[PATCH] disk: part_dos: update partition table entries after write

Gary Bisson gary.bisson at boundarydevices.com
Thu Jan 28 09:01:06 CET 2021

Hi Heinrich,

On Wed, Jan 27, 2021 at 09:56:13PM +0100, Heinrich Schuchardt wrote:
> On 1/27/21 9:19 PM, Gary Bisson wrote:
> > Fixes issues when switching from GPT to MBR partition tables.
> This does not catch all cases of changing the MBR. See function
> write_mbr_partitions() with writes both the MBR and EBRs (if applicable).

Good catch! That's correct, I missed it for 2 reasons:
1- I focused on the fastboot code which indeed only calls
2- I did that work on 2020.10 U-Boot which didn't include

> Android devices typically have more than 4 partitions. Why does fastboot
> not update the extended boot records?

Fastboot is not only used for Android, we generally use it to flash our
Linux images as well. I guess the code just hasn't been updated to
handle EBR although I'd say that most people use GPT, especially Android

Anyway, I'll submit a v2 that take care of write_mbr_partitions().


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