Re: [PATCH v3 1/3] resource: Use list_head to link sibling resource
From: Baoquan He
Date: Sun May 06 2018 - 02:31:59 EST
On 04/26/18 at 11:01am, kbuild test robot wrote:
> Hi Baoquan,
>
> I love your patch! Yet something to improve:
>
> [auto build test ERROR on linus/master]
> [also build test ERROR on v4.17-rc2 next-20180424]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/Baoquan-He/resource-Use-list_head-to-link-sibling-resource/20180419-223752
> config: microblaze-mmu_defconfig (attached as .config)
> compiler: microblaze-linux-gcc (GCC) 7.2.0
> reproduce:
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # save the attached .config to linux build tree
> make.cross ARCH=microblaze
>
> All errors (new ones prefixed by >>):
Thanks, below patch can fix it. Will repost including the fix.
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index 161f9758c631..56d189cb4be4 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -533,7 +533,9 @@ void pci_process_bridge_OF_ranges(struct pci_controller *hose,
res->flags = range.flags;
res->start = range.cpu_addr;
res->end = range.cpu_addr + range.size - 1;
- res->parent = res->child = res->sibling = NULL;
+ res->parent = NULL;
+ INIT_LIST_HEAD(&res->child);
+ INIT_LIST_HEAD(&res->sibling);
}
}
@@ -625,28 +627,31 @@ EXPORT_SYMBOL(pcibios_add_device);
static int __init reparent_resources(struct resource *parent,
struct resource *res)
{
- struct resource *p, **pp;
- struct resource **firstpp = NULL;
+ struct resource *p, *first = NULL;
- for (pp = &parent->child; (p = *pp) != NULL; pp = &p->sibling) {
+ list_for_each_entry(p, &parent->child, sibling) {
if (p->end < res->start)
continue;
if (res->end < p->start)
break;
if (p->start < res->start || p->end > res->end)
return -1; /* not completely contained */
- if (firstpp == NULL)
- firstpp = pp;
+ if (first == NULL)
+ first = p;
}
- if (firstpp == NULL)
+ if (first == NULL)
return -1; /* didn't find any conflicting entries? */
res->parent = parent;
- res->child = *firstpp;
- res->sibling = *pp;
- *firstpp = res;
- *pp = NULL;
- for (p = res->child; p != NULL; p = p->sibling) {
- p->parent = res;
+ list_add(&res->sibling, &p->sibling.prev);
+ INIT_LIST_HEAD(&res->child);
+
+ /*
+ * From first to p's previous sibling, they all fall into
+ * res's region, change them as res's children.
+ */
+ list_cut_position(&res->child, first->sibling.prev, res->sibling.prev);
+ list_for_each_entry(p, &new->child, sibling) {
+ p->parent = new;
pr_debug("PCI: Reparented %s [%llx..%llx] under %s\n",
p->name,
(unsigned long long)p->start,
>
> arch/microblaze/pci/pci-common.c: In function 'pci_process_bridge_OF_ranges':
> >> arch/microblaze/pci/pci-common.c:536:44: error: incompatible types when assigning to type 'struct list_head' from type 'void *'
> res->parent = res->child = res->sibling = NULL;
> ^
> arch/microblaze/pci/pci-common.c: In function 'reparent_resources':
> >> arch/microblaze/pci/pci-common.c:631:10: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types]
> for (pp = &parent->child; (p = *pp) != NULL; pp = &p->sibling) {
> ^
> arch/microblaze/pci/pci-common.c:631:50: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types]
> for (pp = &parent->child; (p = *pp) != NULL; pp = &p->sibling) {
> ^
> >> arch/microblaze/pci/pci-common.c:644:13: error: incompatible types when assigning to type 'struct list_head' from type 'struct resource *'
