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Subject[PATCH 2/4] hwspinlock: sprd: Check the return value of clk_prepare_enable()
Date
We must check the return value of clk_prepare_enable() to make sure the
hardware spinlock controller can be enabled successfully, otherwise we
should return error.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
drivers/hwspinlock/sprd_hwspinlock.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/hwspinlock/sprd_hwspinlock.c b/drivers/hwspinlock/sprd_hwspinlock.c
index 7a8534f..d210424 100644
--- a/drivers/hwspinlock/sprd_hwspinlock.c
+++ b/drivers/hwspinlock/sprd_hwspinlock.c
@@ -105,7 +105,9 @@ static int sprd_hwspinlock_probe(struct platform_device *pdev)
return PTR_ERR(sprd_hwlock->clk);
}

- clk_prepare_enable(sprd_hwlock->clk);
+ ret = clk_prepare_enable(sprd_hwlock->clk);
+ if (ret)
+ return ret;

/* set the hwspinlock to record user id to identify subsystems */
writel(HWSPINLOCK_USER_BITS, sprd_hwlock->base + HWSPINLOCK_RECCTRL);
--
1.7.9.5
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