Merge commit 'v2.6.28-rc2' into x86/pci-ioapic-boot-irq-quirks

6 files changed, 78 insertions, 75 deletions

diff --git a/drivers/firmware/dcdbas.c b/drivers/firmware/dcdbas.c
index 25918f7dfd0f..50a071f1c945 100644
--- a/drivers/firmware/dcdbas.c
+++ b/drivers/firmware/dcdbas.c
@@ -152,20 +152,11 @@ static ssize_t smi_data_read(struct kobject *kobj,
                              struct bin_attribute *bin_attr,
                              char *buf, loff_t pos, size_t count)
 {
-        size_t max_read;
         ssize_t ret;
 
         mutex_lock(&smi_data_lock);
-
-        if (pos >= smi_data_buf_size) {
-                ret = 0;
-                goto out;
-        }
-
-        max_read = smi_data_buf_size - pos;
-        ret = min(max_read, count);
-        memcpy(buf, smi_data_buf + pos, ret);
-out:
+        ret = memory_read_from_buffer(buf, count, &pos, smi_data_buf,
+                                        smi_data_buf_size);
         mutex_unlock(&smi_data_lock);
         return ret;
 }
diff --git a/drivers/firmware/dell_rbu.c b/drivers/firmware/dell_rbu.c
index 7430e218cda6..13946ebd77d6 100644
--- a/drivers/firmware/dell_rbu.c
+++ b/drivers/firmware/dell_rbu.c
@@ -507,11 +507,6 @@ static ssize_t read_packet_data(char *buffer, loff_t pos, size_t count)
 
 static ssize_t read_rbu_mono_data(char *buffer, loff_t pos, size_t count)
 {
-        unsigned char *ptemp = NULL;
-        size_t bytes_left = 0;
-        size_t data_length = 0;
-        ssize_t ret_count = 0;
-
         /* check to see if we have something to return */
         if ((rbu_data.image_update_buffer == NULL) ||
                 (rbu_data.bios_image_size == 0)) {
@@ -519,28 +514,11 @@ static ssize_t read_rbu_mono_data(char *buffer, loff_t pos, size_t count)
                         "bios_image_size %lu\n",
                         rbu_data.image_update_buffer,
                         rbu_data.bios_image_size);
-                ret_count = -ENOMEM;
-                goto read_rbu_data_exit;
-        }
-
-        if (pos > rbu_data.bios_image_size) {
-                ret_count = 0;
-                goto read_rbu_data_exit;
+                return -ENOMEM;
         }
 
-        bytes_left = rbu_data.bios_image_size - pos;
-        data_length = min(bytes_left, count);
-
-        ptemp = rbu_data.image_update_buffer;
-        memcpy(buffer, (ptemp + pos), data_length);
-
-        if ((pos + count) > rbu_data.bios_image_size)
-                /* this was the last copy */
-                ret_count = bytes_left;
-        else
-                ret_count = count;
-      read_rbu_data_exit:
-        return ret_count;
+        return memory_read_from_buffer(buffer, count, &pos,
+                        rbu_data.image_update_buffer, rbu_data.bios_image_size);
 }
 
 static ssize_t read_rbu_data(struct kobject *kobj,
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index 455575be3560..3e526b6d00cb 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -15,6 +15,11 @@
  */
 static char dmi_empty_string[] = "        ";
 
+/*
+ * Catch too early calls to dmi_check_system():
+ */
+static int dmi_initialized;
+
 static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)
 {
         const u8 *bp = ((u8 *) dm) + dm->length;
@@ -366,7 +371,7 @@ void __init dmi_scan_machine(void)
 
         if (efi_enabled) {
                 if (efi.smbios == EFI_INVALID_TABLE_ADDR)
-                        goto out;
+                        goto error;
 
                 /* This is called as a core_initcall() because it isn't
                  * needed during early boot.  This also means we can
@@ -374,13 +379,13 @@ void __init dmi_scan_machine(void)
                  */
                 p = dmi_ioremap(efi.smbios, 32);
                 if (p == NULL)
-                        goto out;
+                        goto error;
 
                 rc = dmi_present(p + 0x10); /* offset of _DMI_ string */
                 dmi_iounmap(p, 32);
                 if (!rc) {
                         dmi_available = 1;
-                        return;
+                        goto out;
                 }
         }
         else {
@@ -391,19 +396,22 @@ void __init dmi_scan_machine(void)
                  */
                 p = dmi_ioremap(0xF0000, 0x10000);
                 if (p == NULL)
-                        goto out;
+                        goto error;
 
                 for (q = p; q < p + 0x10000; q += 16) {
                         rc = dmi_present(q);
                         if (!rc) {
                                 dmi_available = 1;
                                 dmi_iounmap(p, 0x10000);
-                                return;
+                                goto out;
                         }
                 }
                 dmi_iounmap(p, 0x10000);
         }
- out:   printk(KERN_INFO "DMI not present or invalid.\n");
+ error:
+        printk(KERN_INFO "DMI not present or invalid.\n");
+ out:
+        dmi_initialized = 1;
 }
 
