diff options
| author | Tyler Baker <tyler.baker@linaro.org> | 2015-01-12 07:54:46 -0800 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2015-01-16 19:11:31 -0800 |
| commit | 41544f9f38f19cb46dc9a8fa37c58677a0300899 (patch) | |
| tree | f5be06dc5c2ea9223af0821e30060b649f360031 /drivers/reset | |
| parent | a30e93186c607684ed2d8283c95d30c7f1007aa3 (diff) | |
| download | linux-stable-41544f9f38f19cb46dc9a8fa37c58677a0300899.tar.gz linux-stable-41544f9f38f19cb46dc9a8fa37c58677a0300899.tar.bz2 linux-stable-41544f9f38f19cb46dc9a8fa37c58677a0300899.zip | |
reset: sunxi: fix spinlock initialization
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-optimus
Signed-off-by: Tyler Baker <tyler.baker@linaro.org>
Cc: <stable@vger.kernel.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers/reset')
| -rw-r--r-- | drivers/reset/reset-sunxi.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c index eebc52cb6984..3d95c87160b3 100644 --- a/drivers/reset/reset-sunxi.c +++ b/drivers/reset/reset-sunxi.c @@ -102,6 +102,8 @@ static int sunxi_reset_init(struct device_node *np) goto err_alloc; } + spin_lock_init(&data->lock); + data->rcdev.owner = THIS_MODULE; data->rcdev.nr_resets = size * 32; data->rcdev.ops = &sunxi_reset_ops; @@ -157,6 +159,8 @@ static int sunxi_reset_probe(struct platform_device *pdev) if (IS_ERR(data->membase)) return PTR_ERR(data->membase); + spin_lock_init(&data->lock); + data->rcdev.owner = THIS_MODULE; data->rcdev.nr_resets = resource_size(res) * 32; data->rcdev.ops = &sunxi_reset_ops; |