> res->child = *firstpp;
> ^
> arch/microblaze/pci/pci-common.c:645:15: error: incompatible types when assigning to type 'struct list_head' from type 'struct resource *'
> res->sibling = *pp;
> ^
> >> arch/microblaze/pci/pci-common.c:648:9: error: incompatible types when assigning to type 'struct resource *' from type 'struct list_head'
> for (p = res->child; p != NULL; p = p->sibling) {
> ^
> arch/microblaze/pci/pci-common.c:648:36: error: incompatible types when assigning to type 'struct resource *' from type 'struct list_head'
> for (p = res->child; p != NULL; p = p->sibling) {
> ^
> cc1: some warnings being treated as errors
>
> vim +536 arch/microblaze/pci/pci-common.c
>
> d3afa58c Michal Simek 2010-01-18 387
> d3afa58c Michal Simek 2010-01-18 388 /**
> d3afa58c Michal Simek 2010-01-18 389 * pci_process_bridge_OF_ranges - Parse PCI bridge resources from device tree
> d3afa58c Michal Simek 2010-01-18 390 * @hose: newly allocated pci_controller to be setup
> d3afa58c Michal Simek 2010-01-18 391 * @dev: device node of the host bridge
> d3afa58c Michal Simek 2010-01-18 392 * @primary: set if primary bus (32 bits only, soon to be deprecated)
> d3afa58c Michal Simek 2010-01-18 393 *
> d3afa58c Michal Simek 2010-01-18 394 * This function will parse the "ranges" property of a PCI host bridge device
> d3afa58c Michal Simek 2010-01-18 395 * node and setup the resource mapping of a pci controller based on its
> d3afa58c Michal Simek 2010-01-18 396 * content.
> d3afa58c Michal Simek 2010-01-18 397 *
> d3afa58c Michal Simek 2010-01-18 398 * Life would be boring if it wasn't for a few issues that we have to deal
> d3afa58c Michal Simek 2010-01-18 399 * with here:
> d3afa58c Michal Simek 2010-01-18 400 *
> d3afa58c Michal Simek 2010-01-18 401 * - We can only cope with one IO space range and up to 3 Memory space
> d3afa58c Michal Simek 2010-01-18 402 * ranges. However, some machines (thanks Apple !) tend to split their
> d3afa58c Michal Simek 2010-01-18 403 * space into lots of small contiguous ranges. So we have to coalesce.
> d3afa58c Michal Simek 2010-01-18 404 *
> d3afa58c Michal Simek 2010-01-18 405 * - We can only cope with all memory ranges having the same offset
> d3afa58c Michal Simek 2010-01-18 406 * between CPU addresses and PCI addresses. Unfortunately, some bridges
> d3afa58c Michal Simek 2010-01-18 407 * are setup for a large 1:1 mapping along with a small "window" which
> d3afa58c Michal Simek 2010-01-18 408 * maps PCI address 0 to some arbitrary high address of the CPU space in
> d3afa58c Michal Simek 2010-01-18 409 * order to give access to the ISA memory hole.
> d3afa58c Michal Simek 2010-01-18 410 * The way out of here that I've chosen for now is to always set the
> d3afa58c Michal Simek 2010-01-18 411 * offset based on the first resource found, then override it if we
> d3afa58c Michal Simek 2010-01-18 412 * have a different offset and the previous was set by an ISA hole.
> d3afa58c Michal Simek 2010-01-18 413 *
> d3afa58c Michal Simek 2010-01-18 414 * - Some busses have IO space not starting at 0, which causes trouble with
> d3afa58c Michal Simek 2010-01-18 415 * the way we do our IO resource renumbering. The code somewhat deals with
> d3afa58c Michal Simek 2010-01-18 416 * it for 64 bits but I would expect problems on 32 bits.
