[rtc-linux] [PATCH v1 1/1] rtc: cmos: prevent kernel warning on IRQ flags mismatch
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: 2015-12-23 17:37:22
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
The Microsoft Surface 3 tablet shares interrupt line between RTC and one of SPI controllers. However, the rtc_cmos driver doesn't allow shared interrupts and user sees the following warning genirq: Flags mismatch irq 8. 00000080 (8086228E:02) vs. 00000000 (rtc0) ... [<ffffffffa004eb01>] pxa2xx_spi_probe+0x151/0x600 [spi_pxa2xx_platform] Allow RTC driver to use shared interrupts. Seems we are on the safe side to do just this simple change since cmos_interrupt() handler checks for the actual hardware status anyway. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/rtc/rtc-cmos.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 8f7034b..84fb541 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c@@ -725,7 +725,7 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) rtc_cmos_int_handler = cmos_interrupt; retval = request_irq(rtc_irq, rtc_cmos_int_handler, - 0, dev_name(&cmos_rtc.rtc->dev), + IRQF_SHARED, dev_name(&cmos_rtc.rtc->dev), cmos_rtc.rtc); if (retval < 0) { dev_dbg(dev, "IRQ %d is already in use\n", rtc_irq);
--
2.6.4
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