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Subject[PATCH] rtc: brcmstb-waketimer: fix error handling in brcmstb_waketmr_probe()
Date
brcmstb_waketmr_probe() does not disable timer->clk on error paths.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
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;
}

--
2.7.4
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