> d3afa58c Michal Simek 2010-01-18 417 *
> d3afa58c Michal Simek 2010-01-18 418 * - Some 32 bits platforms such as 4xx can have physical space larger than
> d3afa58c Michal Simek 2010-01-18 419 * 32 bits so we need to use 64 bits values for the parsing
> d3afa58c Michal Simek 2010-01-18 420 */
> b881bc46 Greg Kroah-Hartman 2012-12-21 421 void pci_process_bridge_OF_ranges(struct pci_controller *hose,
> b881bc46 Greg Kroah-Hartman 2012-12-21 422 struct device_node *dev, int primary)
> d3afa58c Michal Simek 2010-01-18 423 {
> d3afa58c Michal Simek 2010-01-18 424 int memno = 0, isa_hole = -1;
> d3afa58c Michal Simek 2010-01-18 425 unsigned long long isa_mb = 0;
> d3afa58c Michal Simek 2010-01-18 426 struct resource *res;
> 4f7b6de4 Andrew Murray 2013-07-27 427 struct of_pci_range range;
> 4f7b6de4 Andrew Murray 2013-07-27 428 struct of_pci_range_parser parser;
> d3afa58c Michal Simek 2010-01-18 429
> f2b8ae0e Rob Herring 2017-06-06 430 pr_info("PCI host bridge %pOF %s ranges:\n",
> f2b8ae0e Rob Herring 2017-06-06 431 dev, primary ? "(primary)" : "");
> d3afa58c Michal Simek 2010-01-18 432
> 4f7b6de4 Andrew Murray 2013-07-27 433 /* Check for ranges property */
> 4f7b6de4 Andrew Murray 2013-07-27 434 if (of_pci_range_parser_init(&parser, dev))
> d3afa58c Michal Simek 2010-01-18 435 return;
> d3afa58c Michal Simek 2010-01-18 436
> d3afa58c Michal Simek 2010-01-18 437 pr_debug("Parsing ranges property...\n");
> 4f7b6de4 Andrew Murray 2013-07-27 438 for_each_of_pci_range(&parser, &range) {
> d3afa58c Michal Simek 2010-01-18 439 /* Read next ranges element */
> 6bd55f0b Michal Simek 2012-12-27 440 pr_debug("pci_space: 0x%08x pci_addr:0x%016llx ",
> 4f7b6de4 Andrew Murray 2013-07-27 441 range.pci_space, range.pci_addr);
> 6bd55f0b Michal Simek 2012-12-27 442 pr_debug("cpu_addr:0x%016llx size:0x%016llx\n",
> 4f7b6de4 Andrew Murray 2013-07-27 443 range.cpu_addr, range.size);
> d3afa58c Michal Simek 2010-01-18 444
> d3afa58c Michal Simek 2010-01-18 445 /* If we failed translation or got a zero-sized region
> d3afa58c Michal Simek 2010-01-18 446 * (some FW try to feed us with non sensical zero sized regions
> d3afa58c Michal Simek 2010-01-18 447 * such as power3 which look like some kind of attempt
> d3afa58c Michal Simek 2010-01-18 448 * at exposing the VGA memory hole)
> d3afa58c Michal Simek 2010-01-18 449 */
> 4f7b6de4 Andrew Murray 2013-07-27 450 if (range.cpu_addr == OF_BAD_ADDR || range.size == 0)
> d3afa58c Michal Simek 2010-01-18 451 continue;
> d3afa58c Michal Simek 2010-01-18 452
> d3afa58c Michal Simek 2010-01-18 453 /* Act based on address space type */
