tree f0590ad2ff0f405d65509df61956af8a13b60bdd
parent 5e077a77670d36975cc0dc885d2e9d9f67ab14c1
author Pavel Pisa <pisa@cmp.felk.cvut.cz> 1704323666 +0100
committer Philippe Mathieu-Daudé <philmd@linaro.org> 1704468015 +0100

hw/net/can/sja1000: fix bug for single acceptance filter and standard frame

A CAN sja1000 standard frame filter mask has been computed and applied
incorrectly for standard frames when single Acceptance Filter Mode
(MOD_AFM = 1) has been selected. The problem has not been found
by Linux kernel testing because it uses dual filter mode (MOD_AFM = 0)
and leaves falters fully open.

The problem has been noticed by Grant Ramsay when testing with Zephyr
RTOS which uses single filter mode.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Reported-by: Grant Ramsay <gramsay@enphaseenergy.com>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2028
Fixes: 733210e754 ("hw/net/can: SJA1000 chip register level emulation")
Message-ID: <20240103231426.5685-1-pisa@fel.cvut.cz>