 /**
@@ -424,6 +432,8 @@ int dmi_check_system(const struct dmi_system_id *list)
         int i, count = 0;
         const struct dmi_system_id *d = list;
 
+        WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n");
+
         while (d->ident) {
                 for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
                         int s = d->matches[i].slot;
diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
index 8024e3bfd877..4353414a0b77 100644
--- a/drivers/firmware/iscsi_ibft.c
+++ b/drivers/firmware/iscsi_ibft.c
@@ -334,9 +334,9 @@ static void ibft_release(struct kobject *kobj)
 /*
  *  Routines for parsing the iBFT data to be human readable.
  */
-ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
-                                  struct ibft_attribute *attr,
-                                  char *buf)
+static ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
+                                        struct ibft_attribute *attr,
+                                        char *buf)
 {
         struct ibft_initiator *initiator = entry->initiator;
         void *ibft_loc = entry->header;
@@ -376,9 +376,9 @@ ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
         return str - buf;
 }
 
-ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
-                            struct ibft_attribute *attr,
-                            char *buf)
+static ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
+                                  struct ibft_attribute *attr,
+                                  char *buf)
 {
         struct ibft_nic *nic = entry->nic;
         void *ibft_loc = entry->header;
@@ -440,9 +440,9 @@ ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
         return str - buf;
 };
 
-ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
-                               struct ibft_attribute *attr,
-                               char *buf)
+static ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
+                                     struct ibft_attribute *attr,
+                                     char *buf)
 {
         struct ibft_tgt *tgt = entry->tgt;
         void *ibft_loc = entry->header;
@@ -669,8 +669,7 @@ static int __init ibft_register_kobjects(struct ibft_table_header *header,
 
         control = (void *)header + sizeof(*header);
         end = (void *)control + control->hdr.length;
-        eot_offset = (void *)header + header->length -
-                     (void *)control - sizeof(*header);
+        eot_offset = (void *)header + header->length - (void *)control;
         rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control,
                              sizeof(*control));
 
@@ -733,7 +732,6 @@ static int __init ibft_create_attribute(struct ibft_kobject *kobj_data,
 
         attr->attr.name = name;
         attr->attr.mode = S_IRUSR;
-        attr->attr.owner = THIS_MODULE;
 
         attr->hdr = hdr;
         attr->show = show;
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
index 11f17440fea6..d53fbbfefa3e 100644
--- a/drivers/firmware/iscsi_ibft_find.c
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -81,4 +81,3 @@ void __init reserve_ibft_region(void)
         if (ibft_addr)
                 reserve_bootmem(pos, PAGE_ALIGN(len), BOOTMEM_DEFAULT);
 }
-EXPORT_SYMBOL_GPL(reserve_ibft_region);
diff --git a/drivers/firmware/memmap.c b/drivers/firmware/memmap.c
index e23399c7f773..3bf8ee120d42 100644
--- a/drivers/firmware/memmap.c
+++ b/drivers/firmware/memmap.c
@@ -84,20 +84,23 @@ static struct kobj_type memmap_ktype = {
  */
 
 /*
- * Firmware memory map entries
+ * Firmware memory map entries. No locking is needed because the
+ * firmware_map_add() and firmware_map_add_early() functions are called
+ * in firmware initialisation code in one single thread of execution.
  */
 static LIST_HEAD(map_entries);
 
 /**
- * Common implementation of firmware_map_add() and firmware_map_add_early()
- * which expects a pre-allocated struct firmware_map_entry.
- *
+ * firmware_map_add_entry() - Does the real work to add a firmware memmap entry.
  * @start: Start of the memory range.
  * @end:   End of the memory range (inclusive).
  * @type:  Type of the memory range.
  * @entry: Pre-allocated (either kmalloc() or bootmem allocator), uninitialised
  *         entry.
- */
+ *
+ * Common implementation of firmware_map_add() and firmware_map_add_early()
+ * which expects a pre-allocated struct firmware_map_entry.
+ **/
 static int firmware_map_add_entry(resource_size_t start, resource_size_t end,
                                   const char *type,
                                   struct firmware_map_entry *entry)
@@ -115,33 +118,52 @@ static int firmware_map_add_entry(resource_size_t start, resource_size_t end,
         return 0;
 }
 
