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| author |   Mike Waychison <mikew@google.com> | 2011-07-21 16:57:57 -0400 |
|---|---|---|
| committer |   Tony Luck <tony.luck@intel.com> | 2011-07-22 16:15:21 -0700 |
| commit | a2940908391f3cee72e38769b30e829b22742b5b (patch) | |
| tree | 30dc4ca2eae129f2612e74b60ff125b75af45eae /drivers/firmware | |
| parent | efi: Add support for using efivars as a pstore backend (diff) | |
| download | linux-dev-a2940908391f3cee72e38769b30e829b22742b5b.tar.xz linux-dev-a2940908391f3cee72e38769b30e829b22742b5b.zip | |
efivars: String functions
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>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efivars.c | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c index 2bbb22670d2d..4202a3170467 100644 --- a/drivers/firmware/efivars.c +++ b/drivers/firmware/efivars.c @@ -144,23 +144,29 @@ 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 @@ -518,7 +524,9 @@ static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part, efivar_unregister(found); if (size) - efivar_create_sysfs_entry(efivars, utf8_strsize(efi_name, DUMP_NAME_LEN * 2), + efivar_create_sysfs_entry(efivars, + utf16_strsize(efi_name, + DUMP_NAME_LEN * 2), efi_name, &vendor); return part; @@ -591,8 +599,8 @@ 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) && @@ -624,8 +632,8 @@ 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) { @@ -654,8 +662,8 @@ 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) && |