> d3afa58c Michal Simek 2010-01-18 454 res = NULL;
> 4f7b6de4 Andrew Murray 2013-07-27 455 switch (range.flags & IORESOURCE_TYPE_BITS) {
> 4f7b6de4 Andrew Murray 2013-07-27 456 case IORESOURCE_IO:
> 6bd55f0b Michal Simek 2012-12-27 457 pr_info(" IO 0x%016llx..0x%016llx -> 0x%016llx\n",
> 4f7b6de4 Andrew Murray 2013-07-27 458 range.cpu_addr, range.cpu_addr + range.size - 1,
> 4f7b6de4 Andrew Murray 2013-07-27 459 range.pci_addr);
> d3afa58c Michal Simek 2010-01-18 460
> d3afa58c Michal Simek 2010-01-18 461 /* We support only one IO range */
> d3afa58c Michal Simek 2010-01-18 462 if (hose->pci_io_size) {
> 6bd55f0b Michal Simek 2012-12-27 463 pr_info(" \\--> Skipped (too many) !\n");
> d3afa58c Michal Simek 2010-01-18 464 continue;
> d3afa58c Michal Simek 2010-01-18 465 }
> d3afa58c Michal Simek 2010-01-18 466 /* On 32 bits, limit I/O space to 16MB */
> 4f7b6de4 Andrew Murray 2013-07-27 467 if (range.size > 0x01000000)
> 4f7b6de4 Andrew Murray 2013-07-27 468 range.size = 0x01000000;
> d3afa58c Michal Simek 2010-01-18 469
> d3afa58c Michal Simek 2010-01-18 470 /* 32 bits needs to map IOs here */
> 4f7b6de4 Andrew Murray 2013-07-27 471 hose->io_base_virt = ioremap(range.cpu_addr,
> 4f7b6de4 Andrew Murray 2013-07-27 472 range.size);
> d3afa58c Michal Simek 2010-01-18 473
> d3afa58c Michal Simek 2010-01-18 474 /* Expect trouble if pci_addr is not 0 */
> d3afa58c Michal Simek 2010-01-18 475 if (primary)
> d3afa58c Michal Simek 2010-01-18 476 isa_io_base =
> d3afa58c Michal Simek 2010-01-18 477 (unsigned long)hose->io_base_virt;
> d3afa58c Michal Simek 2010-01-18 478 /* pci_io_size and io_base_phys always represent IO
> d3afa58c Michal Simek 2010-01-18 479 * space starting at 0 so we factor in pci_addr
> d3afa58c Michal Simek 2010-01-18 480 */
> 4f7b6de4 Andrew Murray 2013-07-27 481 hose->pci_io_size = range.pci_addr + range.size;
> 4f7b6de4 Andrew Murray 2013-07-27 482 hose->io_base_phys = range.cpu_addr - range.pci_addr;
> d3afa58c Michal Simek 2010-01-18 483
> d3afa58c Michal Simek 2010-01-18 484 /* Build resource */
> d3afa58c Michal Simek 2010-01-18 485 res = &hose->io_resource;
> 4f7b6de4 Andrew Murray 2013-07-27 486 range.cpu_addr = range.pci_addr;
> 4f7b6de4 Andrew Murray 2013-07-27 487
> d3afa58c Michal Simek 2010-01-18 488 break;
> 4f7b6de4 Andrew Murray 2013-07-27 489 case IORESOURCE_MEM:
> 6bd55f0b Michal Simek 2012-12-27 490 pr_info(" MEM 0x%016llx..0x%016llx -> 0x%016llx %s\n",
> 4f7b6de4 Andrew Murray 2013-07-27 491 range.cpu_addr, range.cpu_addr + range.size - 1,
> 4f7b6de4 Andrew Murray 2013-07-27 492 range.pci_addr,
> 4f7b6de4 Andrew Murray 2013-07-27 493 (range.pci_space & 0x40000000) ?
