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Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/efivars.c49
1 files changed, 31 insertions, 18 deletions
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index 528ce47c136..5633018c34a 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -103,8 +103,6 @@ struct efivars {
struct kset *kset;
struct bin_attribute *new_var, *del_var;
};
-static struct efivars __efivars;
-static struct efivars *efivars = &__efivars;
/*
* The maximum size of VariableName + Data = 1024
@@ -124,6 +122,7 @@ struct efi_variable {
struct efivar_entry {
+ struct efivars *efivars;
struct efi_variable var;
struct list_head list;
struct kobject kobj;
@@ -150,9 +149,10 @@ struct efivar_attribute efivar_attr_##_name = { \
* Prototype for sysfs creation function
*/
static int
-efivar_create_sysfs_entry(unsigned long variable_name_size,
- efi_char16_t *variable_name,
- efi_guid_t *vendor_guid);
+efivar_create_sysfs_entry(struct efivars *efivars,
+ unsigned long variable_name_size,
+ efi_char16_t *variable_name,
+ efi_guid_t *vendor_guid);
/* Return the number of unicode characters in data */
static unsigned long
@@ -176,7 +176,7 @@ utf8_strsize(efi_char16_t *data, unsigned long maxlength)
}
static efi_status_t
-get_var_data(struct efi_variable *var)
+get_var_data(struct efivars *efivars, struct efi_variable *var)
{
efi_status_t status;
@@ -221,7 +221,7 @@ efivar_attr_read(struct efivar_entry *entry, char *buf)
if (!entry || !buf)
return -EINVAL;
- status = get_var_data(var);
+ status = get_var_data(entry->efivars, var);
if (status != EFI_SUCCESS)
return -EIO;
@@ -244,7 +244,7 @@ efivar_size_read(struct efivar_entry *entry, char *buf)
if (!entry || !buf)
return -EINVAL;
- status = get_var_data(var);
+ status = get_var_data(entry->efivars, var);
if (status != EFI_SUCCESS)
return -EIO;
@@ -261,7 +261,7 @@ efivar_data_read(struct efivar_entry *entry, char *buf)
if (!entry || !buf)
return -EINVAL;
- status = get_var_data(var);
+ status = get_var_data(entry->efivars, var);
if (status != EFI_SUCCESS)
return -EIO;
@@ -276,6 +276,7 @@ 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;
efi_status_t status = EFI_NOT_FOUND;
if (count != sizeof(struct efi_variable))
@@ -325,7 +326,7 @@ efivar_show_raw(struct efivar_entry *entry, char *buf)
if (!entry || !buf)
return 0;
- status = get_var_data(var);
+ status = get_var_data(entry->efivars, var);
if (status != EFI_SUCCESS)
return -EIO;
@@ -413,6 +414,7 @@ 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 efivar_entry *search_efivar, *n;
unsigned long strsize1, strsize2;
efi_status_t status = EFI_NOT_FOUND;
@@ -459,8 +461,11 @@ static ssize_t efivar_create(struct file *filp, struct kobject *kobj,
spin_unlock(&efivars->lock);
/* Create the entry in sysfs. Locking is not required here */
- status = efivar_create_sysfs_entry(utf8_strsize(new_var->VariableName,
- 1024), new_var->VariableName, &new_var->VendorGuid);
+ status = efivar_create_sysfs_entry(efivars,
+ utf8_strsize(new_var->VariableName,
+ 1024),
+ new_var->VariableName,
+ &new_var->VendorGuid);
if (status) {
printk(KERN_WARNING "efivars: variable created, but sysfs entry wasn't.\n");
}
@@ -472,6 +477,7 @@ 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 efivar_entry *search_efivar, *n;
unsigned long strsize1, strsize2;
efi_status_t status = EFI_NOT_FOUND;
@@ -580,9 +586,10 @@ static struct kobject *efi_kobj;
* Returns 1 on failure, 0 on success
*/
static int
-efivar_create_sysfs_entry(unsigned long variable_name_size,
- efi_char16_t *variable_name,
- efi_guid_t *vendor_guid)
+efivar_create_sysfs_entry(struct efivars *efivars,
+ unsigned long variable_name_size,
+ efi_char16_t *variable_name,
+ efi_guid_t *vendor_guid)
{
int i, short_name_size = variable_name_size / sizeof(efi_char16_t) + 38;
char *short_name;
@@ -597,6 +604,7 @@ efivar_create_sysfs_entry(unsigned long variable_name_size,
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));
@@ -691,6 +699,8 @@ out_free:
return error;
}
+static struct efivars __efivars;
+
/*
* For now we register the efi subsystem with the firmware subsystem
* and the vars subsystem with the efi subsystem. In the future, it
@@ -706,6 +716,7 @@ efivars_init(void)
efi_guid_t vendor_guid;
efi_char16_t *variable_name;
unsigned long variable_name_size = 1024;
+ struct efivars *efivars = &__efivars;
int error = 0;
if (!efi_enabled)
@@ -751,9 +762,10 @@ efivars_init(void)
&vendor_guid);
switch (status) {
case EFI_SUCCESS:
- efivar_create_sysfs_entry(variable_name_size,
- variable_name,
- &vendor_guid);
+ efivar_create_sysfs_entry(efivars,
+ variable_name_size,
+ variable_name,
+ &vendor_guid);
break;
case EFI_NOT_FOUND:
break;
@@ -788,6 +800,7 @@ out_free:
static void __exit
efivars_exit(void)
{
+ struct efivars *efivars = &__efivars;
struct efivar_entry *entry, *n;
list_for_each_entry_safe(entry, n, &efivars->list, list) {