Commit | Line | Data |
---|---|---|
dd87eb3a TG |
1 | /* |
2 | * linux/kernel/irq/chip.c | |
3 | * | |
4 | * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar | |
5 | * Copyright (C) 2005-2006, Thomas Gleixner, Russell King | |
6 | * | |
7 | * This file contains the core interrupt handling code, for irq-chip | |
8 | * based architectures. | |
9 | * | |
10 | * Detailed information is available in Documentation/DocBook/genericirq | |
11 | */ | |
12 | ||
13 | #include <linux/irq.h> | |
7fe3730d | 14 | #include <linux/msi.h> |
dd87eb3a TG |
15 | #include <linux/module.h> |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/kernel_stat.h> | |
18 | ||
19 | #include "internals.h" | |
20 | ||
3a16d713 EB |
21 | /** |
22 | * dynamic_irq_init - initialize a dynamically allocated irq | |
23 | * @irq: irq number to initialize | |
24 | */ | |
25 | void dynamic_irq_init(unsigned int irq) | |
26 | { | |
27 | struct irq_desc *desc; | |
28 | unsigned long flags; | |
29 | ||
30 | if (irq >= NR_IRQS) { | |
31 | printk(KERN_ERR "Trying to initialize invalid IRQ%d\n", irq); | |
32 | WARN_ON(1); | |
33 | return; | |
34 | } | |
35 | ||
36 | /* Ensure we don't have left over values from a previous use of this irq */ | |
37 | desc = irq_desc + irq; | |
38 | spin_lock_irqsave(&desc->lock, flags); | |
39 | desc->status = IRQ_DISABLED; | |
40 | desc->chip = &no_irq_chip; | |
41 | desc->handle_irq = handle_bad_irq; | |
42 | desc->depth = 1; | |
5b912c10 | 43 | desc->msi_desc = NULL; |
3a16d713 EB |
44 | desc->handler_data = NULL; |
45 | desc->chip_data = NULL; | |
46 | desc->action = NULL; | |
47 | desc->irq_count = 0; | |
48 | desc->irqs_unhandled = 0; | |
49 | #ifdef CONFIG_SMP | |
50 | desc->affinity = CPU_MASK_ALL; | |
51 | #endif | |
52 | spin_unlock_irqrestore(&desc->lock, flags); | |
53 | } | |
54 | ||
55 | /** | |
56 | * dynamic_irq_cleanup - cleanup a dynamically allocated irq | |
57 | * @irq: irq number to initialize | |
58 | */ | |
59 | void dynamic_irq_cleanup(unsigned int irq) | |
60 | { | |
61 | struct irq_desc *desc; | |
62 | unsigned long flags; | |
63 | ||
64 | if (irq >= NR_IRQS) { | |
65 | printk(KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq); | |
66 | WARN_ON(1); | |
67 | return; | |
68 | } | |
69 | ||
70 | desc = irq_desc + irq; | |
71 | spin_lock_irqsave(&desc->lock, flags); | |
1f80025e EB |
72 | if (desc->action) { |
73 | spin_unlock_irqrestore(&desc->lock, flags); | |
74 | printk(KERN_ERR "Destroying IRQ%d without calling free_irq\n", | |
75 | irq); | |
76 | WARN_ON(1); | |
77 | return; | |
78 | } | |
5b912c10 EB |
79 | desc->msi_desc = NULL; |
80 | desc->handler_data = NULL; | |
81 | desc->chip_data = NULL; | |
3a16d713 EB |
82 | desc->handle_irq = handle_bad_irq; |
83 | desc->chip = &no_irq_chip; | |
84 | spin_unlock_irqrestore(&desc->lock, flags); | |
85 | } | |
86 | ||
87 | ||
dd87eb3a TG |
88 | /** |
89 | * set_irq_chip - set the irq chip for an irq | |
90 | * @irq: irq number | |
91 | * @chip: pointer to irq chip description structure | |
92 | */ | |
93 | int set_irq_chip(unsigned int irq, struct irq_chip *chip) | |
94 | { | |
95 | struct irq_desc *desc; | |
96 | unsigned long flags; | |
97 | ||
98 | if (irq >= NR_IRQS) { | |
99 | printk(KERN_ERR "Trying to install chip for IRQ%d\n", irq); | |
100 | WARN_ON(1); | |
101 | return -EINVAL; | |
102 | } | |
103 | ||
104 | if (!chip) | |
105 | chip = &no_irq_chip; | |
106 | ||
107 | desc = irq_desc + irq; | |
108 | spin_lock_irqsave(&desc->lock, flags); | |
