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Subject[PATCH 3/4] hwspinlock: sprd: Use devm_add_action_or_reset() for calls to clk_disable_unprepare()
Date
Use devm_add_action_or_reset() for calls to clk_disable_unprepare(),
which can simplify the error handling.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
drivers/hwspinlock/sprd_hwspinlock.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/hwspinlock/sprd_hwspinlock.c b/drivers/hwspinlock/sprd_hwspinlock.c
index d210424..e76c702 100644
--- a/drivers/hwspinlock/sprd_hwspinlock.c
+++ b/drivers/hwspinlock/sprd_hwspinlock.c
@@ -79,6 +79,13 @@ static void sprd_hwspinlock_relax(struct hwspinlock *lock)
.relax = sprd_hwspinlock_relax,
};

+static void sprd_hwspinlock_disable(void *data)
+{
+ struct sprd_hwspinlock_dev *sprd_hwlock = data;
+
+ clk_disable_unprepare(sprd_hwlock->clk);
+}
+
static int sprd_hwspinlock_probe(struct platform_device *pdev)
{
struct sprd_hwspinlock_dev *sprd_hwlock;
@@ -109,6 +116,14 @@ static int sprd_hwspinlock_probe(struct platform_device *pdev)
if (ret)
return ret;

+ ret = devm_add_action_or_reset(&pdev->dev, sprd_hwspinlock_disable,
+ sprd_hwlock);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to add hwspinlock disable action\n");
+ return ret;
+ }
+
/* set the hwspinlock to record user id to identify subsystems */
writel(HWSPINLOCK_USER_BITS, sprd_hwlock->base + HWSPINLOCK_RECCTRL);

@@ -124,7 +139,6 @@ static int sprd_hwspinlock_probe(struct platform_device *pdev)
&sprd_hwspinlock_ops, 0, SPRD_HWLOCKS_NUM);
if (ret) {
pm_runtime_disable(&pdev->dev);
- clk_disable_unprepare(sprd_hwlock->clk);
return ret;
}

@@ -137,7 +151,6 @@ static int sprd_hwspinlock_remove(struct platform_device *pdev)

hwspin_lock_unregister(&sprd_hwlock->bank);
pm_runtime_disable(&pdev->dev);
- clk_disable_unprepare(sprd_hwlock->clk);
return 0;
}

--
1.7.9.5
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