From 4e36a8ad4d69fbb52f0f07d9ff340cd6a7a2a503 Mon Sep 17 00:00:00 2001 From: Arvind Yadav Date: Mon, 29 May 2017 13:12:12 +0530 Subject: [PATCH] iio: Aspeed ADC - 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 Reviewed-by: Rick Altherr Signed-off-by: Jonathan Cameron --- drivers/iio/adc/aspeed_adc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c index 62670cbfa2bb..e0ea411a0b2d 100644 --- a/drivers/iio/adc/aspeed_adc.c +++ b/drivers/iio/adc/aspeed_adc.c @@ -212,7 +212,10 @@ static int aspeed_adc_probe(struct platform_device *pdev) } /* Start all channels in normal mode. */ - clk_prepare_enable(data->clk_scaler->clk); + ret = clk_prepare_enable(data->clk_scaler->clk); + if (ret) + goto clk_enable_error; + adc_engine_control_reg_val = GENMASK(31, 16) | ASPEED_OPERATION_MODE_NORMAL | ASPEED_ENGINE_ENABLE; writel(adc_engine_control_reg_val, @@ -236,6 +239,7 @@ iio_register_error: writel(ASPEED_OPERATION_MODE_POWER_DOWN, data->base + ASPEED_REG_ENGINE_CONTROL); clk_disable_unprepare(data->clk_scaler->clk); +clk_enable_error: clk_hw_unregister_divider(data->clk_scaler); scaler_error: -- 2.20.1