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rtc: st-lpc: Use IRQF_NO_AUTOEN flag in request_irq()

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[ Upstream commit b6cd7adec0cf03f0aefc55676e71dd721cbc71a8 ]

If request_irq() fails in st_rtc_probe(), there is no need to enable
the irq, and if it succeeds, disable_irq() after request_irq() still has
a time gap in which interrupts can come.

request_irq() with IRQF_NO_AUTOEN flag will disable IRQ auto-enable when
request IRQ.

Fixes: b5b2bdfc2893 ("rtc: st: Add new driver for ST's LPC RTC")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://lore.kernel.org/r/20240912033727.3013951-1-ruanjinjie@huawei.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jinjie Ruan 2024-09-12 11:37:27 +08:00 • committed by Ksawlii
parent bebeed876f
commit 4bf42f2715
1 changed files with 2 additions and 3 deletions
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5
drivers/rtc/rtc-st-lpc.c
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@ -218,15 +218,14 @@ static int st_rtc_probe(struct platform_device *pdev)
return -EINVAL; return -EINVAL;
} }
ret = devm_request_irq(&pdev->dev, rtc->irq, st_rtc_handler, 0, ret = devm_request_irq(&pdev->dev, rtc->irq, st_rtc_handler,
pdev->name, rtc); IRQF_NO_AUTOEN, pdev->name, rtc);
if (ret) { if (ret) {
dev_err(&pdev->dev, "Failed to request irq %i\n", rtc->irq); dev_err(&pdev->dev, "Failed to request irq %i\n", rtc->irq);
return ret; return ret;
} }
enable_irq_wake(rtc->irq); enable_irq_wake(rtc->irq);
disable_irq(rtc->irq);
rtc->clk = devm_clk_get(&pdev->dev, NULL); rtc->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(rtc->clk)) { if (IS_ERR(rtc->clk)) {