From 7f55eb101d4a751347a0f7d8c6addcdbc513cfda Mon Sep 17 00:00:00 2001 From: Arvind Yadav Date: Tue, 20 Jun 2017 17:27:00 +0530 Subject: [PATCH] mmc: sdhci-st: Handle return value of clk_prepare_enable clk_prepare_enable() can fail here and we must check its return value. Signed-off-by: Arvind Yadav Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci-st.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/sdhci-st.c b/drivers/mmc/host/sdhci-st.c index 68c36c9fa231..198b4cad5e84 100644 --- a/drivers/mmc/host/sdhci-st.c +++ b/drivers/mmc/host/sdhci-st.c @@ -394,8 +394,17 @@ static int sdhci_st_probe(struct platform_device *pdev) goto err_of; } - clk_prepare_enable(clk); - clk_prepare_enable(icnclk); + ret = clk_prepare_enable(clk); + if (ret) { + dev_err(&pdev->dev, "Failed to prepare clock\n"); + goto err_of; + } + + ret = clk_prepare_enable(icnclk); + if (ret) { + dev_err(&pdev->dev, "Failed to prepare icn clock\n"); + goto err_icnclk; + } /* Configure the FlashSS Top registers for setting eMMC TX/RX delay */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, @@ -429,6 +438,7 @@ static int sdhci_st_probe(struct platform_device *pdev) err_out: clk_disable_unprepare(icnclk); +err_icnclk: clk_disable_unprepare(clk); err_of: sdhci_pltfm_free(pdev); @@ -487,9 +497,17 @@ static int sdhci_st_resume(struct device *dev) struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct st_mmc_platform_data *pdata = sdhci_pltfm_priv(pltfm_host); struct device_node *np = dev->of_node; + int ret; + + ret = clk_prepare_enable(pltfm_host->clk); + if (ret) + return ret; - clk_prepare_enable(pltfm_host->clk); - clk_prepare_enable(pdata->icnclk); + ret = clk_prepare_enable(pdata->icnclk); + if (ret) { + clk_disable_unprepare(pltfm_host->clk); + return ret; + } if (pdata->rstc) reset_control_deassert(pdata->rstc); -- 2.20.1