109 | irq_chip_set_defaults(chip); | |
110 | desc->chip = chip; | |
dd87eb3a TG |
111 | spin_unlock_irqrestore(&desc->lock, flags); |
112 | ||
113 | return 0; | |
114 | } | |
115 | EXPORT_SYMBOL(set_irq_chip); | |
116 | ||
117 | /** | |
118 | * set_irq_type - set the irq type for an irq | |
119 | * @irq: irq number | |
120 | * @type: interrupt type - see include/linux/interrupt.h | |
121 | */ | |
122 | int set_irq_type(unsigned int irq, unsigned int type) | |
123 | { | |
124 | struct irq_desc *desc; | |
125 | unsigned long flags; | |
126 | int ret = -ENXIO; | |
127 | ||
128 | if (irq >= NR_IRQS) { | |
129 | printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq); | |
130 | return -ENODEV; | |
131 | } | |
132 | ||
133 | desc = irq_desc + irq; | |
134 | if (desc->chip->set_type) { | |
135 | spin_lock_irqsave(&desc->lock, flags); | |
136 | ret = desc->chip->set_type(irq, type); | |
137 | spin_unlock_irqrestore(&desc->lock, flags); | |
138 | } | |
139 | return ret; | |
140 | } | |
141 | EXPORT_SYMBOL(set_irq_type); | |
142 | ||
143 | /** | |
144 | * set_irq_data - set irq type data for an irq | |
145 | * @irq: Interrupt number | |
146 | * @data: Pointer to interrupt specific data | |
147 | * | |
148 | * Set the hardware irq controller data for an irq | |
149 | */ | |
150 | int set_irq_data(unsigned int irq, void *data) | |
151 | { | |
152 | struct irq_desc *desc; | |
153 | unsigned long flags; | |
154 | ||
155 | if (irq >= NR_IRQS) { | |
156 | printk(KERN_ERR | |
157 | "Trying to install controller data for IRQ%d\n", irq); | |
158 | return -EINVAL; | |
159 | } | |
160 | ||
161 | desc = irq_desc + irq; | |
162 | spin_lock_irqsave(&desc->lock, flags); | |
163 | desc->handler_data = data; | |
164 | spin_unlock_irqrestore(&desc->lock, flags); | |
165 | return 0; | |
166 | } | |
167 | EXPORT_SYMBOL(set_irq_data); | |
168 | ||
5b912c10 EB |
169 | /** |
170 | * set_irq_data - set irq type data for an irq | |
171 | * @irq: Interrupt number | |
472900b8 | 172 | * @entry: Pointer to MSI descriptor data |
5b912c10 EB |
173 | * |
174 | * Set the hardware irq controller data for an irq | |
175 | */ | |
176 | int set_irq_msi(unsigned int irq, struct msi_desc *entry) | |
177 | { | |
178 | struct irq_desc *desc; | |
179 | unsigned long flags; | |
180 | ||
181 | if (irq >= NR_IRQS) { | |
182 | printk(KERN_ERR | |
183 | "Trying to install msi data for IRQ%d\n", irq); | |
184 | return -EINVAL; | |
185 | } | |
186 | desc = irq_desc + irq; | |
187 | spin_lock_irqsave(&desc->lock, flags); | |
188 | desc->msi_desc = entry; | |
7fe3730d ME |
189 | if (entry) |
190 | entry->irq = irq; | |
5b912c10 EB |
191 | spin_unlock_irqrestore(&desc->lock, flags); |
192 | return 0; | |
193 | } | |
194 | ||
dd87eb3a TG |
195 | /** |
196 | * set_irq_chip_data - set irq chip data for an irq | |
197 | * @irq: Interrupt number | |
198 | * @data: Pointer to chip specific data | |
199 | * | |
200 | * Set the hardware irq chip data for an irq | |
201 | */ | |
202 | int set_irq_chip_data(unsigned int irq, void *data) | |
203 | { | |
204 | struct irq_desc *desc = irq_desc + irq; | |
205 | unsigned long flags; | |
206 | ||
207 | if (irq >= NR_IRQS || !desc->chip) { | |
208 | printk(KERN_ERR "BUG: bad set_irq_chip_data(IRQ#%d)\n", irq); | |
209 | return -EINVAL; | |
210 | } | |
211 | ||
212 | spin_lock_irqsave(&desc->lock, flags); | |
213 | desc->chip_data = data; | |
214 | spin_unlock_irqrestore(&desc->lock, flags); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | EXPORT_SYMBOL(set_irq_chip_data); | |
