diff options
| author | Fabio Estevam <fabio.estevam@nxp.com> | 2017-05-16 19:08:31 -0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-06-20 10:30:28 +0200 |
| commit | 17b1eb7f0bf3dca2ee2baa283d04187207de5b83 (patch) | |
| tree | a6934e12c95597378fafa188fb2a311458641086 /drivers/mmc/host | |
| parent | 7322238f166c7af8245b5da76d70229d25465142 (diff) | |
| download | linux-17b1eb7f0bf3dca2ee2baa283d04187207de5b83.tar.gz | |
mmc: sdhci-esdhc-imx: Check the return value from clk_prepare_enable()
clk_prepare_enable() may fail, so we should better check its return value and propagate it in the case of error. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/sdhci-esdhc-imx.c | 54 |
1 files changed, 41 insertions, 13 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 23d8b8a73ae9..b5c724184c39 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -1250,14 +1250,20 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) pltfm_host->clk = imx_data->clk_per; pltfm_host->clock = clk_get_rate(pltfm_host->clk); - clk_prepare_enable(imx_data->clk_per); - clk_prepare_enable(imx_data->clk_ipg); - clk_prepare_enable(imx_data->clk_ahb); + err = clk_prepare_enable(imx_data->clk_per); + if (err) + goto free_sdhci; + err = clk_prepare_enable(imx_data->clk_ipg); + if (err) + goto disable_per_clk; + err = clk_prepare_enable(imx_data->clk_ahb); + if (err) + goto disable_ipg_clk; imx_data->pinctrl = devm_pinctrl_get(&pdev->dev); if (IS_ERR(imx_data->pinctrl)) { err = PTR_ERR(imx_data->pinctrl); - goto disable_clk; + goto disable_ahb_clk; } imx_data->pins_default = pinctrl_lookup_state(imx_data->pinctrl, @@ -1297,13 +1303,13 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) else err = sdhci_esdhc_imx_probe_nondt(pdev, host, imx_data); if (err) - goto disable_clk; + goto disable_ahb_clk; sdhci_esdhc_imx_hwinit(host); err = sdhci_add_host(host); if (err) - goto disable_clk; + goto disable_ahb_clk; pm_runtime_set_active(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, 50); @@ -1313,10 +1319,12 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) return 0; -disable_clk: - clk_disable_unprepare(imx_data->clk_per); - clk_disable_unprepare(imx_data->clk_ipg); +disable_ahb_clk: clk_disable_unprepare(imx_data->clk_ahb); +disable_ipg_clk: + clk_disable_unprepare(imx_data->clk_ipg); +disable_per_clk: + clk_disable_unprepare(imx_data->clk_per); free_sdhci: sdhci_pltfm_free(pdev); return err; @@ -1393,14 +1401,34 @@ static int sdhci_esdhc_runtime_resume(struct device *dev) struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); + int err; if (!sdhci_sdio_irq_enabled(host)) { - clk_prepare_enable(imx_data->clk_per); - clk_prepare_enable(imx_data->clk_ipg); + err = clk_prepare_enable(imx_data->clk_per); + if (err) + return err; + err = clk_prepare_enable(imx_data->clk_ipg); + if (err) + goto disable_per_clk; } - clk_prepare_enable(imx_data->clk_ahb); + err = clk_prepare_enable(imx_data->clk_ahb); + if (err) + goto disable_ipg_clk; + err = sdhci_runtime_resume_host(host); + if (err) + goto disable_ahb_clk; + + return 0; - return sdhci_runtime_resume_host(host); +disable_ahb_clk: + clk_disable_unprepare(imx_data->clk_ahb); +disable_ipg_clk: + if (!sdhci_sdio_irq_enabled(host)) + clk_disable_unprepare(imx_data->clk_ipg); +disable_per_clk: + if (!sdhci_sdio_irq_enabled(host)) + clk_disable_unprepare(imx_data->clk_per); + return err; } #endif |