> 4f7b6de4 Andrew Murray 2013-07-27 494 "Prefetch" : "");
> d3afa58c Michal Simek 2010-01-18 495
> d3afa58c Michal Simek 2010-01-18 496 /* We support only 3 memory ranges */
> d3afa58c Michal Simek 2010-01-18 497 if (memno >= 3) {
> 6bd55f0b Michal Simek 2012-12-27 498 pr_info(" \\--> Skipped (too many) !\n");
> d3afa58c Michal Simek 2010-01-18 499 continue;
> d3afa58c Michal Simek 2010-01-18 500 }
> d3afa58c Michal Simek 2010-01-18 501 /* Handles ISA memory hole space here */
> 4f7b6de4 Andrew Murray 2013-07-27 502 if (range.pci_addr == 0) {
> 4f7b6de4 Andrew Murray 2013-07-27 503 isa_mb = range.cpu_addr;
> d3afa58c Michal Simek 2010-01-18 504 isa_hole = memno;
> d3afa58c Michal Simek 2010-01-18 505 if (primary || isa_mem_base == 0)
> 4f7b6de4 Andrew Murray 2013-07-27 506 isa_mem_base = range.cpu_addr;
> 4f7b6de4 Andrew Murray 2013-07-27 507 hose->isa_mem_phys = range.cpu_addr;
> 4f7b6de4 Andrew Murray 2013-07-27 508 hose->isa_mem_size = range.size;
> d3afa58c Michal Simek 2010-01-18 509 }
> d3afa58c Michal Simek 2010-01-18 510
> d3afa58c Michal Simek 2010-01-18 511 /* We get the PCI/Mem offset from the first range or
> d3afa58c Michal Simek 2010-01-18 512 * the, current one if the offset came from an ISA
> d3afa58c Michal Simek 2010-01-18 513 * hole. If they don't match, bugger.
> d3afa58c Michal Simek 2010-01-18 514 */
> d3afa58c Michal Simek 2010-01-18 515 if (memno == 0 ||
> 4f7b6de4 Andrew Murray 2013-07-27 516 (isa_hole >= 0 && range.pci_addr != 0 &&
> d3afa58c Michal Simek 2010-01-18 517 hose->pci_mem_offset == isa_mb))
> 4f7b6de4 Andrew Murray 2013-07-27 518 hose->pci_mem_offset = range.cpu_addr -
> 4f7b6de4 Andrew Murray 2013-07-27 519 range.pci_addr;
> 4f7b6de4 Andrew Murray 2013-07-27 520 else if (range.pci_addr != 0 &&
> 4f7b6de4 Andrew Murray 2013-07-27 521 hose->pci_mem_offset != range.cpu_addr -
> 4f7b6de4 Andrew Murray 2013-07-27 522 range.pci_addr) {
> 6bd55f0b Michal Simek 2012-12-27 523 pr_info(" \\--> Skipped (offset mismatch) !\n");
> d3afa58c Michal Simek 2010-01-18 524 continue;
> d3afa58c Michal Simek 2010-01-18 525 }
> d3afa58c Michal Simek 2010-01-18 526
> d3afa58c Michal Simek 2010-01-18 527 /* Build resource */
> d3afa58c Michal Simek 2010-01-18 528 res = &hose->mem_resources[memno++];
> d3afa58c Michal Simek 2010-01-18 529 break;
> d3afa58c Michal Simek 2010-01-18 530 }
> 70dcd942 Michal Simek 2014-10-27 531 if (res != NULL) {
> 70dcd942 Michal Simek 2014-10-27 532 res->name = dev->full_name;
> 70dcd942 Michal Simek 2014-10-27 533 res->flags = range.flags;
> 70dcd942 Michal Simek 2014-10-27 534 res->start = range.cpu_addr;
> 70dcd942 Michal Simek 2014-10-27 535 res->end = range.cpu_addr + range.size - 1;
> 70dcd942 Michal Simek 2014-10-27 @536 res->parent = res->child = res->sibling = NULL;
> 70dcd942 Michal Simek 2014-10-27 537 }
> d3afa58c Michal Simek 2010-01-18 538 }
> d3afa58c Michal Simek 2010-01-18 539
> d3afa58c Michal Simek 2010-01-18 540 /* If there's an ISA hole and the pci_mem_offset is -not- matching
