linux-kernel - [patch 2.6.19-rc6] rtc framework handles periodic irqs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 16 Nov 2006 23:12:09 -0800
From:	David Brownell <david-b@...bell.net>
To:	Alessandro Zummo <alessandro.zummo@...ertech.it>,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: [patch 2.6.19-rc6] rtc framework handles periodic irqs

The RTC framework has an irq_set_freq() method that should be used to
manage the periodic IRQ frequency, but the current ioctl logic doesn't
know how to do that.  This patch teaches it how.

This means that drivers implementing irq_set_freq() will automatically
support RTC_IRQP_{READ,SET} ioctls; that logic doesn't need duplication
within the driver.

Signed-off-by: David Brownell <dbrownell@...rs.sourceforge.net>

Index: g26/drivers/rtc/rtc-dev.c
===================================================================
--- g26.orig/drivers/rtc/rtc-dev.c	2006-11-12 12:24:31.000000000 -0800
+++ g26/drivers/rtc/rtc-dev.c	2006-11-12 15:37:17.000000000 -0800
@@ -214,7 +214,7 @@ static int rtc_dev_ioctl(struct inode *i
 	struct rtc_wkalrm alarm;
 	void __user *uarg = (void __user *) arg;
 
-	/* check that the calles has appropriate permissions
+	/* check that the calling task has appropriate permissions
 	 * for certain ioctls. doing this check here is useful
 	 * to avoid duplicate code in each driver.
 	 */
@@ -299,6 +299,17 @@ static int rtc_dev_ioctl(struct inode *i
 
 		err = rtc_set_time(class_dev, &tm);
 		break;
+
+	case RTC_IRQP_READ:
+		if (ops->irq_set_freq)
+			err = put_user(rtc->irq_freq, (unsigned long *) arg);
+		break;
+
+	case RTC_IRQP_SET:
+		if (ops->irq_set_freq)
+			err = rtc_irq_set_freq(class_dev, rtc->irq_task, arg);
+		break;
+
 #if 0
 	case RTC_EPOCH_SET:
 #ifndef rtc_epoch
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/