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efivars: String functions

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commit a294090839 upstream.

Fix the string functions in the efivars driver to be called utf16_*
instead of utf8_* as the encoding is utf16, not utf8.

As well, rename utf16_strlen to utf16_strnlen as it takes a maxlength
argument and the name should be consistent with the standard C function
names.  utf16_strlen is still provided for convenience in a subsequent
patch.

Signed-off-by: Mike Waychison <mikew@google.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mike Waychison
2011-07-21 16:57:57 -04:00
committed by Greg Kroah-Hartman
parent 34dea1cae3
commit 9f0c771dfa
1 changed files with 16 additions and 10 deletions
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26
drivers/firmware/efivars.c
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@@ -141,23 +141,29 @@ efivar_create_sysfs_entry(struct efivars *efivars,
/* Return the number of unicode characters in data */
static unsigned long
utf8_strlen(efi_char16_t *data, unsigned long maxlength)
utf16_strnlen(efi_char16_t *s, size_t maxlength)
{
unsigned long length = 0;
while (*data++ != 0 && length < maxlength)
while (*s++ != 0 && length < maxlength)
length++;
return length;
}
static unsigned long
utf16_strlen(efi_char16_t *s)
{
return utf16_strnlen(s, ~0UL);
}
/*
* Return the number of bytes is the length of this string
* Note: this is NOT the same as the number of unicode characters
*/
static inline unsigned long
utf8_strsize(efi_char16_t *data, unsigned long maxlength)
utf16_strsize(efi_char16_t *data, unsigned long maxlength)
{
return utf8_strlen(data, maxlength/sizeof(efi_char16_t)) * sizeof(efi_char16_t);
return utf16_strnlen(data, maxlength/sizeof(efi_char16_t)) * sizeof(efi_char16_t);
}
static efi_status_t
@@ -414,8 +420,8 @@ static ssize_t efivar_create(struct file *filp, struct kobject *kobj,
* Does this variable already exist?
*/
list_for_each_entry_safe(search_efivar, n, &efivars->list, list) {
strsize1 = utf8_strsize(search_efivar->var.VariableName, 1024);
strsize2 = utf8_strsize(new_var->VariableName, 1024);
strsize1 = utf16_strsize(search_efivar->var.VariableName, 1024);
strsize2 = utf16_strsize(new_var->VariableName, 1024);
if (strsize1 == strsize2 &&
!memcmp(&(search_efivar->var.VariableName),
new_var->VariableName, strsize1) &&
@@ -447,8 +453,8 @@ static ssize_t efivar_create(struct file *filp, struct kobject *kobj,
/* Create the entry in sysfs. Locking is not required here */
status = efivar_create_sysfs_entry(efivars,
utf8_strsize(new_var->VariableName,
1024),
utf16_strsize(new_var->VariableName,
1024),
new_var->VariableName,
&new_var->VendorGuid);
if (status) {
@@ -477,8 +483,8 @@ static ssize_t efivar_delete(struct file *filp, struct kobject *kobj,
* Does this variable already exist?
*/
list_for_each_entry_safe(search_efivar, n, &efivars->list, list) {
strsize1 = utf8_strsize(search_efivar->var.VariableName, 1024);
strsize2 = utf8_strsize(del_var->VariableName, 1024);
strsize1 = utf16_strsize(search_efivar->var.VariableName, 1024);
strsize2 = utf16_strsize(del_var->VariableName, 1024);
if (strsize1 == strsize2 &&
!memcmp(&(search_efivar->var.VariableName),
del_var->VariableName, strsize1) &&