From 22cdb3f0f174e926071975cdc5157aa6526b67a7 Mon Sep 17 00:00:00 2001 From: Joshua Watt Date: Fri, 23 Jun 2023 17:05:48 -0500 Subject: android_ab: Add option to skip decrementing tries It is is sometimes desired to be able to skip decrementing the number of tries remaining in an Android A/B boot, and instead just check which slot will be tried later. This can commonly be be the case for platforms that want to A/B u-boot itself, but are required to boot from a FAT MBR partition. In these cases, u-boot must do an early check that the MBR points to the correct A/B boot partition, and if not rewrite the MBR to point to the correct one and reboot. Decrementing the try count in this case is not desired because it means that each u-boot might constantly ping-pong overwriting the MBR and rebooting until all the retries are used up. Signed-off-by: Joshua Watt --- boot/android_ab.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'boot') diff --git a/boot/android_ab.c b/boot/android_ab.c index 2d7b392666..60ae002978 100644 --- a/boot/android_ab.c +++ b/boot/android_ab.c @@ -181,7 +181,8 @@ static int ab_compare_slots(const struct slot_metadata *a, return 0; } -int ab_select_slot(struct blk_desc *dev_desc, struct disk_partition *part_info) +int ab_select_slot(struct blk_desc *dev_desc, struct disk_partition *part_info, + bool dec_tries) { struct bootloader_control *abc = NULL; u32 crc32_le; @@ -272,8 +273,10 @@ int ab_select_slot(struct blk_desc *dev_desc, struct disk_partition *part_info) log_err("ANDROID: Attempting slot %c, tries remaining %d\n", BOOT_SLOT_NAME(slot), abc->slot_info[slot].tries_remaining); - abc->slot_info[slot].tries_remaining--; - store_needed = true; + if (dec_tries) { + abc->slot_info[slot].tries_remaining--; + store_needed = true; + } } if (slot >= 0) { -- cgit v1.2.3