change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/kernel/irq/manage.c
..
..
@@ -342,7 +342,7 @@
342
342
 	 * If the interrupt is not yet activated, just store the affinity
343
343
 	 * mask and do not call the chip driver at all. On activation the
344
344
 	 * driver has to make sure anyway that the interrupt is in a
345
-	 * useable state so startup works.
345
+	 * usable state so startup works.
346
346
 	 */
347
347
 	if (!IS_ENABLED(CONFIG_IRQ_DOMAIN_HIERARCHY) ||
348
348
 	    irqd_is_activated(data) || !irqd_affinity_on_activate(data))
..
..
@@ -1000,7 +1000,7 @@
1000
1000
 	 * to IRQS_INPROGRESS and the irq line is masked forever.
1001
1001
 	 *
1002
1002
 	 * This also serializes the state of shared oneshot handlers
1003
-	 * versus "desc->threads_onehsot |= action->thread_mask;" in
1003
+	 * versus "desc->threads_oneshot |= action->thread_mask;" in
1004
1004
 	 * irq_wake_thread(). See the comment there which explains the
1005
1005
 	 * serialization.
1006
1006
 	 */
..
..
@@ -1202,8 +1202,6 @@
1202
1202
 
1203
1203
 	irq_thread_set_ready(desc, action);
1204
1204
 
1205
-	sched_set_fifo(current);
1206
-
1207
1205
 	if (force_irqthreads && test_bit(IRQTF_FORCED_THREAD,
1208
1206
 					&action->thread_flags))
1209
1207
 		handler_fn = irq_forced_thread_fn;
..
..
@@ -1368,6 +1366,8 @@
1368
1366
 
1369
1367
 	if (IS_ERR(t))
1370
1368
 		return PTR_ERR(t);
1369
+
1370
+	sched_set_fifo(t);
1371
1371
 
1372
1372
 	/*
1373
1373
 	 * We keep the reference to the task struct even if
..
..
@@ -1668,7 +1668,8 @@
1668
1668
 			irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
1669
1669
 		}
1670
1670
 
1671
-		if (irq_settings_can_autoenable(desc)) {
1671
+		if (!(new->flags & IRQF_NO_AUTOEN) &&
1672
+		    irq_settings_can_autoenable(desc)) {
1672
1673
 			irq_startup(desc, IRQ_RESEND, IRQ_START_COND);
1673
1674
 		} else {
1674
1675
 			/*
..
..
@@ -1877,7 +1878,7 @@
1877
1878
 	/* Last action releases resources */
1878
1879
 	if (!desc->action) {
1879
1880
 		/*
1880
-		 * Reaquire bus lock as irq_release_resources() might
1881
+		 * Reacquire bus lock as irq_release_resources() might
1881
1882
 		 * require it to deallocate resources over the slow bus.
1882
1883
 		 */
1883
1884
 		chip_bus_lock(desc);
..
..
@@ -2055,10 +2056,15 @@
2055
2056
 	 * which interrupt is which (messes up the interrupt freeing
2056
2057
 	 * logic etc).
2057
2058
 	 *
2059
+	 * Also shared interrupts do not go well with disabling auto enable.
2060
+	 * The sharing interrupt might request it while it's still disabled
2061
+	 * and then wait for interrupts forever.
2062
+	 *
2058
2063
 	 * Also IRQF_COND_SUSPEND only makes sense for shared interrupts and
2059
2064
 	 * it cannot be set along with IRQF_NO_SUSPEND.
2060
2065
 	 */
2061
2066
 	if (((irqflags & IRQF_SHARED) && !dev_id) ||
2067
+	    ((irqflags & IRQF_SHARED) && (irqflags & IRQF_NO_AUTOEN)) ||
2062
2068
 	    (!(irqflags & IRQF_SHARED) && (irqflags & IRQF_COND_SUSPEND)) ||
2063
2069
 	    ((irqflags & IRQF_NO_SUSPEND) && (irqflags & IRQF_COND_SUSPEND)))
2064
2070
 		return -EINVAL;
..
..
@@ -2214,7 +2220,8 @@
2214
2220
 
2215
2221
 	desc = irq_to_desc(irq);
2216
2222
 
2217
-	if (!desc || irq_settings_can_autoenable(desc) ||
2223
+	if (!desc || (irq_settings_can_autoenable(desc) &&
2224
+	    !(irqflags & IRQF_NO_AUTOEN)) ||
2218
2225
 	    !irq_settings_can_request(desc) ||
2219
2226
 	    WARN_ON(irq_settings_is_per_cpu_devid(desc)) ||
2220
2227
 	    !irq_supports_nmi(desc))
..
..
@@ -2750,7 +2757,7 @@
2750
2757
  *	This call sets the internal irqchip state of an interrupt,
2751
2758
  *	depending on the value of @which.
2752
2759
  *
2753
- *	This function should be called with migration disabled if the
2760
+ *	This function should be called with preemption disabled if the
2754
2761
  *	interrupt controller has per-cpu registers.
2755
2762
  */
2756
2763
 int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which,