Commit | Line | Data |
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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> | |
35 | #include <linux/proc_fs.h> | |
36 | #include <linux/spinlock.h> | |
37 | #include <linux/pm.h> | |
38 | #include <linux/pci.h> | |
39 | #include <linux/acpi.h> | |
40 | #include <acpi/acpi_bus.h> | |
41 | #include <acpi/acpi_drivers.h> | |
42 | ||
1da177e4 | 43 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 44 | ACPI_MODULE_NAME("pci_irq"); |
1da177e4 | 45 | |
f748bafa | 46 | struct acpi_prt_entry { |
3604a9f4 | 47 | struct list_head list; |
f748bafa BH |
48 | struct acpi_pci_id id; |
49 | u8 pin; | |
4eaf6db3 BH |
50 | acpi_handle link; |
51 | u32 index; /* GSI, or link _CRS index */ | |
f748bafa BH |
52 | }; |
53 | ||
3604a9f4 | 54 | static LIST_HEAD(acpi_prt_list); |
1da177e4 LT |
55 | static DEFINE_SPINLOCK(acpi_prt_lock); |
56 | ||
cf68b80b BH |
57 | static inline char pin_name(int pin) |
58 | { | |
e64e9db5 | 59 | return 'A' + pin - 1; |
cf68b80b BH |
60 | } |
61 | ||
1da177e4 LT |
62 | /* -------------------------------------------------------------------------- |
63 | PCI IRQ Routing Table (PRT) Support | |
64 | -------------------------------------------------------------------------- */ | |
65 | ||
063563b4 BH |
66 | static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
67 | int pin) | |
1da177e4 | 68 | { |
3604a9f4 | 69 | struct acpi_prt_entry *entry; |
063563b4 BH |
70 | int segment = pci_domain_nr(dev->bus); |
71 | int bus = dev->bus->number; | |
72 | int device = PCI_SLOT(dev->devfn); | |
1da177e4 | 73 | |
1da177e4 | 74 | spin_lock(&acpi_prt_lock); |
3604a9f4 | 75 | list_for_each_entry(entry, &acpi_prt_list, list) { |
4be44fcd LB |
76 | if ((segment == entry->id.segment) |
77 | && (bus == entry->id.bus) | |
78 | && (device == entry->id.device) | |
79 | && (pin == entry->pin)) { | |
1da177e4 | 80 | spin_unlock(&acpi_prt_lock); |
d550d98d | 81 | return entry; |
1da177e4 LT |
82 | } |
83 | } | |
1da177e4 | 84 | spin_unlock(&acpi_prt_lock); |
d550d98d | 85 | return NULL; |
1da177e4 LT |
86 | } |
87 | ||
391df5dc | 88 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
609d4bc9 | 89 | static const struct dmi_system_id medion_md9580[] = { |
391df5dc BH |
90 | { |
91 | .ident = "Medion MD9580-F laptop", | |
92 | .matches = { | |
93 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), | |
94 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), | |
95 | }, | |
96 | }, | |
97 | { } | |
98 | }; | |
99 | ||
100 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ | |
609d4bc9 | 101 | static const struct dmi_system_id dell_optiplex[] = { |
391df5dc BH |
102 | { |
103 | .ident = "Dell Optiplex GX1", | |
104 | .matches = { | |
105 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
106 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), | |
107 | }, | |
108 | }, | |
109 | { } | |
110 | }; | |
111 | ||
112 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ | |
609d4bc9 | 113 | static const struct dmi_system_id hp_t5710[] = { |
391df5dc BH |
114 | { |
115 | .ident = "HP t5710", | |
116 | .matches = { | |
117 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
118 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), | |
119 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), | |
120 | }, | |
121 | }, | |
122 | { } | |
123 | }; | |
