Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * pci_irq.c - ACPI PCI Interrupt Routing ($Revision: 11 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * Copyright (C) 2002 Dominik Brodowski <devel@brodo.de> | |
39488b04 BH |
7 | * (c) Copyright 2008 Hewlett-Packard Development Company, L.P. |
8 | * Bjorn Helgaas <bjorn.helgaas@hp.com> | |
1da177e4 LT |
9 | * |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or (at | |
15 | * your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License along | |
23 | * with this program; if not, write to the Free Software Foundation, Inc., | |
24 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | */ | |
28 | ||
1da177e4 | 29 | |
391df5dc | 30 | #include <linux/dmi.h> |
1da177e4 LT |
31 | #include <linux/kernel.h> |
32 | #include <linux/module.h> | |
33 | #include <linux/init.h> | |
34 | #include <linux/types.h> | |
1da177e4 LT |
35 | #include <linux/spinlock.h> |
36 | #include <linux/pm.h> | |
37 | #include <linux/pci.h> | |
38 | #include <linux/acpi.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 LT |
40 | #include <acpi/acpi_bus.h> |
41 | #include <acpi/acpi_drivers.h> | |
42 | ||
a192a958 LB |
43 | #define PREFIX "ACPI: " |
44 | ||
1da177e4 | 45 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 46 | ACPI_MODULE_NAME("pci_irq"); |
1da177e4 | 47 | |
f748bafa | 48 | struct acpi_prt_entry { |
3604a9f4 | 49 | struct list_head list; |
f748bafa BH |
50 | struct acpi_pci_id id; |
51 | u8 pin; | |
4eaf6db3 BH |
52 | acpi_handle link; |
53 | u32 index; /* GSI, or link _CRS index */ | |
f748bafa BH |
54 | }; |
55 | ||
3604a9f4 | 56 | static LIST_HEAD(acpi_prt_list); |
1da177e4 LT |
57 | static DEFINE_SPINLOCK(acpi_prt_lock); |
58 | ||
cf68b80b BH |
59 | static inline char pin_name(int pin) |
60 | { | |
e64e9db5 | 61 | return 'A' + pin - 1; |
cf68b80b BH |
62 | } |
63 | ||
1da177e4 LT |
64 | /* -------------------------------------------------------------------------- |
65 | PCI IRQ Routing Table (PRT) Support | |
66 | -------------------------------------------------------------------------- */ | |
67 | ||
063563b4 BH |
68 | static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
69 | int pin) | |
1da177e4 | 70 | { |
3604a9f4 | 71 | struct acpi_prt_entry *entry; |
063563b4 BH |
72 | int segment = pci_domain_nr(dev->bus); |
73 | int bus = dev->bus->number; | |
74 | int device = PCI_SLOT(dev->devfn); | |
1da177e4 | 75 | |
1da177e4 | 76 | spin_lock(&acpi_prt_lock); |
3604a9f4 | 77 | list_for_each_entry(entry, &acpi_prt_list, list) { |
4be44fcd LB |
78 | if ((segment == entry->id.segment) |
79 | && (bus == entry->id.bus) | |
80 | && (device == entry->id.device) | |
81 | && (pin == entry->pin)) { | |
1da177e4 | 82 | spin_unlock(&acpi_prt_lock); |
d550d98d | 83 | return entry; |
1da177e4 LT |
84 | } |
85 | } | |
1da177e4 | 86 | spin_unlock(&acpi_prt_lock); |
d550d98d | 87 | return NULL; |
1da177e4 LT |
88 | } |
89 | ||
391df5dc | 90 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
609d4bc9 | 91 | static const struct dmi_system_id medion_md9580[] = { |
391df5dc BH |
92 | { |
93 | .ident = "Medion MD9580-F laptop", | |
94 | .matches = { | |
95 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), | |
96 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), | |
97 | }, | |
98 | }, | |
99 | { } | |
100 | }; | |
101 | ||
102 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ | |
609d4bc9 | 103 | static const struct dmi_system_id dell_optiplex[] = { |
391df5dc BH |
104 | { |
105 | .ident = "Dell Optiplex GX1", | |
106 | .matches = { | |
