Sergei Miroshnichenko ebee2e2f30
can: dev: fix deadlock reported after bus-off ...
commit 9abefcb1aaa58b9d5aa40a8bb12c87d02415e4c8 upstream.
A timer was used to restart after the bus-off state, leading to a
relatively large can_restart() executed in an interrupt context,
which in turn sets up pinctrl. When this happens during system boot,
there is a high probability of grabbing the pinctrl_list_mutex,
which is locked already by the probe() of other device, making the
kernel suspect a deadlock condition [1].
To resolve this issue, the restart_timer is replaced by a delayed
work.
[1] https://github.com/victronenergy/venus/issues/24
Signed-off-by: Sergei Miroshnichenko <sergeimir@emcraft.com >
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de >
Signed-off-by: Willy Tarreau <w@1wt.eu >
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Sergei Miroshnichenko
ebee2e2f30