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efivars: Use string functions in pstore_write

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Instead of open-coding the string operations for comparing the prefix of
the variable names, use the provided utf16_* string functions.

This patch also changes the calls to efi.set_variable to
efivars->ops->set_variable so that the right function gets called in the
case of gsmi (which doesn't have a valid efi structure).

As well, make sure that we only consider variables with the right vendor
string.

Signed-off-by: Mike Waychison <mikew@google.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Mike Waychison 2011-07-21 16:57:59 -04:00 committed by Tony Luck
parent 828aa1f00e
commit c475594d83
1 changed files with 14 additions and 12 deletions
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26
drivers/firmware/efivars.c
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@ -512,18 +512,20 @@ static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
list_for_each_entry(entry, &efivars->list, list) {
get_var_data_locked(efivars, &entry->var);
for (i = 0; i < DUMP_NAME_LEN; i++) {
if (efi_name[i] == 0) {
found = entry;
efivars->ops->set_variable(entry->var.VariableName,
&entry->var.VendorGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
0, NULL);
break;
} else if (efi_name[i] != entry->var.VariableName[i]) {
break;
}
}
if (efi_guidcmp(entry->var.VendorGuid, vendor))
continue;
if (utf16_strncmp(entry->var.VariableName, efi_name,
utf16_strlen(efi_name)))
continue;
/* Needs to be a prefix */
if (entry->var.VariableName[utf16_strlen(efi_name)] == 0)
continue;
/* found */
found = entry;
efivars->ops->set_variable(entry->var.VariableName, &entry->var.VendorGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
0, NULL);
}
if (found)