107 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
108 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), | |
109 | }, | |
110 | }, | |
111 | { } | |
112 | }; | |
113 | ||
114 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ | |
609d4bc9 | 115 | static const struct dmi_system_id hp_t5710[] = { |
391df5dc BH |
116 | { |
117 | .ident = "HP t5710", | |
118 | .matches = { | |
119 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
120 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), | |
121 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), | |
122 | }, | |
123 | }, | |
124 | { } | |
125 | }; | |
126 | ||
127 | struct prt_quirk { | |
609d4bc9 | 128 | const struct dmi_system_id *system; |
391df5dc BH |
129 | unsigned int segment; |
130 | unsigned int bus; | |
131 | unsigned int device; | |
132 | unsigned char pin; | |
609d4bc9 JB |
133 | const char *source; /* according to BIOS */ |
134 | const char *actual_source; | |
391df5dc BH |
135 | }; |
136 | ||
c458033c BH |
137 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
138 | ||
391df5dc BH |
139 | /* |
140 | * These systems have incorrect _PRT entries. The BIOS claims the PCI | |
141 | * interrupt at the listed segment/bus/device/pin is connected to the first | |
142 | * link device, but it is actually connected to the second. | |
143 | */ | |
609d4bc9 | 144 | static const struct prt_quirk prt_quirks[] = { |
c458033c | 145 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
b97d4803 BH |
146 | "\\_SB_.PCI0.ISA_.LNKA", |
147 | "\\_SB_.PCI0.ISA_.LNKB"}, | |
c458033c | 148 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
391df5dc BH |
149 | "\\_SB_.LNKB", |
150 | "\\_SB_.LNKA"}, | |
c458033c | 151 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
391df5dc BH |
152 | "\\_SB_.PCI0.LNK1", |
153 | "\\_SB_.PCI0.LNK3"}, | |
154 | }; | |
155 | ||
3f0f3c27 BH |
156 | static void do_prt_fixups(struct acpi_prt_entry *entry, |
157 | struct acpi_pci_routing_table *prt) | |
391df5dc BH |
158 | { |
159 | int i; | |
609d4bc9 | 160 | const struct prt_quirk *quirk; |
391df5dc BH |
161 | |
162 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { | |
163 | quirk = &prt_quirks[i]; | |
164 | ||
165 | /* All current quirks involve link devices, not GSIs */ | |
166 | if (!prt->source) | |
167 | continue; | |
168 | ||
169 | if (dmi_check_system(quirk->system) && | |
170 | entry->id.segment == quirk->segment && | |
171 | entry->id.bus == quirk->bus && | |
172 | entry->id.device == quirk->device && | |
c458033c | 173 | entry->pin == quirk->pin && |
391df5dc BH |
174 | !strcmp(prt->source, quirk->source) && |
175 | strlen(prt->source) >= strlen(quirk->actual_source)) { | |
176 | printk(KERN_WARNING PREFIX "firmware reports " | |
c83642d5 | 177 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
391df5dc BH |
178 | "changing to %s\n", |
179 | entry->id.segment, entry->id.bus, | |
cf68b80b | 180 | entry->id.device, pin_name(entry->pin), |
391df5dc BH |
181 | prt->source, quirk->actual_source); |
182 | strcpy(prt->source, quirk->actual_source); | |
183 | } | |
184 | } | |
185 | } | |
186 | ||
859a3f86 | 187 | static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus, |
3f0f3c27 | 188 | struct acpi_pci_routing_table *prt) |
1da177e4 | 189 | { |
3604a9f4 | 190 | struct acpi_prt_entry *entry; |
1da177e4 | 191 | |
36bcbec7 | 192 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
1da177e4 | 193 | if (!entry) |
d550d98d | 194 | return -ENOMEM; |
1da177e4 | 195 | |
e64e9db5 BH |
196 | /* |
197 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses | |
