diff options
| -rw-r--r-- | drivers/firmware/efivars.c | 80 |
1 files changed, 46 insertions, 34 deletions
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c index 34c8783a2aa8..eab4ec41c523 100644 --- a/drivers/firmware/efivars.c +++ b/drivers/firmware/efivars.c @@ -125,7 +125,6 @@ struct efi_variable { } __attribute__((packed)); struct efivar_entry { - struct efivars *efivars; struct efi_variable var; struct list_head list; struct kobject kobj; @@ -137,8 +136,8 @@ struct efivar_attribute { ssize_t (*store)(struct efivar_entry *entry, const char *buf, size_t count); }; -static struct efivars __efivars; -static struct efivar_operations ops; +/* Private pointer to registered efivars */ +static struct efivars *__efivars; #define PSTORE_EFI_ATTRIBUTES \ (EFI_VARIABLE_NON_VOLATILE | \ @@ -479,7 +478,7 @@ efivar_attr_read(struct efivar_entry *entry, char *buf) if (!entry || !buf) return -EINVAL; - status = get_var_data(entry->efivars, var); + status = get_var_data(__efivars, var); if (status != EFI_SUCCESS) return -EIO; @@ -513,7 +512,7 @@ efivar_size_read(struct efivar_entry *entry, char *buf) if (!entry || !buf) return -EINVAL; - status = get_var_data(entry->efivars, var); + status = get_var_data(__efivars, var); if (status != EFI_SUCCESS) return -EIO; @@ -530,7 +529,7 @@ efivar_data_read(struct efivar_entry *entry, char *buf) if (!entry || !buf) return -EINVAL; - status = get_var_data(entry->efivars, var); + status = get_var_data(__efivars, var); if (status != EFI_SUCCESS) return -EIO; @@ -545,7 +544,7 @@ static ssize_t efivar_store_raw(struct efivar_entry *entry, const char *buf, size_t count) { struct efi_variable *new_var, *var = &entry->var; - struct efivars *efivars = entry->efivars; + struct efivars *efivars = __efivars; efi_status_t status = EFI_NOT_FOUND; if (count != sizeof(struct efi_variable)) @@ -606,7 +605,7 @@ efivar_show_raw(struct efivar_entry *entry, char *buf) if (!entry || !buf) return 0; - status = get_var_data(entry->efivars, var); + status = get_var_data(__efivars, var); if (status != EFI_SUCCESS) return -EIO; @@ -728,7 +727,7 @@ static ssize_t efivarfs_file_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { struct efivar_entry *var = file->private_data; - struct efivars *efivars; + struct efivars *efivars = __efivars; efi_status_t status; void *data; u32 attributes; @@ -746,8 +745,6 @@ static ssize_t efivarfs_file_write(struct file *file, if (attributes & ~(EFI_VARIABLE_MASK)) return -EINVAL; - efivars = var->efivars; - /* * Ensure that the user can't allocate arbitrarily large * amounts of memory. Pick a default size of 64K if @@ -855,7 +852,7 @@ static ssize_t efivarfs_file_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct efivar_entry *var = file->private_data; - struct efivars *efivars = var->efivars; + struct efivars *efivars = __efivars; efi_status_t status; unsigned long datasize = 0; u32 attributes; @@ -1009,7 +1006,7 @@ static int efivarfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) { struct inode *inode; - struct efivars *efivars = &__efivars; + struct efivars *efivars = __efivars; struct efivar_entry *var; int namelen, i = 0, err = 0; @@ -1038,7 +1035,6 @@ static int efivarfs_create(struct inode *dir, struct dentry *dentry, var->var.VariableName[i] = '\0'; inode->i_private = var; - var->efivars = efivars; var->kobj.kset = efivars->kset; err = kobject_init_and_add(&var->kobj, &efivar_ktype, NULL, "%s", @@ -1063,7 +1059,7 @@ out: static int efivarfs_unlink(struct inode *dir, struct dentry *dentry) { struct efivar_entry *var = dentry->d_inode->i_private; - struct efivars *efivars = var->efivars; + struct efivars *efivars = __efivars; efi_status_t status; spin_lock_irq(&efivars->lock); @@ -1175,7 +1171,7 @@ static int efivarfs_fill_super(struct super_block *sb, void *data, int silent) struct inode *inode = NULL; struct dentry *root; struct efivar_entry *entry, *n; - struct efivars *efivars = &__efivars; + struct efivars *efivars = __efivars; char *name; int err = -ENOMEM; @@ -1302,7 +1298,7 @@ static const struct inode_operations efivarfs_dir_inode_operations = { static int efi_pstore_open(struct pstore_info *psi) { - struct efivars *efivars = psi->data; + struct efivars *efivars = __efivars; spin_lock_irq(&efivars->lock); efivars->walk_entry = list_first_entry(&efivars->list, @@ -1312,7 +1308,7 @@ static int efi_pstore_open(struct pstore_info *psi) static int efi_pstore_close(struct pstore_info *psi) { - struct efivars *efivars = psi->data; + struct efivars *efivars = __efivars; spin_unlock_irq(&efivars->lock); return 0; @@ -1323,7 +1319,7 