> d3afa58c Michal Simek 2010-01-18 541 * the ISA hole offset, then we need to remove the ISA hole from
> d3afa58c Michal Simek 2010-01-18 542 * the resource list for that brige
> d3afa58c Michal Simek 2010-01-18 543 */
> d3afa58c Michal Simek 2010-01-18 544 if (isa_hole >= 0 && hose->pci_mem_offset != isa_mb) {
> d3afa58c Michal Simek 2010-01-18 545 unsigned int next = isa_hole + 1;
> 6bd55f0b Michal Simek 2012-12-27 546 pr_info(" Removing ISA hole at 0x%016llx\n", isa_mb);
> d3afa58c Michal Simek 2010-01-18 547 if (next < memno)
> d3afa58c Michal Simek 2010-01-18 548 memmove(&hose->mem_resources[isa_hole],
> d3afa58c Michal Simek 2010-01-18 549 &hose->mem_resources[next],
> d3afa58c Michal Simek 2010-01-18 550 sizeof(struct resource) * (memno - next));
> d3afa58c Michal Simek 2010-01-18 551 hose->mem_resources[--memno].flags = 0;
> d3afa58c Michal Simek 2010-01-18 552 }
> d3afa58c Michal Simek 2010-01-18 553 }
> d3afa58c Michal Simek 2010-01-18 554
> 9413d968 Bharat Kumar Gogada 2016-09-01 555 /* Display the domain number in /proc */
> d3afa58c Michal Simek 2010-01-18 556 int pci_proc_domain(struct pci_bus *bus)
> d3afa58c Michal Simek 2010-01-18 557 {
> 9413d968 Bharat Kumar Gogada 2016-09-01 558 return pci_domain_nr(bus);
> d3afa58c Michal Simek 2010-01-18 559 }
> d3afa58c Michal Simek 2010-01-18 560
> d3afa58c Michal Simek 2010-01-18 561 /* This header fixup will do the resource fixup for all devices as they are
> d3afa58c Michal Simek 2010-01-18 562 * probed, but not for bridge ranges
> d3afa58c Michal Simek 2010-01-18 563 */
> b881bc46 Greg Kroah-Hartman 2012-12-21 564 static void pcibios_fixup_resources(struct pci_dev *dev)
> d3afa58c Michal Simek 2010-01-18 565 {
> d3afa58c Michal Simek 2010-01-18 566 struct pci_controller *hose = pci_bus_to_host(dev->bus);
> d3afa58c Michal Simek 2010-01-18 567 int i;
> d3afa58c Michal Simek 2010-01-18 568
> d3afa58c Michal Simek 2010-01-18 569 if (!hose) {
> 6bd55f0b Michal Simek 2012-12-27 570 pr_err("No host bridge for PCI dev %s !\n",
> d3afa58c Michal Simek 2010-01-18 571 pci_name(dev));
> d3afa58c Michal Simek 2010-01-18 572 return;
> d3afa58c Michal Simek 2010-01-18 573 }
> d3afa58c Michal Simek 2010-01-18 574 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
> d3afa58c Michal Simek 2010-01-18 575 struct resource *res = dev->resource + i;
> d3afa58c Michal Simek 2010-01-18 576 if (!res->flags)
> d3afa58c Michal Simek 2010-01-18 577 continue;
> e5b36841 Bjorn Helgaas 2012-02-23 578 if (res->start == 0) {
> 6bd55f0b Michal Simek 2012-12-27 579 pr_debug("PCI:%s Resource %d %016llx-%016llx [%x]",
> d3afa58c Michal Simek 2010-01-18 580 pci_name(dev), i,
> d3afa58c Michal Simek 2010-01-18 581 (unsigned long long)res->start,
> d3afa58c Michal Simek 2010-01-18 582 (unsigned long long)res->end,
> d3afa58c Michal Simek 2010-01-18 583 (unsigned int)res->flags);
> 6bd55f0b Michal Simek 2012-12-27 584 pr_debug("is unassigned\n");
> d3afa58c Michal Simek 2010-01-18 585 res->end -= res->start;
> d3afa58c Michal Simek 2010-01-18 586 res->start = 0;
> d3afa58c Michal Simek 2010-01-18 587 res->flags |= IORESOURCE_UNSET;
