From b520cbe5be37b1b9b401c0b6ecbdae32575273db Mon Sep 17 00:00:00 2001 From: Miaoqian Lin Date: Sun, 3 Apr 2022 05:49:12 +0000 Subject: rtc: ftrtc010: Fix error handling in ftrtc010_rtc_probe In the error handling path, the clk_prepare_enable() function call should be balanced by a corresponding 'clk_disable_unprepare()' call , as already done in the remove function. clk_disable_unprepare calls clk_disable() and clk_unprepare(). They will use IS_ERR_OR_NULL to check the argument. Fixes: ac05fba39cc5 ("rtc: gemini: Add optional clock handling") Signed-off-by: Miaoqian Lin Reviewed-by: Linus Walleij Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20220403054912.31739-1-linmq006@gmail.com --- drivers/rtc/rtc-ftrtc010.c | 34 ++++++++++++++++++++++++---------- 1 file changed, 24 insertions(+), 10 deletions(-) (limited to 'drivers/rtc/rtc-ftrtc010.c') diff --git a/drivers/rtc/rtc-ftrtc010.c b/drivers/rtc/rtc-ftrtc010.c index 53bb08fe1cd4..25c6e7d9570f 100644 --- a/drivers/rtc/rtc-ftrtc010.c +++ b/drivers/rtc/rtc-ftrtc010.c @@ -137,26 +137,34 @@ static int ftrtc010_rtc_probe(struct platform_device *pdev) ret = clk_prepare_enable(rtc->extclk); if (ret) { dev_err(dev, "failed to enable EXTCLK\n"); - return ret; + goto err_disable_pclk; } } rtc->rtc_irq = platform_get_irq(pdev, 0); - if (rtc->rtc_irq < 0) - return rtc->rtc_irq; + if (rtc->rtc_irq < 0) { + ret = rtc->rtc_irq; + goto err_disable_extclk; + } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; + if (!res) { + ret = -ENODEV; + goto err_disable_extclk; + } rtc->rtc_base = devm_ioremap(dev, res->start, resource_size(res)); - if (!rtc->rtc_base) - return -ENOMEM; + if (!rtc->rtc_base) { + ret = -ENOMEM; + goto err_disable_extclk; + } rtc->rtc_dev = devm_rtc_allocate_device(dev); - if (IS_ERR(rtc->rtc_dev)) - return PTR_ERR(rtc->rtc_dev); + if (IS_ERR(rtc->rtc_dev)) { + ret = PTR_ERR(rtc->rtc_dev); + goto err_disable_extclk; + } rtc->rtc_dev->ops = &ftrtc010_rtc_ops; @@ -172,9 +180,15 @@ static int ftrtc010_rtc_probe(struct platform_device *pdev) ret = devm_request_irq(dev, rtc->rtc_irq, ftrtc010_rtc_interrupt, IRQF_SHARED, pdev->name, dev); if (unlikely(ret)) - return ret; + goto err_disable_extclk; return devm_rtc_register_device(rtc->rtc_dev); + +err_disable_extclk: + clk_disable_unprepare(rtc->extclk); +err_disable_pclk: + clk_disable_unprepare(rtc->pclk); + return ret; } static int ftrtc010_rtc_remove(struct platform_device *pdev) -- cgit v1.2.3