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[efi] Provide efi_devpath_len()

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-09-10 23:22:43 +01:00
parent 4a7d691697
commit 7107334391
6 changed files with 19 additions and 17 deletions
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5
src/drivers/usb/usbio.c
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@@ -1492,15 +1492,14 @@ static int usbio_path ( struct usbio_device *usbio ) {
path = u.interface;
/* Locate end of device path and sanity check */
end = efi_devpath_end ( path );
len = ( ( ( void * ) end ) - ( ( void * ) path ) );
len = efi_devpath_len ( path );
if ( len < sizeof ( *usbpath ) ) {
DBGC ( usbio, "USBIO %s underlength device path\n",
efi_handle_name ( handle ) );
rc = -EINVAL;
goto err_underlength;
}
usbpath = ( ( ( void * ) end ) - sizeof ( *usbpath ) );
usbpath = ( ( ( void * ) path ) + len - sizeof ( *usbpath ) );
if ( ! ( ( usbpath->Header.Type == MESSAGING_DEVICE_PATH ) &&
( usbpath->Header.SubType == MSG_USB_DP ) ) ) {
DBGC ( usbio, "USBIO %s not a USB device path: ",