Commit e3c75d41 authored by Tyler Baker's avatar Tyler Baker Committed by Luis Henriques

reset: sunxi: fix spinlock initialization

commit 41544f9f upstream.

Call spin_lock_init() before the spinlocks are used, both in early init
and probe functions preventing a lockdep splat.

I have been observing lockdep complaining [1] during boot on my a80 optimus [2]
when CONFIG_PROVE_LOCKING has been enabled. This patch resolves the splat,
and has been tested on a few other sunxi platforms without issue.

[1] http://storage.kernelci.org/next/next-20150107/arm-multi_v7_defconfig+CONFIG_PROVE_LOCKING=y/lab-tbaker/boot-sun9i-a80-optimus.html
[2] http://kernelci.org/boot/?a80-optimusSigned-off-by: default avatarTyler Baker <tyler.baker@linaro.org>
Acked-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: default avatarKevin Hilman <khilman@linaro.org>
Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent 7e232c4a
...@@ -102,6 +102,8 @@ static int sunxi_reset_init(struct device_node *np) ...@@ -102,6 +102,8 @@ static int sunxi_reset_init(struct device_node *np)
goto err_alloc; goto err_alloc;
} }
spin_lock_init(&data->lock);
data->rcdev.owner = THIS_MODULE; data->rcdev.owner = THIS_MODULE;
data->rcdev.nr_resets = size * 32; data->rcdev.nr_resets = size * 32;
data->rcdev.ops = &sunxi_reset_ops; data->rcdev.ops = &sunxi_reset_ops;
...@@ -157,6 +159,8 @@ static int sunxi_reset_probe(struct platform_device *pdev) ...@@ -157,6 +159,8 @@ static int sunxi_reset_probe(struct platform_device *pdev)
if (IS_ERR(data->membase)) if (IS_ERR(data->membase))
return PTR_ERR(data->membase); return PTR_ERR(data->membase);
spin_lock_init(&data->lock);
data->rcdev.owner = THIS_MODULE; data->rcdev.owner = THIS_MODULE;
data->rcdev.nr_resets = resource_size(res) * 32; data->rcdev.nr_resets = resource_size(res) * 32;
data->rcdev.ops = &sunxi_reset_ops; data->rcdev.ops = &sunxi_reset_ops;
......
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