198 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert | |
199 | * it here. | |
200 | */ | |
859a3f86 AC |
201 | entry->id.segment = pci_domain_nr(bus); |
202 | entry->id.bus = bus->number; | |
1da177e4 | 203 | entry->id.device = (prt->address >> 16) & 0xFFFF; |
e64e9db5 | 204 | entry->pin = prt->pin + 1; |
1da177e4 | 205 | |
391df5dc BH |
206 | do_prt_fixups(entry, prt); |
207 | ||
4eaf6db3 BH |
208 | entry->index = prt->source_index; |
209 | ||
1da177e4 LT |
210 | /* |
211 | * Type 1: Dynamic | |
212 | * --------------- | |
213 | * The 'source' field specifies the PCI interrupt link device used to | |
214 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' | |
215 | * indicates which resource descriptor in the resource template (of | |
216 | * the link device) this interrupt is allocated from. | |
217 | * | |
218 | * NOTE: Don't query the Link Device for IRQ information at this time | |
219 | * because Link Device enumeration may not have occurred yet | |
220 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI | |
221 | * namespace). | |
222 | */ | |
4eaf6db3 BH |
223 | if (prt->source[0]) |
224 | acpi_get_handle(handle, prt->source, &entry->link); | |
225 | ||
1da177e4 LT |
226 | /* |
227 | * Type 2: Static | |
228 | * -------------- | |
229 | * The 'source' field is NULL, and the 'source_index' field specifies | |
230 | * the IRQ value, which is hardwired to specific interrupt inputs on | |
231 | * the interrupt controller. | |
232 | */ | |
1da177e4 LT |
233 | |
234 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
21a53283 | 235 | " %04x:%02x:%02x[%c] -> %s[%d]\n", |
4be44fcd | 236 | entry->id.segment, entry->id.bus, |
cf68b80b | 237 | entry->id.device, pin_name(entry->pin), |
4eaf6db3 | 238 | prt->source, entry->index)); |
1da177e4 LT |
239 | |
240 | spin_lock(&acpi_prt_lock); | |
3604a9f4 | 241 | list_add_tail(&entry->list, &acpi_prt_list); |
1da177e4 LT |
242 | spin_unlock(&acpi_prt_lock); |
243 | ||
d550d98d | 244 | return 0; |
1da177e4 LT |
245 | } |
246 | ||
859a3f86 | 247 | int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus) |
1da177e4 | 248 | { |
2320ac6c BH |
249 | acpi_status status; |
250 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
251 | struct acpi_pci_routing_table *entry; | |
1da177e4 | 252 | |
2320ac6c BH |
253 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
254 | status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
255 | if (ACPI_FAILURE(status)) | |
256 | return -ENODEV; | |
1da177e4 LT |
257 | |
258 | printk(KERN_DEBUG "ACPI: PCI Interrupt Routing Table [%s._PRT]\n", | |
2320ac6c | 259 | (char *) buffer.pointer); |
1da177e4 | 260 | |
2320ac6c | 261 | kfree(buffer.pointer); |
1da177e4 | 262 | |
2320ac6c | 263 | buffer.length = ACPI_ALLOCATE_BUFFER; |
1da177e4 | 264 | buffer.pointer = NULL; |
1da177e4 LT |
265 | |
266 | status = acpi_get_irq_routing_table(handle, &buffer); | |
267 | if (ACPI_FAILURE(status)) { | |
a6fc6720 TR |
268 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRT [%s]", |
269 | acpi_format_exception(status))); | |
1da177e4 | 270 | kfree(buffer.pointer); |
d550d98d | 271 | return -ENODEV; |
1da177e4 LT |
272 | } |
273 | ||
2320ac6c | 274 | entry = buffer.pointer; |
1da177e4 | 275 | while (entry && (entry->length > 0)) { |
859a3f86 | 276 | acpi_pci_irq_add_entry(handle, bus, entry); |
1da177e4 | 277 | entry = (struct acpi_pci_routing_table *) |
4be44fcd | 278 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
279 | } |
280 | ||
2320ac6c | 281 | kfree(buffer.pointer); |
d550d98d | 282 | return 0; |
1da177e4 LT |
