This patch series improves the reliability of EFI capsule updates by fixing issues in device path matching and partition name filtering.
The first patch updates the logic in find_handle() to correctly match device paths when the EFI System Partition (ESP) is a sub-partition within a larger boot device. Previously, the function only compared paths when the candidate path was shorter or equal in length to the input path. This caused failures when the ESP path was longer, as is common when the ESP resides inside a UFS LUN. The new logic allows matching when the input path is a prefix of the candidate path, ensuring the correct EFI handle is returned for accessing the ESP during capsule updates. The second patch fixes a bug in 'capsule_update.c' where the logic was incorrectly matching partitions like 'uefisecapps_a' when it intended to match only 'uefi_a' or 'uefi_b'. This prevents flashing to unintended partitions. Together, these changes improve the correctness and safety of the capsule update process on Snapdragon platforms. Balaji Selvanathan (2): efi_loader: improve device path matching for partition lookup capsule_update: fix partition match to exclude uefisecapps arch/arm/mach-snapdragon/capsule_update.c | 2 +- lib/efi_loader/efi_device_path.c | 62 ++++++++++++++++------- lib/efi_loader/efi_disk.c | 2 +- 3 files changed, 46 insertions(+), 20 deletions(-) -- 2.34.1