219 | ||
220 | /* | |
221 | * default enable function | |
222 | */ | |
223 | static void default_enable(unsigned int irq) | |
224 | { | |
225 | struct irq_desc *desc = irq_desc + irq; | |
226 | ||
227 | desc->chip->unmask(irq); | |
228 | desc->status &= ~IRQ_MASKED; | |
229 | } | |
230 | ||
231 | /* | |
232 | * default disable function | |
233 | */ | |
234 | static void default_disable(unsigned int irq) | |
235 | { | |
dd87eb3a TG |
236 | } |
237 | ||
238 | /* | |
239 | * default startup function | |
240 | */ | |
241 | static unsigned int default_startup(unsigned int irq) | |
242 | { | |
243 | irq_desc[irq].chip->enable(irq); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | /* | |
249 | * Fixup enable/disable function pointers | |
250 | */ | |
251 | void irq_chip_set_defaults(struct irq_chip *chip) | |
252 | { | |
253 | if (!chip->enable) | |
254 | chip->enable = default_enable; | |
255 | if (!chip->disable) | |
256 | chip->disable = default_disable; | |
257 | if (!chip->startup) | |
258 | chip->startup = default_startup; | |
259 | if (!chip->shutdown) | |
260 | chip->shutdown = chip->disable; | |
261 | if (!chip->name) | |
262 | chip->name = chip->typename; | |
b86432b4 ZY |
263 | if (!chip->end) |
264 | chip->end = dummy_irq_chip.end; | |
dd87eb3a TG |
265 | } |
266 | ||
267 | static inline void mask_ack_irq(struct irq_desc *desc, int irq) | |
268 | { | |
269 | if (desc->chip->mask_ack) | |
270 | desc->chip->mask_ack(irq); | |
271 | else { | |
272 | desc->chip->mask(irq); | |
273 | desc->chip->ack(irq); | |
274 | } | |
275 | } | |
276 | ||
277 | /** | |
278 | * handle_simple_irq - Simple and software-decoded IRQs. | |
279 | * @irq: the interrupt number | |
280 | * @desc: the interrupt description structure for this irq | |
dd87eb3a TG |
281 | * |
282 | * Simple interrupts are either sent from a demultiplexing interrupt | |
283 | * handler or come from hardware, where no interrupt hardware control | |
284 | * is necessary. | |
285 | * | |
286 | * Note: The caller is expected to handle the ack, clear, mask and | |
287 | * unmask issues if necessary. | |
288 | */ | |
289 | void fastcall | |
7d12e780 | 290 | handle_simple_irq(unsigned int irq, struct irq_desc *desc) |
dd87eb3a TG |
291 | { |
292 | struct irqaction *action; | |
293 | irqreturn_t action_ret; | |
294 | const unsigned int cpu = smp_processor_id(); | |
295 | ||
296 | spin_lock(&desc->lock); | |
297 | ||
298 | if (unlikely(desc->status & IRQ_INPROGRESS)) | |
299 | goto out_unlock; | |
dd87eb3a TG |
300 | kstat_cpu(cpu).irqs[irq]++; |
301 | ||
302 | action = desc->action; | |
76d21601 IM |
303 | if (unlikely(!action || (desc->status & IRQ_DISABLED))) { |
304 | if (desc->chip->mask) | |
305 | desc->chip->mask(irq); | |
306 | desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); | |
307 | desc->status |= IRQ_PENDING; | |
dd87eb3a | 308 | goto out_unlock; |
76d21601 | 309 | } |
dd87eb3a | 310 | |
76d21601 | 311 | desc->status &= ~(IRQ_REPLAY | IRQ_WAITING | IRQ_PENDING); |
dd87eb3a TG |
312 | desc->status |= IRQ_INPROGRESS; |
313 | spin_unlock(&desc->lock); | |
314 | ||
7d12e780 | 315 | action_ret = handle_IRQ_event(irq, action); |
dd87eb3a | 316 | if (!noirqdebug) |
7d12e780 | 317 | note_interrupt(irq, desc, action_ret); |
dd87eb3a TG |
318 | |
319 | spin_lock(&desc->lock); | |
320 | desc->status &= ~IRQ_INPROGRESS; | |
321 | out_unlock: | |
322 | spin_unlock(&desc->lock); | |
323 | } | |
324 | ||
325 | /** | |
