power: reset: nvmem-reboot-mode: respect cell size for nvmem_cell_write

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[ Upstream commit 36b0562922 ]

Some platforms expose reboot mode cells that are smaller than an
unsigned int, in which cases lead to write failures. Read the cell
first to determine actual size and only write the number of bytes the
cell can hold.

Fixes: 7a78a7f769 ("power: reset: nvmem-reboot-mode: use NVMEM as reboot mode write interface")
Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
Link: https://patch.msgid.link/20251214191529.2470580-1-akoskovich@pm.me
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Alexander Koskovich 2025-12-14 19:16:18 +00:00 • committed by Sasha Levin

parent 82d3eb97a9

commit e9667db8b1

1 changed files with 13 additions and 2 deletions

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drivers/power/reset/nvmem-reboot-mode.c

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