[PATCH] mmc: mxcmmc: Handle return value of clk_prepare_enable

[Arvind Yadav]

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com>
---
 drivers/mmc/host/mxcmmc.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index fb3ca82..c016820 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -1098,8 +1098,13 @@ static int mxcmci_probe(struct platform_device *pdev)
                goto out_free;
        }
 
-       clk_prepare_enable(host->clk_per);
-       clk_prepare_enable(host->clk_ipg);
+       ret = clk_prepare_enable(host->clk_per);
+       if (ret)
+               goto out_free;
+
+       ret = clk_prepare_enable(host->clk_ipg);
+       if (ret)
+               goto out_clk_per_put;
 
        mxcmci_softreset(host);
 
@@ -1168,8 +1173,9 @@ static int mxcmci_probe(struct platform_device *pdev)
                dma_release_channel(host->dma);
 
 out_clk_put:
-       clk_disable_unprepare(host->clk_per);
        clk_disable_unprepare(host->clk_ipg);
+out_clk_per_put:
+       clk_disable_unprepare(host->clk_per);
 
 out_free:
        mmc_free_host(mmc);
@@ -1212,10 +1218,17 @@ static int __maybe_unused mxcmci_resume(struct device 
*dev)
 {
        struct mmc_host *mmc = dev_get_drvdata(dev);
        struct mxcmci_host *host = mmc_priv(mmc);
+       int ret;
 
-       clk_prepare_enable(host->clk_per);
-       clk_prepare_enable(host->clk_ipg);
-       return 0;
+       ret = clk_prepare_enable(host->clk_per);
+       if (ret)
+               return ret;
+
+       ret = clk_prepare_enable(host->clk_ipg);
+       if (ret)
+               clk_disable_unprepare(host->clk_per);
+
+       return ret;
 }
 
 static SIMPLE_DEV_PM_OPS(mxcmci_pm_ops, mxcmci_suspend, mxcmci_resume);
-- 
1.9.1