283 | } |
284 | ||
d9efae36 | 285 | void acpi_pci_irq_del_prt(struct pci_bus *bus) |
1da177e4 | 286 | { |
3604a9f4 | 287 | struct acpi_prt_entry *entry, *tmp; |
1da177e4 | 288 | |
4be44fcd | 289 | printk(KERN_DEBUG |
21a53283 | 290 | "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n", |
d9efae36 | 291 | pci_domain_nr(bus), bus->number); |
1da177e4 | 292 | spin_lock(&acpi_prt_lock); |
3604a9f4 | 293 | list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) { |
d9efae36 AC |
294 | if (pci_domain_nr(bus) == entry->id.segment |
295 | && bus->number == entry->id.bus) { | |
3604a9f4 BH |
296 | list_del(&entry->list); |
297 | kfree(entry); | |
298 | } | |
1da177e4 LT |
299 | } |
300 | spin_unlock(&acpi_prt_lock); | |
301 | } | |
4be44fcd | 302 | |
1da177e4 LT |
303 | /* -------------------------------------------------------------------------- |
304 | PCI Interrupt Routing Support | |
305 | -------------------------------------------------------------------------- */ | |
3f0f3c27 | 306 | static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) |
1da177e4 | 307 | { |
beba8a64 | 308 | struct acpi_prt_entry *entry; |
5697b7ca BH |
309 | struct pci_dev *bridge; |
310 | u8 bridge_pin, orig_pin = pin; | |
1da177e4 | 311 | |
063563b4 | 312 | entry = acpi_pci_irq_find_prt_entry(dev, pin); |
3b1ea18d BH |
313 | if (entry) { |
314 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", | |
1350487e | 315 | pci_name(dev), pin_name(pin))); |
3b1ea18d | 316 | return entry; |
1da177e4 | 317 | } |
4be44fcd | 318 | |
1da177e4 LT |
319 | /* |
320 | * Attempt to derive an IRQ for this device from a parent bridge's | |
321 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). | |
322 | */ | |
ee401363 BH |
323 | bridge = dev->bus->self; |
324 | while (bridge) { | |
c686d141 | 325 | pin = pci_swizzle_interrupt_pin(dev, pin); |
1da177e4 LT |
326 | |
327 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { | |
328 | /* PC card has the same IRQ as its cardbridge */ | |
8015a014 | 329 | bridge_pin = bridge->pin; |
1da177e4 | 330 | if (!bridge_pin) { |
4be44fcd LB |
331 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
332 | "No interrupt pin configured for device %s\n", | |
333 | pci_name(bridge))); | |
beba8a64 | 334 | return NULL; |
1da177e4 | 335 | } |
1da177e4 LT |
336 | pin = bridge_pin; |
337 | } | |
338 | ||
5697b7ca | 339 | entry = acpi_pci_irq_find_prt_entry(bridge, pin); |
3b1ea18d BH |
340 | if (entry) { |
341 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
342 | "Derived GSI for %s INT %c from %s\n", | |
343 | pci_name(dev), pin_name(orig_pin), | |
344 | pci_name(bridge))); | |
345 | return entry; | |
346 | } | |
ee401363 BH |
347 | |
348 | dev = bridge; | |
349 | bridge = dev->bus->self; | |
1da177e4 LT |
350 | } |
351 | ||
3b1ea18d BH |
352 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
353 | pin_name(orig_pin)); | |
354 | return NULL; | |
1da177e4 LT |
355 | } |
356 | ||
4be44fcd | 357 | int acpi_pci_irq_enable(struct pci_dev *dev) |
1da177e4 | 358 | { |
beba8a64 | 359 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
360 | int gsi; |
361 | u8 pin; | |
50eca3eb BM |
362 | int triggering = ACPI_LEVEL_SENSITIVE; |
363 | int polarity = ACPI_ACTIVE_LOW; | |
4be44fcd | 364 | char *link = NULL; |
c83642d5 | 365 | char link_desc[16]; |
4be44fcd | 366 | int rc; |
1da177e4 | 367 | |
8015a014 | 368 | pin = dev->pin; |
1da177e4 | 369 | if (!pin) { |
4be44fcd LB |
370 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
371 | "No interrupt pin configured for device %s\n", | |
372 | pci_name(dev))); | |