124 | ||
125 | struct prt_quirk { | |
609d4bc9 | 126 | const struct dmi_system_id *system; |
391df5dc BH |
127 | unsigned int segment; |
128 | unsigned int bus; | |
129 | unsigned int device; | |
130 | unsigned char pin; | |
609d4bc9 JB |
131 | const char *source; /* according to BIOS */ |
132 | const char *actual_source; | |
391df5dc BH |
133 | }; |
134 | ||
c458033c BH |
135 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
136 | ||
391df5dc BH |
137 | /* |
138 | * These systems have incorrect _PRT entries. The BIOS claims the PCI | |
139 | * interrupt at the listed segment/bus/device/pin is connected to the first | |
140 | * link device, but it is actually connected to the second. | |
141 | */ | |
609d4bc9 | 142 | static const struct prt_quirk prt_quirks[] = { |
c458033c | 143 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
b97d4803 BH |
144 | "\\_SB_.PCI0.ISA_.LNKA", |
145 | "\\_SB_.PCI0.ISA_.LNKB"}, | |
c458033c | 146 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
391df5dc BH |
147 | "\\_SB_.LNKB", |
148 | "\\_SB_.LNKA"}, | |
c458033c | 149 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
391df5dc BH |
150 | "\\_SB_.PCI0.LNK1", |
151 | "\\_SB_.PCI0.LNK3"}, | |
152 | }; | |
153 | ||
3f0f3c27 BH |
154 | static void do_prt_fixups(struct acpi_prt_entry *entry, |
155 | struct acpi_pci_routing_table *prt) | |
391df5dc BH |
156 | { |
157 | int i; | |
609d4bc9 | 158 | const struct prt_quirk *quirk; |
391df5dc BH |
159 | |
160 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { | |
161 | quirk = &prt_quirks[i]; | |
162 | ||
163 | /* All current quirks involve link devices, not GSIs */ | |
164 | if (!prt->source) | |
165 | continue; | |
166 | ||
167 | if (dmi_check_system(quirk->system) && | |
168 | entry->id.segment == quirk->segment && | |
169 | entry->id.bus == quirk->bus && | |
170 | entry->id.device == quirk->device && | |
c458033c | 171 | entry->pin == quirk->pin && |
391df5dc BH |
172 | !strcmp(prt->source, quirk->source) && |
173 | strlen(prt->source) >= strlen(quirk->actual_source)) { | |
174 | printk(KERN_WARNING PREFIX "firmware reports " | |
c83642d5 | 175 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
391df5dc BH |
176 | "changing to %s\n", |
177 | entry->id.segment, entry->id.bus, | |
cf68b80b | 178 | entry->id.device, pin_name(entry->pin), |
391df5dc BH |
179 | prt->source, quirk->actual_source); |
180 | strcpy(prt->source, quirk->actual_source); | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
3f0f3c27 BH |
185 | static int acpi_pci_irq_add_entry(acpi_handle handle, int segment, int bus, |
186 | struct acpi_pci_routing_table *prt) | |
1da177e4 | 187 | { |
3604a9f4 | 188 | struct acpi_prt_entry *entry; |
1da177e4 | 189 | |
36bcbec7 | 190 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
1da177e4 | 191 | if (!entry) |
d550d98d | 192 | return -ENOMEM; |
1da177e4 | 193 | |
e64e9db5 BH |
194 | /* |
195 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses | |
196 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert | |
197 | * it here. | |
198 | */ | |
1da177e4 LT |
199 | entry->id.segment = segment; |
200 | entry->id.bus = bus; | |
201 | entry->id.device = (prt->address >> 16) & 0xFFFF; | |
e64e9db5 | 202 | entry->pin = prt->pin + 1; |
1da177e4 | 203 | |
391df5dc BH |
204 | do_prt_fixups(entry, prt); |
205 | ||
4eaf6db3 BH |
