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| author | Sergei Miroshnichenko <sergeimir@emcraft.com> | 2016-09-07 16:51:12 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2016-09-22 10:01:21 +0200 |
| commit | 9abefcb1aaa58b9d5aa40a8bb12c87d02415e4c8 (patch) | |
| tree | ff081f6644b855d62aae2a48a8f6f4a8c00d7a78 /include | |
| parent | 7e32b44361abc77fbc01f2b97b045c405b2583e5 (diff) | |
| download | linux-0-day-9abefcb1aaa58b9d5aa40a8bb12c87d02415e4c8.tar.gz linux-0-day-9abefcb1aaa58b9d5aa40a8bb12c87d02415e4c8.tar.xz | |
can: dev: fix deadlock reported after bus-off
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>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/can/dev.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h index 5261751f6bd4d..5f5270941ba02 100644 --- a/include/linux/can/dev.h +++ b/include/linux/can/dev.h @@ -32,6 +32,7 @@ enum can_mode { * CAN common private data */ struct can_priv { + struct net_device *dev; struct can_device_stats can_stats; struct can_bittiming bittiming, data_bittiming; @@ -47,7 +48,7 @@ struct can_priv { u32 ctrlmode_static; /* static enabled options for driver/hardware */ int restart_ms; - struct timer_list restart_timer; + struct delayed_work restart_work; int (*do_set_bittiming)(struct net_device *dev); int (*do_set_data_bittiming)(struct net_device *dev); |