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: fw-sbp2: fix races
  firewire: fw-sbp2: delay first login to avoid retries
  firewire: fw-ohci: initialization failure path fixes
  firewire: fw-ohci: don't leak dma memory on module removal
  firewire: fix struct fw_node memory leak
  firewire: Survive more than 256 bus resets

4 files changed, 73 insertions, 23 deletions

diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index 251416f2148f..8e16bfbdcb3d 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -476,6 +476,7 @@ static int ar_context_add_page(struct ar_context *ctx)
         if (ab == NULL)
                 return -ENOMEM;
 
+        ab->next = NULL;
         memset(&ab->descriptor, 0, sizeof(ab->descriptor));
         ab->descriptor.control        = cpu_to_le16(DESCRIPTOR_INPUT_MORE |
                                                     DESCRIPTOR_STATUS |
@@ -496,6 +497,21 @@ static int ar_context_add_page(struct ar_context *ctx)
         return 0;
 }
 
+static void ar_context_release(struct ar_context *ctx)
+{
+        struct ar_buffer *ab, *ab_next;
+        size_t offset;
+        dma_addr_t ab_bus;
+
+        for (ab = ctx->current_buffer; ab; ab = ab_next) {
+                ab_next = ab->next;
+                offset = offsetof(struct ar_buffer, data);
+                ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset;
+                dma_free_coherent(ctx->ohci->card.device, PAGE_SIZE,
+                                  ab, ab_bus);
+        }
+}
+
 #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
 #define cond_le32_to_cpu(v) \
         (ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v))
@@ -2349,8 +2365,8 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 
         ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
         if (ohci == NULL) {
-                fw_error("Could not malloc fw_ohci data.\n");
-                return -ENOMEM;
+                err = -ENOMEM;
+                goto fail;
         }
 
         fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev);
@@ -2359,7 +2375,7 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 
         err = pci_enable_device(dev);
         if (err) {
-                fw_error("Failed to enable OHCI hardware.\n");
+                fw_error("Failed to enable OHCI hardware\n");
                 goto fail_free;
         }
 
@@ -2427,9 +2443,8 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
         ohci->ir_context_list = kzalloc(size, GFP_KERNEL);
 
         if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) {
-                fw_error("Out of memory for it/ir contexts.\n");
                 err = -ENOMEM;
-                goto fail_registers;
+                goto fail_contexts;
         }
 
         /* self-id dma buffer allocation */
@@ -2438,9 +2453,8 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
                                                &ohci->self_id_bus,
                                                GFP_KERNEL);
         if (ohci->self_id_cpu == NULL) {
-                fw_error("Out of memory for self ID buffer.\n");
                 err = -ENOMEM;
-                goto fail_registers;
+                goto fail_contexts;
         }
 
         bus_options = reg_read(ohci, OHCI1394_BusOptions);
@@ -2460,9 +2474,13 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
  fail_self_id:
         dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE,
                           ohci->self_id_cpu, ohci->self_id_bus);
- fail_registers:
-        kfree(ohci->it_context_list);
+ fail_contexts:
         kfree(ohci->ir_context_list);
+        kfree(ohci->it_context_list);
+        context_release(&ohci->at_response_ctx);
+        context_release(&ohci->at_request_ctx);
+        ar_context_release(&ohci->ar_response_ctx);
+        ar_context_release(&ohci->ar_request_ctx);
         pci_iounmap(dev, ohci->registers);
  fail_iomem:
         pci_release_region(dev, 0);
@@ -2471,6 +2489,9 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
  fail_free:
         kfree(&ohci->card);
         ohci_pmac_off(dev);
+ fail:
+        if (err == -ENOMEM)
+                fw_error("Out of memory\n");
 
         return err;
 }
@@ -2491,8 +2512,19 @@ static void pci_remove(struct pci_dev *dev)
 
         software_reset(ohci);
         free_irq(dev->irq, ohci);
+
+        if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom)
+                dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
+                                  ohci->next_config_rom, ohci->next_config_rom_bus);
+        if (ohci->config_rom)
+                dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
+                                  ohci->config_rom, ohci->config_rom_bus);
         dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE,
                           ohci->self_id_cpu, ohci->self_id_bus);
+        ar_context_release(&ohci->ar_request_ctx);
+        ar_context_release(&ohci->ar_response_ctx);
+        context_release(&ohci->at_request_ctx);
+        context_release(&ohci->at_response_ctx);
         kfree(ohci->it_context_list);
         kfree(ohci->ir_context_list);
         pci_iounmap(dev, ohci->registers);
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index ef0b9b419c27..d334cac5e1fc 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -173,6 +173,9 @@ struct sbp2_target {
         int blocked;    /* ditto */
 };
 
