Thanks :)

On Tuesday 08 August 2017 11:55 PM, Krzysztof Kozlowski wrote:
On Tue, Aug 08, 2017 at 05:20:55PM +0530, Arvind Yadav wrote:
clk_prepare_enable() can fail here and we must check its return value.
we must call pm_runtime_disable() and pm_runtime_set_suspended(),
If exynos_lpass_probe is not successful.

Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com>
This is not a trivial change so please mark all such patches as RFT.
Submit checklist mentions testing in multiple steps and last time your
ASoC changes were not tested.
I will ask for RFT.

---
  drivers/mfd/exynos-lpass.c | 23 ++++++++++++++++-------
  1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/mfd/exynos-lpass.c b/drivers/mfd/exynos-lpass.c
index ca829f8..c74ff62 100644
--- a/drivers/mfd/exynos-lpass.c
+++ b/drivers/mfd/exynos-lpass.c
@@ -73,9 +73,13 @@ static void exynos_lpass_core_sw_reset(struct exynos_lpass 
*lpass, int mask)
        regmap_write(lpass->top, SFR_LPASS_CORE_SW_RESET, val);
  }
-static void exynos_lpass_enable(struct exynos_lpass *lpass)
+static int exynos_lpass_enable(struct exynos_lpass *lpass)
  {
-       clk_prepare_enable(lpass->sfr0_clk);
+       int ret;
+
+       ret = clk_prepare_enable(lpass->sfr0_clk);
+       if (ret)
+               return ret;
/* Unmask SFR, DMA and I2S interrupt */
        regmap_write(lpass->top, SFR_LPASS_INTR_CA5_MASK,
@@ -87,6 +91,8 @@ static void exynos_lpass_enable(struct exynos_lpass *lpass)
        exynos_lpass_core_sw_reset(lpass, LPASS_I2S_SW_RESET);
        exynos_lpass_core_sw_reset(lpass, LPASS_DMA_SW_RESET);
        exynos_lpass_core_sw_reset(lpass, LPASS_MEM_SW_RESET);
+
+       return 0;
  }
static void exynos_lpass_disable(struct exynos_lpass *lpass)
@@ -112,6 +118,7 @@ static int exynos_lpass_probe(struct platform_device *pdev)
        struct exynos_lpass *lpass;
        void __iomem *base_top;
        struct resource *res;
+       int ret;
lpass = devm_kzalloc(dev, sizeof(*lpass), GFP_KERNEL);
        if (!lpass)
@@ -136,8 +143,12 @@ static int exynos_lpass_probe(struct platform_device *pdev)
        platform_set_drvdata(pdev, lpass);
        pm_runtime_set_active(dev);
        pm_runtime_enable(dev);
-       exynos_lpass_enable(lpass);
-
+       ret = exynos_lpass_enable(lpass);
+       if (ret) {
+               pm_runtime_disable(dev);
+               pm_runtime_set_suspended(dev);
You need also regmap_exit().

+               return ret;
+       }
Leave one blank line before return.

Best regards,
Krzysztof

~arvind

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