERBOSEDEBUG
           will quickly result in large amounts of data sent to the system log.
 
           Say Y if you really need the debugging output.  Everyone else says N.
-
-endmenu
diff --git a/drivers/media/dvb/firewire/firedtv-fw.c b/drivers/media/dvb/firewire/firedtv-fw.c
index fe44789ab037..6223bf01efe9 100644
--- a/drivers/media/dvb/firewire/firedtv-fw.c
+++ b/drivers/media/dvb/firewire/firedtv-fw.c
@@ -202,14 +202,8 @@ static void handle_fcp(struct fw_card *card, struct fw_request *request,
         unsigned long flags;
         int su;
 
-        if ((tcode != TCODE_WRITE_QUADLET_REQUEST &&
-             tcode != TCODE_WRITE_BLOCK_REQUEST) ||
-            offset != CSR_REGISTER_BASE + CSR_FCP_RESPONSE ||
-            length == 0 ||
-            (((u8 *)payload)[0] & 0xf0) != 0) {
-                fw_send_response(card, request, RCODE_TYPE_ERROR);
+        if (length < 2 || (((u8 *)payload)[0] & 0xf0) != 0)
                 return;
-        }
 
         su = ((u8 *)payload)[1] & 0x7;
 
@@ -230,10 +224,8 @@ static void handle_fcp(struct fw_card *card, struct fw_request *request,
         }
         spin_unlock_irqrestore(&node_list_lock, flags);
 
-        if (fdtv) {
+        if (fdtv)
                 avc_recv(fdtv, payload, length);
-                fw_send_response(card, request, RCODE_COMPLETE);
-        }
 }
 
 static struct fw_address_handler fcp_handler = {