326 | * handle_level_irq - Level type irq handler | |
327 | * @irq: the interrupt number | |
328 | * @desc: the interrupt description structure for this irq | |
dd87eb3a TG |
329 | * |
330 | * Level type interrupts are active as long as the hardware line has | |
331 | * the active level. This may require to mask the interrupt and unmask | |
332 | * it after the associated handler has acknowledged the device, so the | |
333 | * interrupt line is back to inactive. | |
334 | */ | |
335 | void fastcall | |
7d12e780 | 336 | handle_level_irq(unsigned int irq, struct irq_desc *desc) |
dd87eb3a TG |
337 | { |
338 | unsigned int cpu = smp_processor_id(); | |
339 | struct irqaction *action; | |
340 | irqreturn_t action_ret; | |
341 | ||
342 | spin_lock(&desc->lock); | |
343 | mask_ack_irq(desc, irq); | |
344 | ||
345 | if (unlikely(desc->status & IRQ_INPROGRESS)) | |
86998aa6 | 346 | goto out_unlock; |
dd87eb3a TG |
347 | desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); |
348 | kstat_cpu(cpu).irqs[irq]++; | |
349 | ||
350 | /* | |
351 | * If its disabled or no action available | |
352 | * keep it masked and get out of here | |
353 | */ | |
354 | action = desc->action; | |
5a43a066 BH |
355 | if (unlikely(!action || (desc->status & IRQ_DISABLED))) { |
356 | desc->status |= IRQ_PENDING; | |
86998aa6 | 357 | goto out_unlock; |
5a43a066 | 358 | } |
dd87eb3a TG |
359 | |
360 | desc->status |= IRQ_INPROGRESS; | |
5a43a066 | 361 | desc->status &= ~IRQ_PENDING; |
dd87eb3a TG |
362 | spin_unlock(&desc->lock); |
363 | ||
7d12e780 | 364 | action_ret = handle_IRQ_event(irq, action); |
dd87eb3a | 365 | if (!noirqdebug) |
7d12e780 | 366 | note_interrupt(irq, desc, action_ret); |
dd87eb3a TG |
367 | |
368 | spin_lock(&desc->lock); | |
369 | desc->status &= ~IRQ_INPROGRESS; | |
dd87eb3a TG |
370 | if (!(desc->status & IRQ_DISABLED) && desc->chip->unmask) |
371 | desc->chip->unmask(irq); | |
86998aa6 | 372 | out_unlock: |
dd87eb3a TG |
373 | spin_unlock(&desc->lock); |
374 | } | |
375 | ||
376 | /** | |
47c2a3aa | 377 | * handle_fasteoi_irq - irq handler for transparent controllers |
dd87eb3a TG |
378 | * @irq: the interrupt number |
379 | * @desc: the interrupt description structure for this irq | |
dd87eb3a | 380 | * |
47c2a3aa | 381 | * Only a single callback will be issued to the chip: an ->eoi() |
dd87eb3a TG |
382 | * call when the interrupt has been serviced. This enables support |
383 | * for modern forms of interrupt handlers, which handle the flow | |
384 | * details in hardware, transparently. | |
385 | */ | |
386 | void fastcall | |
7d12e780 | 387 | handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc) |
dd87eb3a TG |
388 | { |
389 | unsigned int cpu = smp_processor_id(); | |
390 | struct irqaction *action; | |
391 | irqreturn_t action_ret; | |
392 | ||
393 | spin_lock(&desc->lock); | |
394 | ||
395 | if (unlikely(desc->status & IRQ_INPROGRESS)) | |
396 | goto out; | |
397 | ||
398 | desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); | |
399 | kstat_cpu(cpu).irqs[irq]++; | |
400 | ||
401 | /* | |
402 | * If its disabled or no action available | |
76d21601 | 403 | * then mask it and get out of here: |
dd87eb3a TG |
404 | */ |
405 | action = desc->action; | |
98bb244b BH |
406 | if (unlikely(!action || (desc->status & IRQ_DISABLED))) { |
407 | desc->status |= IRQ_PENDING; | |
76d21601 IM |
408 | if (desc->chip->mask) |
409 | desc->chip->mask(irq); | |
dd87eb3a | 410 | goto out; |
98bb244b | 411 | } |
dd87eb3a TG |