+/* Impossible login_id, to detect logout attempt before successful login */
+#define INVALID_LOGIN_ID 0x10000
+
 /*
  * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be
  * provided in the config rom. Most devices do provide a value, which
@@ -788,9 +791,20 @@ static void sbp2_release_target(struct kref *kref)
                         scsi_remove_device(sdev);
                         scsi_device_put(sdev);
                 }
-                sbp2_send_management_orb(lu, tgt->node_id, lu->generation,
-                                SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
-
+                if (lu->login_id != INVALID_LOGIN_ID) {
+                        int generation, node_id;
+                        /*
+                         * tgt->node_id may be obsolete here if we failed
+                         * during initial login or after a bus reset where
+                         * the topology changed.
+                         */
+                        generation = device->generation;
+                        smp_rmb(); /* node_id vs. generation */
+                        node_id    = device->node_id;
+                        sbp2_send_management_orb(lu, node_id, generation,
+                                                 SBP2_LOGOUT_REQUEST,
+                                                 lu->login_id, NULL);
+                }
                 fw_core_remove_address_handler(&lu->address_handler);
                 list_del(&lu->link);
                 kfree(lu);
@@ -805,19 +819,20 @@ static void sbp2_release_target(struct kref *kref)
 
 static struct workqueue_struct *sbp2_wq;
 
+static void sbp2_target_put(struct sbp2_target *tgt)
+{
+        kref_put(&tgt->kref, sbp2_release_target);
+}
+
 /*
  * Always get the target's kref when scheduling work on one its units.
  * Each workqueue job is responsible to call sbp2_target_put() upon return.
  */
 static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay)
 {
-        if (queue_delayed_work(sbp2_wq, &lu->work, delay))
-                kref_get(&lu->tgt->kref);
-}
-
-static void sbp2_target_put(struct sbp2_target *tgt)
-{
-        kref_put(&tgt->kref, sbp2_release_target);
+        kref_get(&lu->tgt->kref);
+        if (!queue_delayed_work(sbp2_wq, &lu->work, delay))
+                sbp2_target_put(lu->tgt);
 }
 
 /*
@@ -978,6 +993,7 @@ static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
 
         lu->tgt      = tgt;
         lu->lun      = lun_entry & 0xffff;
+        lu->login_id = INVALID_LOGIN_ID;
         lu->retries  = 0;
         lu->has_sdev = false;
         lu->blocked  = false;
@@ -1147,7 +1163,7 @@ static int sbp2_probe(struct device *dev)
 
         /* Do the login in a workqueue so we can easily reschedule retries. */
         list_for_each_entry(lu, &tgt->lu_list, link)
-                sbp2_queue_work(lu, 0);
+                sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
         return 0;
 
  fail_tgt_put:
diff --git a/drivers/firewire/fw-topology.c b/drivers/firewire/fw-topology.c
index c1b81077c4a8..5e204713002d 100644
--- a/drivers/firewire/fw-topology.c
+++ b/drivers/firewire/fw-topology.c
@@ -413,7 +413,7 @@ static void
 update_tree(struct fw_card *card, struct fw_node *root)
 {
         struct list_head list0, list1;
-        struct fw_node *node0, *node1;
+        struct fw_node *node0, *node1, *next1;
         int i, event;
 
         INIT_LIST_HEAD(&list0);
@@ -485,7 +485,9 @@ update_tree(struct fw_card *card, struct fw_node *root)
                 }
 
                 node0 = fw_node(node0->link.next);
-                node1 = fw_node(node1->link.next);
+                next1 = fw_node(node1->link.next);
+                fw_node_put(node1);
+                node1 = next1;
         }
 }
 
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index 027f58ce81ad..aed7dbb17cda 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -248,7 +248,7 @@ struct fw_card {
         struct fw_node *local_node;
         struct fw_node *root_node;
         struct fw_node *irm_node;
-        int color;
+        u8 color; /* must be u8 to match the definition in struct fw_node */
         int gap_count;
         bool beta_repeaters_present;