diff options
Diffstat (limited to 'lib/efi_loader/efi_device_path.c')
| -rw-r--r-- | lib/efi_loader/efi_device_path.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c index d5cc4958304..ea097839dbe 100644 --- a/lib/efi_loader/efi_device_path.c +++ b/lib/efi_loader/efi_device_path.c @@ -110,17 +110,13 @@ int efi_dp_match(const struct efi_device_path *a, /** * efi_dp_shorten() - shorten device-path * - * We can have device paths that start with a USB WWID or a USB Class node, - * and a few other cases which don't encode the full device path with bus - * hierarchy: + * When creating a short boot option we want to use a device-path that is + * independent of the location where the block device is plugged in. * - * * MESSAGING:USB_WWID - * * MESSAGING:USB_CLASS - * * MEDIA:FILE_PATH - * * MEDIA:HARD_DRIVE - * * MESSAGING:URI + * UsbWwi() nodes contain a serial number, hard drive paths a partition + * UUID. Both should be unique. * - * See UEFI spec (section 3.1.2, about short-form device-paths) + * See UEFI spec, section 3.1.2 for "short-form device path". * * @dp: original device-path * @Return: shortened device-path or NULL @@ -128,12 +124,7 @@ int efi_dp_match(const struct efi_device_path *a, struct efi_device_path *efi_dp_shorten(struct efi_device_path *dp) { while (dp) { - /* - * TODO: Add MESSAGING:USB_WWID and MESSAGING:URI.. - * in practice fallback.efi just uses MEDIA:HARD_DRIVE - * so not sure when we would see these other cases. - */ - if (EFI_DP_TYPE(dp, MESSAGING_DEVICE, MSG_USB) || + if (EFI_DP_TYPE(dp, MESSAGING_DEVICE, MSG_USB_WWI) || EFI_DP_TYPE(dp, MEDIA_DEVICE, HARD_DRIVE_PATH) || EFI_DP_TYPE(dp, MEDIA_DEVICE, FILE_PATH)) return dp; @@ -735,7 +726,7 @@ __maybe_unused static void *dp_fill(void *buf, struct udevice *dev) #endif #if defined(CONFIG_USB) case UCLASS_MASS_STORAGE: { - struct blk_desc *desc = desc = dev_get_uclass_plat(dev); + struct blk_desc *desc = dev_get_uclass_plat(dev); struct efi_device_path_controller *dp = dp_fill(buf, dev->parent); |