-/*
- * See <linux/firmware-map.h> for documentation.
- */
+/**
+ * firmware_map_add() - Adds a firmware mapping entry.
+ * @start: Start of the memory range.
+ * @end:   End of the memory range (inclusive).
+ * @type:  Type of the memory range.
+ *
+ * This function uses kmalloc() for memory
+ * allocation. Use firmware_map_add_early() if you want to use the bootmem
+ * allocator.
+ *
+ * That function must be called before late_initcall.
+ *
+ * Returns 0 on success, or -ENOMEM if no memory could be allocated.
+ **/
 int firmware_map_add(resource_size_t start, resource_size_t end,
                      const char *type)
 {
         struct firmware_map_entry *entry;
 
         entry = kmalloc(sizeof(struct firmware_map_entry), GFP_ATOMIC);
-        WARN_ON(!entry);
         if (!entry)
                 return -ENOMEM;
 
         return firmware_map_add_entry(start, end, type, entry);
 }
 
-/*
- * See <linux/firmware-map.h> for documentation.
- */
+/**
+ * firmware_map_add_early() - Adds a firmware mapping entry.
+ * @start: Start of the memory range.
+ * @end:   End of the memory range (inclusive).
+ * @type:  Type of the memory range.
+ *
+ * Adds a firmware mapping entry. This function uses the bootmem allocator
+ * for memory allocation. Use firmware_map_add() if you want to use kmalloc().
+ *
+ * That function must be called before late_initcall.
+ *
+ * Returns 0 on success, or -ENOMEM if no memory could be allocated.
+ **/
 int __init firmware_map_add_early(resource_size_t start, resource_size_t end,
                                   const char *type)
 {
         struct firmware_map_entry *entry;
 
         entry = alloc_bootmem_low(sizeof(struct firmware_map_entry));
-        WARN_ON(!entry);
-        if (!entry)
+        if (WARN_ON(!entry))
                 return -ENOMEM;
 
         return firmware_map_add_entry(start, end, type, entry);
@@ -153,12 +175,14 @@ int __init firmware_map_add_early(resource_size_t start, resource_size_t end,
 
 static ssize_t start_show(struct firmware_map_entry *entry, char *buf)
 {
-        return snprintf(buf, PAGE_SIZE, "0x%llx\n", entry->start);
+        return snprintf(buf, PAGE_SIZE, "0x%llx\n",
+                (unsigned long long)entry->start);
 }
 
 static ssize_t end_show(struct firmware_map_entry *entry, char *buf)
 {
-        return snprintf(buf, PAGE_SIZE, "0x%llx\n", entry->end);
+        return snprintf(buf, PAGE_SIZE, "0x%llx\n",
+                (unsigned long long)entry->end);
 }
 
 static ssize_t type_show(struct firmware_map_entry *entry, char *buf)
@@ -181,7 +205,10 @@ static ssize_t memmap_attr_show(struct kobject *kobj,
 /*
  * Initialises stuff and adds the entries in the map_entries list to
  * sysfs. Important is that firmware_map_add() and firmware_map_add_early()
- * must be called before late_initcall.
+ * must be called before late_initcall. That's just because that function
+ * is called as late_initcall() function, which means that if you call
+ * firmware_map_add() or firmware_map_add_early() afterwards, the entries
+ * are not added to sysfs.
  */
 static int __init memmap_init(void)
 {
@@ -190,13 +217,13 @@ static int __init memmap_init(void)
         struct kset *memmap_kset;
 
         memmap_kset = kset_create_and_add("memmap", NULL, firmware_kobj);
-        WARN_ON(!memmap_kset);
-        if (!memmap_kset)
+        if (WARN_ON(!memmap_kset))
                 return -ENOMEM;
 
         list_for_each_entry(entry, &map_entries, list) {
                 entry->kobj.kset = memmap_kset;
-                kobject_add(&entry->kobj, NULL, "%d", i++);
+                if (kobject_add(&entry->kobj, NULL, "%d", i++))
+                        kobject_put(&entry->kobj);
         }
 
         return 0;