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type, char **buf, struct pstore_info *psi) { efi_guid_t vendor = LINUX_EFI_CRASH_GUID; - struct efivars *efivars = psi->data; + struct efivars *efivars = __efivars; char name[DUMP_NAME_LEN]; int i; int cnt; @@ -1386,7 +1382,7 @@ static int efi_pstore_write(enum pstore_type_id type, char name[DUMP_NAME_LEN]; efi_char16_t efi_name[DUMP_NAME_LEN]; efi_guid_t vendor = LINUX_EFI_CRASH_GUID; - struct efivars *efivars = psi->data; + struct efivars *efivars = __efivars; int i, ret = 0; efi_status_t status = EFI_NOT_FOUND; unsigned long flags; @@ -1443,7 +1439,7 @@ static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count, char name_old[DUMP_NAME_LEN]; efi_char16_t efi_name_old[DUMP_NAME_LEN]; efi_guid_t vendor = LINUX_EFI_CRASH_GUID; - struct efivars *efivars = psi->data; + struct efivars *efivars = __efivars; struct efivar_entry *entry, *found = NULL; int i; @@ -1535,7 +1531,7 @@ static ssize_t efivar_create(struct file *filp, struct kobject *kobj, char *buf, loff_t pos, size_t count) { struct efi_variable *new_var = (struct efi_variable *)buf; - struct efivars *efivars = bin_attr->private; + struct efivars *efivars = __efivars; struct efivar_entry *search_efivar, *n; unsigned long strsize1, strsize2; efi_status_t status = EFI_NOT_FOUND; @@ -1612,7 +1608,7 @@ static ssize_t efivar_delete(struct file *filp, struct kobject *kobj, char *buf, loff_t pos, size_t count) { struct efi_variable *del_var = (struct efi_variable *)buf; - struct efivars *efivars = bin_attr->private; + struct efivars *efivars = __efivars; struct efivar_entry *search_efivar, *n; unsigned long strsize1, strsize2; efi_status_t status = EFI_NOT_FOUND; @@ -1670,7 +1666,7 @@ static ssize_t efivar_delete(struct file *filp, struct kobject *kobj, static bool variable_is_present(efi_char16_t *variable_name, efi_guid_t *vendor) { struct efivar_entry *entry, *n; - struct efivars *efivars = &__efivars; + struct efivars *efivars = __efivars; unsigned long strsize1, strsize2; bool found = false; @@ -1716,7 +1712,7 @@ static unsigned long var_name_strnsize(efi_char16_t *variable_name, static void efivar_update_sysfs_entries(struct work_struct *work) { - struct efivars *efivars = &__efivars; + struct efivars *efivars = __efivars; efi_guid_t vendor; efi_char16_t *variable_name; unsigned long variable_name_size = 1024; @@ -1843,7 +1839,6 @@ efivar_create_sysfs_entry(struct efivars *efivars, return 1; } - new_efivar->efivars = efivars; memcpy(new_efivar->var.VariableName, variable_name, variable_name_size); memcpy(&(new_efivar->var.VendorGuid), vendor_guid, sizeof(efi_guid_t)); @@ -1942,6 +1937,8 @@ void unregister_efivars(struct efivars *efivars) { struct efivar_entry *entry, *n; + __efivars = NULL; + list_for_each_entry_safe(entry, n, &efivars->list, list) { spin_lock_irq(&efivars->lock); list_del(&entry->list); @@ -1998,6 +1995,8 @@ int register_efivars(struct efivars *efivars, unsigned long variable_name_size = 1024; int error = 0; + __efivars = efivars; + variable_name = kzalloc(variable_name_size, GFP_KERNEL); if (!variable_name) { printk(KERN_ERR "efivars: Memory allocation failed.\n"); @@ -2085,6 +2084,24 @@ out: } EXPORT_SYMBOL_GPL(register_efivars); +static struct efivars generic_efivars; +static struct efivar_operations generic_ops; + +static int generic_ops_register(void) +{ + generic_ops.get_variable = efi.get_variable; + generic_ops.set_variable = efi.set_variable; + generic_ops.get_next_variable = efi.get_next_variable; + generic_ops.query_variable_info = efi.query_variable_info; + + return register_efivars(&generic_efivars, &generic_ops, efi_kobj); +} + +static void generic_ops_unregister(void) +{ + unregister_efivars(&generic_efivars); +} + /* * For now we register the efi subsystem with the firmware subsystem * and the vars subsystem with the efi subsystem. In the future, it @@ -2111,12 +2128,7 @@ efivars_init(void) return -ENOMEM; } - ops.get_variable = efi.get_variable; - ops.set_variable = efi.set_variable; - ops.get_next_variable = efi.get_next_variable; - ops.query_variable_info = efi.query_variable_info; - - error = register_efivars(&__efivars, &ops, efi_kobj); + error = generic_ops_register(); if (error) goto err_put; @@ -2132,7 +2144,7 @@ efivars_init(void) return 0; err_unregister: - unregister_efivars(&__efivars); + generic_ops_unregister(); err_put: kobject_put(efi_kobj); return error; @@ -2144,7 +2156,7 @@ efivars_exit(void) cancel_work_sync(&efivar_work); if (efi_enabled(EFI_RUNTIME_SERVICES)) { - unregister_efivars(&__efivars); + generic_ops_unregister(); kobject_put(efi_kobj); } } |