Rasmus Villemoes 4b17845529 dfu: define a callback function for the dfu_alt_info environment variable
I'm trying to use dfu-util for bootstrapping an stm32mp board. It
mostly works fine, but something goes horribly wrong as soon as I make
use of the ability to run arbitrary u-boot shell commands. The shell
commands themselves work fine, but the heuristic "dfu_alt_info may
have changed, we have to reinit" seems to cause the board and/or my
host machine to go into some bad state, and further dfu-util commands
fail.

U-Boot already has a mechanism whereby C code can be told about
changes to specific environment variables. So instead of always doing
re-init, add a hook to the dfu_alt_info variable so that we only do
set dfu_reinit_needed if the commands actually did modify that
variable.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20240911133900.1444083-1-rasmus.villemoes@prevas.dk
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
2024-10-01 10:55:09 +02:00
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