206 | entry->index = prt->source_index; |
207 | ||
1da177e4 LT |
208 | /* |
209 | * Type 1: Dynamic | |
210 | * --------------- | |
211 | * The 'source' field specifies the PCI interrupt link device used to | |
212 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' | |
213 | * indicates which resource descriptor in the resource template (of | |
214 | * the link device) this interrupt is allocated from. | |
215 | * | |
216 | * NOTE: Don't query the Link Device for IRQ information at this time | |
217 | * because Link Device enumeration may not have occurred yet | |
218 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI | |
219 | * namespace). | |
220 | */ | |
4eaf6db3 BH |
221 | if (prt->source[0]) |
222 | acpi_get_handle(handle, prt->source, &entry->link); | |
223 | ||
1da177e4 LT |
224 | /* |
225 | * Type 2: Static | |
226 | * -------------- | |
227 | * The 'source' field is NULL, and the 'source_index' field specifies | |
228 | * the IRQ value, which is hardwired to specific interrupt inputs on | |
229 | * the interrupt controller. | |
230 | */ | |
1da177e4 LT |
231 | |
232 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
21a53283 | 233 | " %04x:%02x:%02x[%c] -> %s[%d]\n", |
4be44fcd | 234 | entry->id.segment, entry->id.bus, |
cf68b80b | 235 | entry->id.device, pin_name(entry->pin), |
4eaf6db3 | 236 | prt->source, entry->index)); |
1da177e4 LT |
237 | |
238 | spin_lock(&acpi_prt_lock); | |
3604a9f4 | 239 | list_add_tail(&entry->list, &acpi_prt_list); |
1da177e4 LT |
240 | spin_unlock(&acpi_prt_lock); |
241 | ||
d550d98d | 242 | return 0; |
1da177e4 LT |
243 | } |
244 | ||
4be44fcd | 245 | int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus) |
1da177e4 | 246 | { |
2320ac6c BH |
247 | acpi_status status; |
248 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
249 | struct acpi_pci_routing_table *entry; | |
1da177e4 | 250 | |
2320ac6c BH |
251 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
252 | status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
253 | if (ACPI_FAILURE(status)) | |
254 | return -ENODEV; | |
1da177e4 LT |
255 | |
256 | printk(KERN_DEBUG "ACPI: PCI Interrupt Routing Table [%s._PRT]\n", | |
2320ac6c | 257 | (char *) buffer.pointer); |
1da177e4 | 258 | |
2320ac6c | 259 | kfree(buffer.pointer); |
1da177e4 | 260 | |
2320ac6c | 261 | buffer.length = ACPI_ALLOCATE_BUFFER; |
1da177e4 | 262 | buffer.pointer = NULL; |
1da177e4 LT |
263 | |
264 | status = acpi_get_irq_routing_table(handle, &buffer); | |
265 | if (ACPI_FAILURE(status)) { | |
a6fc6720 TR |
266 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRT [%s]", |
267 | acpi_format_exception(status))); | |
1da177e4 | 268 | kfree(buffer.pointer); |
d550d98d | 269 | return -ENODEV; |
1da177e4 LT |
270 | } |
271 | ||
2320ac6c | 272 | entry = buffer.pointer; |
1da177e4 LT |
273 | while (entry && (entry->length > 0)) { |
274 | acpi_pci_irq_add_entry(handle, segment, bus, entry); | |
275 | entry = (struct acpi_pci_routing_table *) | |
4be44fcd | 276 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
277 | } |
278 | ||
2320ac6c | 279 | kfree(buffer.pointer); |
d550d98d | 280 | return 0; |
1da177e4 LT |
281 | } |
282 | ||
4be44fcd | 283 | void acpi_pci_irq_del_prt(int segment, int bus) |
1da177e4 | 284 | { |
3604a9f4 | 285 | struct acpi_prt_entry *entry, *tmp; |
1da177e4 | 286 | |
4be44fcd | 287 | printk(KERN_DEBUG |