412 | |
413 | desc->status |= IRQ_INPROGRESS; | |
98bb244b | 414 | desc->status &= ~IRQ_PENDING; |
dd87eb3a TG |
415 | spin_unlock(&desc->lock); |
416 | ||
7d12e780 | 417 | action_ret = handle_IRQ_event(irq, action); |
dd87eb3a | 418 | if (!noirqdebug) |
7d12e780 | 419 | note_interrupt(irq, desc, action_ret); |
dd87eb3a TG |
420 | |
421 | spin_lock(&desc->lock); | |
422 | desc->status &= ~IRQ_INPROGRESS; | |
423 | out: | |
47c2a3aa | 424 | desc->chip->eoi(irq); |
dd87eb3a TG |
425 | |
426 | spin_unlock(&desc->lock); | |
427 | } | |
428 | ||
429 | /** | |
430 | * handle_edge_irq - edge type IRQ handler | |
431 | * @irq: the interrupt number | |
432 | * @desc: the interrupt description structure for this irq | |
dd87eb3a TG |
433 | * |
434 | * Interrupt occures on the falling and/or rising edge of a hardware | |
435 | * signal. The occurence is latched into the irq controller hardware | |
436 | * and must be acked in order to be reenabled. After the ack another | |
437 | * interrupt can happen on the same source even before the first one | |
438 | * is handled by the assosiacted event handler. If this happens it | |
439 | * might be necessary to disable (mask) the interrupt depending on the | |
440 | * controller hardware. This requires to reenable the interrupt inside | |
441 | * of the loop which handles the interrupts which have arrived while | |
442 | * the handler was running. If all pending interrupts are handled, the | |
443 | * loop is left. | |
444 | */ | |
445 | void fastcall | |
7d12e780 | 446 | handle_edge_irq(unsigned int irq, struct irq_desc *desc) |
dd87eb3a TG |
447 | { |
448 | const unsigned int cpu = smp_processor_id(); | |
449 | ||
450 | spin_lock(&desc->lock); | |
451 | ||
452 | desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); | |
453 | ||
454 | /* | |
455 | * If we're currently running this IRQ, or its disabled, | |
456 | * we shouldn't process the IRQ. Mark it pending, handle | |
457 | * the necessary masking and go out | |
458 | */ | |
459 | if (unlikely((desc->status & (IRQ_INPROGRESS | IRQ_DISABLED)) || | |
460 | !desc->action)) { | |
461 | desc->status |= (IRQ_PENDING | IRQ_MASKED); | |
462 | mask_ack_irq(desc, irq); | |
463 | goto out_unlock; | |
464 | } | |
465 | ||
466 | kstat_cpu(cpu).irqs[irq]++; | |
467 | ||
468 | /* Start handling the irq */ | |
469 | desc->chip->ack(irq); | |
470 | ||
471 | /* Mark the IRQ currently in progress.*/ | |
472 | desc->status |= IRQ_INPROGRESS; | |
473 | ||
474 | do { | |
475 | struct irqaction *action = desc->action; | |
476 | irqreturn_t action_ret; | |
477 | ||
478 | if (unlikely(!action)) { | |
479 | desc->chip->mask(irq); | |
480 | goto out_unlock; | |
481 | } | |
482 | ||
483 | /* | |
484 | * When another irq arrived while we were handling | |
485 | * one, we could have masked the irq. | |
486 | * Renable it, if it was not disabled in meantime. | |
487 | */ | |
488 | if (unlikely((desc->status & | |
489 | (IRQ_PENDING | IRQ_MASKED | IRQ_DISABLED)) == | |
490 | (IRQ_PENDING | IRQ_MASKED))) { | |
491 | desc->chip->unmask(irq); | |
492 | desc->status &= ~IRQ_MASKED; | |
493 | } | |
494 | ||
495 | desc->status &= ~IRQ_PENDING; | |
496 | spin_unlock(&desc->lock); | |
7d12e780 | 497 | action_ret = handle_IRQ_event(irq, action); |
dd87eb3a | 498 | if (!noirqdebug) |
7d12e780 | 499 | note_interrupt(irq, desc, action_ret); |
dd87eb3a TG |
500 | spin_lock(&desc->lock); |
501 | ||
502 | } while ((desc->status & (IRQ_PENDING | IRQ_DISABLED)) == IRQ_PENDING); | |
