Revert "genirq: Add IRQF_RESUME_EARLY and resume such IRQs earlier"

This reverts commit 0f12a6a.

It causes too many build errors and needs to be done properly.

Reported-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: Christoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Jeremy Fitzhardinge <Jeremy.Fitzhardinge@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/base/sys.c

@@ -471,12 +471,6 @@ int sysdev_resume(void)
 {
 	struct sysdev_class *cls;
 
-	/*
-	 * Called from syscore in mainline but called directly here
-	 * since syscore does not exist in this tree.
-	 */
-	irq_pm_syscore_resume();
-
 	WARN_ONCE(!irqs_disabled(),
 		"Interrupts enabled while resuming system devices\n");
 

drivers/xen/events.c

@@ -536,7 +536,7 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi,
 	if (irq < 0)
 		return irq;
 
-	irqflags |= IRQF_NO_SUSPEND | IRQF_FORCE_RESUME | IRQF_EARLY_RESUME;
+	irqflags |= IRQF_NO_SUSPEND | IRQF_FORCE_RESUME;
 	retval = request_irq(irq, handler, irqflags, devname, dev_id);
 	if (retval != 0) {
 		unbind_from_irq(irq);

include/linux/interrupt.h

@@ -54,8 +54,6 @@
  *                irq line disabled until the threaded handler has been run.
  * IRQF_NO_SUSPEND - Do not disable this IRQ during suspend
  * IRQF_FORCE_RESUME - Force enable it on resume even if IRQF_NO_SUSPEND is set
- * IRQF_EARLY_RESUME - Resume IRQ early during syscore instead of at device
- *                resume time.
  */
 #define IRQF_DISABLED		0x00000020
 #define IRQF_SAMPLE_RANDOM	0x00000040
@@ -68,7 +66,6 @@
 #define IRQF_ONESHOT		0x00002000
 #define IRQF_NO_SUSPEND		0x00004000
 #define IRQF_FORCE_RESUME	0x00008000
-#define IRQF_EARLY_RESUME	0x00020000
 
 #define IRQF_TIMER		(__IRQF_TIMER | IRQF_NO_SUSPEND)
 
@@ -199,7 +196,6 @@ extern void enable_irq(unsigned int irq);
 #ifdef CONFIG_GENERIC_HARDIRQS
 extern void suspend_device_irqs(void);
 extern void resume_device_irqs(void);
-extern void irq_pm_syscore_resume(void);
 #ifdef CONFIG_PM_SLEEP
 extern int check_wakeup_irqs(void);
 #else
@@ -208,7 +204,6 @@ static inline int check_wakeup_irqs(void) { return 0; }
 #else
 static inline void suspend_device_irqs(void) { };
 static inline void resume_device_irqs(void) { };
-static inline void irq_pm_syscore_resume(void) { };
 static inline int check_wakeup_irqs(void) { return 0; }
 #endif
 

kernel/irq/pm.c

@@ -39,46 +39,25 @@ void suspend_device_irqs(void)
 }
 EXPORT_SYMBOL_GPL(suspend_device_irqs);
 
-static void resume_irqs(bool want_early)
+/**
+ * resume_device_irqs - enable interrupt lines disabled by suspend_device_irqs()
+ *
+ * Enable all interrupt lines previously disabled by suspend_device_irqs() that
+ * have the IRQ_SUSPENDED flag set.
+ */
+void resume_device_irqs(void)
 {
 	struct irq_desc *desc;
 	int irq;
 
 	for_each_irq_desc(irq, desc) {
 		unsigned long flags;
-		bool is_early = desc->action &&
-			desc->action->flags & IRQF_EARLY_RESUME;
-
-		if (is_early != want_early)
-			continue;
 
 		spin_lock_irqsave(&desc->lock, flags);
 		__enable_irq(desc, irq, true);
 		spin_unlock_irqrestore(&desc->lock, flags);
 	}
 }
-
-/**
- * irq_pm_syscore_ops - enable interrupt lines early
- *
- * Enable all interrupt lines with %IRQF_EARLY_RESUME set.
- */
-void irq_pm_syscore_resume(void)
-{
-	resume_irqs(true);
-}
-
-/**
- * resume_device_irqs - enable interrupt lines disabled by suspend_device_irqs()
- *
- * Enable all non-%IRQF_EARLY_RESUME interrupt lines previously
- * disabled by suspend_device_irqs() that have the IRQS_SUSPENDED flag
- * set as well as those with %IRQF_FORCE_RESUME.
- */
-void resume_device_irqs(void)
-{
-	resume_irqs(false);
-}
 EXPORT_SYMBOL_GPL(resume_device_irqs);
 
 /**