21a53283 BH |
288 | "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n", |
289 | segment, bus); | |
1da177e4 | 290 | spin_lock(&acpi_prt_lock); |
3604a9f4 BH |
291 | list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) { |
292 | if (segment == entry->id.segment && bus == entry->id.bus) { | |
293 | list_del(&entry->list); | |
294 | kfree(entry); | |
295 | } | |
1da177e4 LT |
296 | } |
297 | spin_unlock(&acpi_prt_lock); | |
298 | } | |
4be44fcd | 299 | |
1da177e4 LT |
300 | /* -------------------------------------------------------------------------- |
301 | PCI Interrupt Routing Support | |
302 | -------------------------------------------------------------------------- */ | |
3f0f3c27 | 303 | static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) |
1da177e4 | 304 | { |
beba8a64 | 305 | struct acpi_prt_entry *entry; |
5697b7ca BH |
306 | struct pci_dev *bridge; |
307 | u8 bridge_pin, orig_pin = pin; | |
1da177e4 | 308 | |
063563b4 | 309 | entry = acpi_pci_irq_find_prt_entry(dev, pin); |
3b1ea18d BH |
310 | if (entry) { |
311 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", | |
1350487e | 312 | pci_name(dev), pin_name(pin))); |
3b1ea18d | 313 | return entry; |
1da177e4 | 314 | } |
4be44fcd | 315 | |
1da177e4 LT |
316 | /* |
317 | * Attempt to derive an IRQ for this device from a parent bridge's | |
318 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). | |
319 | */ | |
ee401363 BH |
320 | bridge = dev->bus->self; |
321 | while (bridge) { | |
c686d141 | 322 | pin = pci_swizzle_interrupt_pin(dev, pin); |
1da177e4 LT |
323 | |
324 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { | |
325 | /* PC card has the same IRQ as its cardbridge */ | |
8015a014 | 326 | bridge_pin = bridge->pin; |
1da177e4 | 327 | if (!bridge_pin) { |
4be44fcd LB |
328 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
329 | "No interrupt pin configured for device %s\n", | |
330 | pci_name(bridge))); | |
beba8a64 | 331 | return NULL; |
1da177e4 | 332 | } |
1da177e4 LT |
333 | pin = bridge_pin; |
334 | } | |
335 | ||
5697b7ca | 336 | entry = acpi_pci_irq_find_prt_entry(bridge, pin); |
3b1ea18d BH |
337 | if (entry) { |
338 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
339 | "Derived GSI for %s INT %c from %s\n", | |
340 | pci_name(dev), pin_name(orig_pin), | |
341 | pci_name(bridge))); | |
342 | return entry; | |
343 | } | |
ee401363 BH |
344 | |
345 | dev = bridge; | |
346 | bridge = dev->bus->self; | |
1da177e4 LT |
347 | } |
348 | ||
3b1ea18d BH |
349 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
350 | pin_name(orig_pin)); | |
351 | return NULL; | |
1da177e4 LT |
352 | } |
353 | ||
4be44fcd | 354 | int acpi_pci_irq_enable(struct pci_dev *dev) |
1da177e4 | 355 | { |
beba8a64 | 356 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
357 | int gsi; |
358 | u8 pin; | |
50eca3eb BM |
359 | int triggering = ACPI_LEVEL_SENSITIVE; |
360 | int polarity = ACPI_ACTIVE_LOW; | |
4be44fcd | 361 | char *link = NULL; |
c83642d5 | 362 | char link_desc[16]; |
4be44fcd | 363 | int rc; |
1da177e4 | 364 | |
8015a014 | 365 | pin = dev->pin; |
1da177e4 | 366 | if (!pin) { |
4be44fcd LB |
367 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
368 | "No interrupt pin configured for device %s\n", | |
369 | pci_name(dev))); | |
d550d98d | 370 | return 0; |
1da177e4 | 371 | } |
1da177e4 | 372 | |
