From 62bbc864d1946c715063bd481bff3641fd1324e2 Mon Sep 17 00:00:00 2001 From: Tobias Jordan Date: Mon, 30 Apr 2018 16:30:06 +0200 Subject: [PATCH] spi: pxa2xx: check clk_prepare_enable() return value clk_prepare_enable() can fail, so its return value should be checked and acted upon. Found by Linux Driver Verification project (linuxtesting.org). Fixes: 3343b7a6d2cd ("spi/pxa2xx: convert to the common clk framework") Signed-off-by: Tobias Jordan Signed-off-by: Mark Brown --- drivers/spi/spi-pxa2xx.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index 40f1346b8188..0b2d60d30f69 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1612,7 +1612,9 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) } /* Enable SOC clock */ - clk_prepare_enable(ssp->clk); + status = clk_prepare_enable(ssp->clk); + if (status) + goto out_error_dma_irq_alloc; master->max_speed_hz = clk_get_rate(ssp->clk); @@ -1716,6 +1718,8 @@ out_error_clock_enabled: pm_runtime_put_noidle(&pdev->dev); pm_runtime_disable(&pdev->dev); clk_disable_unprepare(ssp->clk); + +out_error_dma_irq_alloc: pxa2xx_spi_dma_release(drv_data); free_irq(ssp->irq, drv_data); @@ -1789,8 +1793,11 @@ static int pxa2xx_spi_resume(struct device *dev) int status; /* Enable the SSP clock */ - if (!pm_runtime_suspended(dev)) - clk_prepare_enable(ssp->clk); + if (!pm_runtime_suspended(dev)) { + status = clk_prepare_enable(ssp->clk); + if (status) + return status; + } /* Restore LPSS private register bits */ if (is_lpss_ssp(drv_data)) @@ -1819,9 +1826,10 @@ static int pxa2xx_spi_runtime_suspend(struct device *dev) static int pxa2xx_spi_runtime_resume(struct device *dev) { struct driver_data *drv_data = dev_get_drvdata(dev); + int status; - clk_prepare_enable(drv_data->ssp->clk); - return 0; + status = clk_prepare_enable(drv_data->ssp->clk); + return status; } #endif