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Date: Sat, 3 Mar 2018 22:26:12 +0000 From: Sasha Levin <Alexander.Levin@...rosoft.com> To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "stable@...r.kernel.org" <stable@...r.kernel.org> CC: Alexey Khoroshilov <khoroshilov@...ras.ru>, Alexandre Belloni <alexandre.belloni@...e-electrons.com>, Sasha Levin <Alexander.Levin@...rosoft.com> Subject: [PATCH AUTOSEL for 4.14 21/84] rtc: brcmstb-waketimer: fix error handling in brcmstb_waketmr_probe() From: Alexey Khoroshilov <khoroshilov@...ras.ru> [ Upstream commit f2eef045de9defbc6fc6b72b17f0941cbe26c81d ] brcmstb_waketmr_probe() does not disable timer->clk on error paths. Found by Linux Driver Verification project (linuxtesting.org). Fixes: c4f07ecee22e ("rtc: brcmstb-waketimer: Add Broadcom STB wake-timer") Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru> Reviewed-by: Florian Fainelli <f.fainelli@...il.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com> Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com> --- drivers/rtc/rtc-brcmstb-waketimer.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/rtc/rtc-brcmstb-waketimer.c b/drivers/rtc/rtc-brcmstb-waketimer.c index 796ac792a381..6cee61201c30 100644 --- a/drivers/rtc/rtc-brcmstb-waketimer.c +++ b/drivers/rtc/rtc-brcmstb-waketimer.c @@ -253,7 +253,7 @@ static int brcmstb_waketmr_probe(struct platform_device *pdev) ret = devm_request_irq(dev, timer->irq, brcmstb_waketmr_irq, 0, "brcmstb-waketimer", timer); if (ret < 0) - return ret; + goto err_clk; timer->reboot_notifier.notifier_call = brcmstb_waketmr_reboot; register_reboot_notifier(&timer->reboot_notifier); @@ -262,12 +262,21 @@ static int brcmstb_waketmr_probe(struct platform_device *pdev) &brcmstb_waketmr_ops, THIS_MODULE); if (IS_ERR(timer->rtc)) { dev_err(dev, "unable to register device\n"); - unregister_reboot_notifier(&timer->reboot_notifier); - return PTR_ERR(timer->rtc); + ret = PTR_ERR(timer->rtc); + goto err_notifier; } dev_info(dev, "registered, with irq %d\n", timer->irq); + return 0; + +err_notifier: + unregister_reboot_notifier(&timer->reboot_notifier); + +err_clk: + if (timer->clk) + clk_disable_unprepare(timer->clk); + return ret; } -- 2.14.1
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