Hi Fabio, hi Steffen,
On Friday, 11 July 2025, 14:05:16 CEST, Fabio Estevam wrote:
Hi Christian,
On Fri, Jul 11, 2025 at 9:01 AM Christian Eggers ceggers@arri.de wrote:
Since commit 55d4980ce55b ("nvmem: core: support specifying both: cell raw data & post read lengths"), the aligned length (e.g. '8' instead of '6') is passed to the read_post_process callback. This causes that the 2 bytes following the MAC address in the ocotp are swapped to the beginning of the address. As a result, an invalid MAC address is returned and to make it even worse, this address can be equal on boards with the same OUI vendor prefix.
Fixes: 55d4980ce55b ("nvmem: core: support specifying both: cell raw data & post read lengths") Signed-off-by: Christian Eggers ceggers@arri.de Cc: stable@vger.kernel.org
Tested on i.MX6ULL, but I assume that this is also required for. imx-ocotp-ele.c (i.MX93).
Steffen has recently sent a similar fix:
https://lore.kernel.org/linux-arm-kernel/20250708101206.70793-1-steffen@inno...
Does this work for you?
your patch does obviously the same as mine. So the answer is 'yes'
regards, Christian