503 | ||
504 | desc->status &= ~IRQ_INPROGRESS; | |
505 | out_unlock: | |
506 | spin_unlock(&desc->lock); | |
507 | } | |
508 | ||
509 | #ifdef CONFIG_SMP | |
510 | /** | |
511 | * handle_percpu_IRQ - Per CPU local irq handler | |
512 | * @irq: the interrupt number | |
513 | * @desc: the interrupt description structure for this irq | |
dd87eb3a TG |
514 | * |
515 | * Per CPU interrupts on SMP machines without locking requirements | |
516 | */ | |
517 | void fastcall | |
7d12e780 | 518 | handle_percpu_irq(unsigned int irq, struct irq_desc *desc) |
dd87eb3a TG |
519 | { |
520 | irqreturn_t action_ret; | |
521 | ||
522 | kstat_this_cpu.irqs[irq]++; | |
523 | ||
524 | if (desc->chip->ack) | |
525 | desc->chip->ack(irq); | |
526 | ||
7d12e780 | 527 | action_ret = handle_IRQ_event(irq, desc->action); |
dd87eb3a | 528 | if (!noirqdebug) |
7d12e780 | 529 | note_interrupt(irq, desc, action_ret); |
dd87eb3a TG |
530 | |
531 | if (desc->chip->eoi) | |
532 | desc->chip->eoi(irq); | |
533 | } | |
534 | ||
535 | #endif /* CONFIG_SMP */ | |
536 | ||
537 | void | |
a460e745 IM |
538 | __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, |
539 | const char *name) | |
dd87eb3a TG |
540 | { |
541 | struct irq_desc *desc; | |
542 | unsigned long flags; | |
543 | ||
544 | if (irq >= NR_IRQS) { | |
545 | printk(KERN_ERR | |
546 | "Trying to install type control for IRQ%d\n", irq); | |
547 | return; | |
548 | } | |
549 | ||
550 | desc = irq_desc + irq; | |
551 | ||
552 | if (!handle) | |
553 | handle = handle_bad_irq; | |
9d7ac8be | 554 | else if (desc->chip == &no_irq_chip) { |
f8b5473f | 555 | printk(KERN_WARNING "Trying to install %sinterrupt handler " |
b039db8e | 556 | "for IRQ%d\n", is_chained ? "chained " : "", irq); |
f8b5473f TG |
557 | /* |
558 | * Some ARM implementations install a handler for really dumb | |
559 | * interrupt hardware without setting an irq_chip. This worked | |
560 | * with the ARM no_irq_chip but the check in setup_irq would | |
561 | * prevent us to setup the interrupt at all. Switch it to | |
562 | * dummy_irq_chip for easy transition. | |
563 | */ | |
564 | desc->chip = &dummy_irq_chip; | |
565 | } | |
dd87eb3a TG |
566 | |
567 | spin_lock_irqsave(&desc->lock, flags); | |
568 | ||
569 | /* Uninstall? */ | |
570 | if (handle == handle_bad_irq) { | |
5575ddf7 JB |
571 | if (desc->chip != &no_irq_chip) |
572 | mask_ack_irq(desc, irq); | |
dd87eb3a TG |
573 | desc->status |= IRQ_DISABLED; |
574 | desc->depth = 1; | |
575 | } | |
576 | desc->handle_irq = handle; | |
a460e745 | 577 | desc->name = name; |
dd87eb3a TG |
578 | |
579 | if (handle != handle_bad_irq && is_chained) { | |
580 | desc->status &= ~IRQ_DISABLED; | |
581 | desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE; | |
582 | desc->depth = 0; | |
583 | desc->chip->unmask(irq); | |
584 | } | |
585 | spin_unlock_irqrestore(&desc->lock, flags); | |
586 | } | |
587 | ||
588 | void | |
589 | set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip, | |
57a58a94 | 590 | irq_flow_handler_t handle) |
dd87eb3a TG |
591 | { |
592 | set_irq_chip(irq, chip); | |
a460e745 | 593 | __set_irq_handler(irq, handle, 0, NULL); |
dd87eb3a TG |
594 | } |
595 | ||
a460e745 IM |
596 | void |
597 | set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip, | |
598 | irq_flow_handler_t handle, const char *name) | |
dd87eb3a | 599 | { |
a460e745 IM |
600 | set_irq_chip(irq, chip); |
601 | __set_irq_handler(irq, handle, 0, name); | |
dd87eb3a | 602 | } |