beba8a64 | 373 | entry = acpi_pci_irq_lookup(dev, pin); |
5697b7ca | 374 | if (!entry) { |
96c2a876 AC |
375 | /* |
376 | * IDE legacy mode controller IRQs are magic. Why do compat | |
377 | * extensions always make such a nasty mess. | |
378 | */ | |
379 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && | |
380 | (dev->class & 0x05) == 0) | |
381 | return 0; | |
382 | } | |
5697b7ca | 383 | |
74f82af1 BH |
384 | if (entry) { |
385 | if (entry->link) | |
386 | gsi = acpi_pci_link_allocate_irq(entry->link, | |
387 | entry->index, | |
388 | &triggering, &polarity, | |
389 | &link); | |
390 | else | |
391 | gsi = entry->index; | |
392 | } else | |
5697b7ca BH |
393 | gsi = -1; |
394 | ||
1da177e4 LT |
395 | /* |
396 | * No IRQ known to the ACPI subsystem - maybe the BIOS / | |
397 | * driver reported one, then use it. Exit in any case. | |
398 | */ | |
c13f889a | 399 | if (gsi < 0) { |
cf68b80b | 400 | dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin)); |
1da177e4 | 401 | /* Interrupt Line values above 0xF are forbidden */ |
44f8e1a2 | 402 | if (dev->irq > 0 && (dev->irq <= 0xF)) { |
1da177e4 | 403 | printk(" - using IRQ %d\n", dev->irq); |
4be44fcd LB |
404 | acpi_register_gsi(dev->irq, ACPI_LEVEL_SENSITIVE, |
405 | ACPI_ACTIVE_LOW); | |
d550d98d | 406 | return 0; |
4be44fcd | 407 | } else { |
1da177e4 | 408 | printk("\n"); |
d550d98d | 409 | return 0; |
1da177e4 | 410 | } |
4be44fcd | 411 | } |
1da177e4 | 412 | |
c13f889a | 413 | rc = acpi_register_gsi(gsi, triggering, polarity); |
349f0d56 | 414 | if (rc < 0) { |
c83642d5 | 415 | dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
cf68b80b | 416 | pin_name(pin)); |
d550d98d | 417 | return rc; |
349f0d56 KK |
418 | } |
419 | dev->irq = rc; | |
1da177e4 | 420 | |
1da177e4 | 421 | if (link) |
c83642d5 BH |
422 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
423 | else | |
424 | link_desc[0] = '\0'; | |
1da177e4 | 425 | |
c83642d5 | 426 | dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
cf68b80b | 427 | pin_name(pin), link_desc, gsi, |
c83642d5 BH |
428 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", |
429 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); | |
1da177e4 | 430 | |
d550d98d | 431 | return 0; |
1da177e4 | 432 | } |
1da177e4 | 433 | |
87bec66b | 434 | /* FIXME: implement x86/x86_64 version */ |
4be44fcd LB |
435 | void __attribute__ ((weak)) acpi_unregister_gsi(u32 i) |
436 | { | |
437 | } | |
87bec66b | 438 | |
4be44fcd | 439 | void acpi_pci_irq_disable(struct pci_dev *dev) |
1da177e4 | 440 | { |
beba8a64 | 441 | struct acpi_prt_entry *entry; |
3f0f3c27 BH |
442 | int gsi; |
443 | u8 pin; | |
1da177e4 | 444 | |
8015a014 | 445 | pin = dev->pin; |
1da177e4 | 446 | if (!pin) |
d550d98d | 447 | return; |
1da177e4 | 448 | |
beba8a64 | 449 | entry = acpi_pci_irq_lookup(dev, pin); |
beba8a64 | 450 | if (!entry) |
d550d98d | 451 | return; |
1da177e4 | 452 | |
74f82af1 BH |
453 | if (entry->link) |
454 | gsi = acpi_pci_link_free_irq(entry->link); | |
455 | else | |
456 | gsi = entry->index; | |
beba8a64 | 457 | |
1da177e4 LT |
458 | /* |
459 | * TBD: It might be worth clearing dev->irq by magic constant | |
460 | * (e.g. PCI_UNDEFINED_IRQ). | |
461 | */ | |
462 | ||
cf68b80b | 463 | dev_info(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
1da177e4 | 464 | acpi_unregister_gsi(gsi); |
1da177e4 | 465 | } |