Merge commit '5bc66170dc486556a1e36fd384463536573f4b82' into x86/urgent

From Borislav Petkov <bp@amd64.org>:

Below is a RAS fix which reverts the addition of a sysfs attribute
which we agreed is not needed, post-factum. And this should go in now
because that sysfs attribute is going to end up in 3.7 otherwise and
thus exposed to userspace; removing it then would be a lot harder.

This is done as a merge rather than a simple patch/cherry-pick since
the baseline for this patch was not in the previous x86/urgent.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 16 insertions, 19 deletions

diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 831868904e0..2dfe7a2fb99 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -58,6 +58,7 @@ struct sam9_rtc {
 	struct rtc_device	*rtcdev;
 	u32			imr;
 	void __iomem		*gpbr;
+	int 			irq;
 };
 
 #define rtt_readl(rtc, field) \
@@ -292,7 +293,7 @@ static int __devinit at91_rtc_probe(struct platform_device *pdev)
 {
 	struct resource	*r, *r_gpbr;
 	struct sam9_rtc	*rtc;
-	int		ret;
+	int		ret, irq;
 	u32		mr;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -302,10 +303,18 @@ static int __devinit at91_rtc_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(&pdev->dev, "failed to get interrupt resource\n");
+		return irq;
+	}
+
 	rtc = kzalloc(sizeof *rtc, GFP_KERNEL);
 	if (!rtc)
 		return -ENOMEM;
 
+	rtc->irq = irq;
+
 	/* platform setup code should have handled this; sigh */
 	if (!device_can_wakeup(&pdev->dev))
 		device_init_wakeup(&pdev->dev, 1);
@@ -345,11 +354,10 @@ static int __devinit at91_rtc_probe(struct platform_device *pdev)
 	}
 
 	/* register irq handler after we know what name we'll use */
-	ret = request_irq(AT91_ID_SYS, at91_rtc_interrupt,
-				IRQF_SHARED,
+	ret = request_irq(rtc->irq, at91_rtc_interrupt, IRQF_SHARED,
 				dev_name(&rtc->rtcdev->dev), rtc);
 	if (ret) {
-		dev_dbg(&pdev->dev, "can't share IRQ %d?\n", AT91_ID_SYS);
+		dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq);
 		rtc_device_unregister(rtc->rtcdev);
 		goto fail_register;
 	}
@@ -386,7 +394,7 @@ static int __devexit at91_rtc_remove(struct platform_device *pdev)
 
 	/* disable all interrupts */
 	rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));
-	free_irq(AT91_ID_SYS, rtc);
+	free_irq(rtc->irq, rtc);
 
 	rtc_device_unregister(rtc->rtcdev);
 
@@ -423,7 +431,7 @@ static int at91_rtc_suspend(struct platform_device *pdev,
 	rtc->imr = mr & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);
 	if (rtc->imr) {
 		if (device_may_wakeup(&pdev->dev) && (mr & AT91_RTT_ALMIEN)) {
-			enable_irq_wake(AT91_ID_SYS);
+			enable_irq_wake(rtc->irq);
 			/* don't let RTTINC cause wakeups */
 			if (mr & AT91_RTT_RTTINCIEN)
 				rtt_writel(rtc, MR, mr & ~AT91_RTT_RTTINCIEN);
@@ -441,7 +449,7 @@ static int at91_rtc_resume(struct platform_device *pdev)
 
 	if (rtc->imr) {
 		if (device_may_wakeup(&pdev->dev))
-			disable_irq_wake(AT91_ID_SYS);
+			disable_irq_wake(rtc->irq);
 		mr = rtt_readl(rtc, MR);
 		rtt_writel(rtc, MR, mr | rtc->imr);
 	}
@@ -465,18 +473,7 @@ static struct platform_driver at91_rtc_driver = {
 	},
 };
 
-static int __init at91_rtc_init(void)
-{
-	return platform_driver_register(&at91_rtc_driver);
-}
-module_init(at91_rtc_init);
-
-static void __exit at91_rtc_exit(void)
-{
-	platform_driver_unregister(&at91_rtc_driver);
-}
-module_exit(at91_rtc_exit);
-
+module_platform_driver(at91_rtc_driver);
 
 MODULE_AUTHOR("Michel Benoit");
 MODULE_DESCRIPTION("RTC driver for Atmel AT91SAM9x");