d550d98d | 373 | return 0; |
1da177e4 | 374 | } |
1da177e4 | 375 | |
beba8a64 | 376 | entry = acpi_pci_irq_lookup(dev, pin); |
5697b7ca | 377 | if (!entry) { |
96c2a876 AC |
378 | /* |
379 | * IDE legacy mode controller IRQs are magic. Why do compat | |
380 | * extensions always make such a nasty mess. | |
381 | */ | |
382 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && | |
383 | (dev->class & 0x05) == 0) | |
384 | return 0; | |
385 | } | |
5697b7ca | 386 | |
74f82af1 BH |
387 | if (entry) { |
388 | if (entry->link) | |
389 | gsi = acpi_pci_link_allocate_irq(entry->link, | |
390 | entry->index, | |
391 | &triggering, &polarity, | |
392 | &link); | |
393 | else | |
394 | gsi = entry->index; | |
395 | } else | |
5697b7ca BH |
396 | gsi = -1; |
397 | ||
1da177e4 LT |
398 | /* |
399 | * No IRQ known to the ACPI subsystem - maybe the BIOS / | |
400 | * driver reported one, then use it. Exit in any case. | |
401 | */ | |
c13f889a | 402 | if (gsi < 0) { |
414d3448 | 403 | u32 dev_gsi; |
cf68b80b | 404 | dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin)); |
1da177e4 | 405 | /* Interrupt Line values above 0xF are forbidden */ |
414d3448 EB |
406 | if (dev->irq > 0 && (dev->irq <= 0xF) && |
407 | (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) { | |
408 | printk(" - using ISA IRQ %d\n", dev->irq); | |
409 | acpi_register_gsi(&dev->dev, dev_gsi, | |
a2f809b0 | 410 | ACPI_LEVEL_SENSITIVE, |
4be44fcd | 411 | ACPI_ACTIVE_LOW); |
d550d98d | 412 | return 0; |
4be44fcd | 413 | } else { |
1da177e4 | 414 | printk("\n"); |
d550d98d | 415 | return 0; |
1da177e4 | 416 | } |
4be44fcd | 417 | } |
1da177e4 | 418 | |
a2f809b0 | 419 | rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity); |
349f0d56 | 420 | if (rc < 0) { |
c83642d5 | 421 | dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
cf68b80b | 422 | pin_name(pin)); |
d550d98d | 423 | return rc; |
349f0d56 KK |
424 | } |
425 | dev->irq = rc; | |
1da177e4 | 426 | |
1da177e4 | 427 | if (link) |
c83642d5 BH |
428 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
429 | else | |
430 | link_desc[0] = '\0'; | |
1da177e4 | 431 | |
c83642d5 | 432 | dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
cf68b80b | 433 | pin_name(pin), link_desc, gsi, |
c83642d5 BH |
434 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", |
435 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); | |
1da177e4 | 436 | |
d550d98d | 437 | return 0; |
1da177e4 | 438 | } |
1da177e4 | 439 | |
87bec66b | 440 | /* FIXME: implement x86/x86_64 version */ |
4be44fcd LB |
441 | void __attribute__ ((weak)) acpi_unregister_gsi(u32 i) |
442 | { | |
443 | } | |
87bec66b | 444 | |
4be44fcd | 445 | void acpi_pci_irq_disable(struct pci_dev *dev) |
1da177e4 | 446 | { |
beba8a64 | 447 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
448 | int gsi; |
449 | u8 pin; | |
1da177e4 | 450 | |
8015a014 | 451 | pin = dev->pin; |
1da177e4 | 452 | if (!pin) |
d550d98d | 453 | return; |
1da177e4 | 454 | |
beba8a64 | 455 | entry = acpi_pci_irq_lookup(dev, pin); |
beba8a64 | 456 | if (!entry) |
d550d98d | 457 | return; |
1da177e4 | 458 | |
74f82af1 BH |
459 | if (entry->link) |
460 | gsi = acpi_pci_link_free_irq(entry->link); | |
461 | else | |
462 | gsi = entry->index; | |
beba8a64 | 463 | |
1da177e4 LT |
464 | /* |
465 | * TBD: It might be worth clearing dev->irq by magic constant | |
466 | * (e.g. PCI_UNDEFINED_IRQ). | |
467 | */ | |
468 | ||
cf68b80b | 469 | dev_info(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
1da177e4 | 470 | acpi_unregister_gsi(gsi); |
1da177e4 | 471 | } |