> d3afa58c Michal Simek 2010-01-18 588 continue;
> d3afa58c Michal Simek 2010-01-18 589 }
> d3afa58c Michal Simek 2010-01-18 590
> aa23bdc0 Bjorn Helgaas 2012-02-23 591 pr_debug("PCI:%s Resource %d %016llx-%016llx [%x]\n",
> d3afa58c Michal Simek 2010-01-18 592 pci_name(dev), i,
> 6bd55f0b Michal Simek 2012-12-27 593 (unsigned long long)res->start,
> d3afa58c Michal Simek 2010-01-18 594 (unsigned long long)res->end,
> d3afa58c Michal Simek 2010-01-18 595 (unsigned int)res->flags);
> d3afa58c Michal Simek 2010-01-18 596 }
> d3afa58c Michal Simek 2010-01-18 597 }
> d3afa58c Michal Simek 2010-01-18 598 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_resources);
> d3afa58c Michal Simek 2010-01-18 599
> d3afa58c Michal Simek 2010-01-18 600 /*
> d3afa58c Michal Simek 2010-01-18 601 * We need to avoid collisions with `mirrored' VGA ports
> d3afa58c Michal Simek 2010-01-18 602 * and other strange ISA hardware, so we always want the
> d3afa58c Michal Simek 2010-01-18 603 * addresses to be allocated in the 0x000-0x0ff region
> d3afa58c Michal Simek 2010-01-18 604 * modulo 0x400.
> d3afa58c Michal Simek 2010-01-18 605 *
> d3afa58c Michal Simek 2010-01-18 606 * Why? Because some silly external IO cards only decode
> d3afa58c Michal Simek 2010-01-18 607 * the low 10 bits of the IO address. The 0x00-0xff region
> d3afa58c Michal Simek 2010-01-18 608 * is reserved for motherboard devices that decode all 16
> d3afa58c Michal Simek 2010-01-18 609 * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
> d3afa58c Michal Simek 2010-01-18 610 * but we want to try to avoid allocating at 0x2900-0x2bff
> d3afa58c Michal Simek 2010-01-18 611 * which might have be mirrored at 0x0100-0x03ff..
> d3afa58c Michal Simek 2010-01-18 612 */
> 01cf9d52 Bharat Kumar Gogada 2016-02-11 613 int pcibios_add_device(struct pci_dev *dev)
> 01cf9d52 Bharat Kumar Gogada 2016-02-11 614 {
> 01cf9d52 Bharat Kumar Gogada 2016-02-11 615 dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
> c86fac43 Michal Simek 2010-04-16 616
> 01cf9d52 Bharat Kumar Gogada 2016-02-11 617 return 0;
> d3afa58c Michal Simek 2010-01-18 618 }
> 01cf9d52 Bharat Kumar Gogada 2016-02-11 619 EXPORT_SYMBOL(pcibios_add_device);
> d3afa58c Michal Simek 2010-01-18 620
> d3afa58c Michal Simek 2010-01-18 621 /*
> d3afa58c Michal Simek 2010-01-18 622 * Reparent resource children of pr that conflict with res
> d3afa58c Michal Simek 2010-01-18 623 * under res, and make res replace those children.
> d3afa58c Michal Simek 2010-01-18 624 */
> d3afa58c Michal Simek 2010-01-18 625 static int __init reparent_resources(struct resource *parent,
> d3afa58c Michal Simek 2010-01-18 626 struct resource *res)
> d3afa58c Michal Simek 2010-01-18 627 {
> d3afa58c Michal Simek 2010-01-18 628 struct resource *p, **pp;
> d3afa58c Michal Simek 2010-01-18 629 struct resource **firstpp = NULL;
> d3afa58c Michal Simek 2010-01-18 630
> d3afa58c Michal Simek 2010-01-18 @631 for (pp = &parent->child; (p = *pp) != NULL; pp = &p->sibling) {
> d3afa58c Michal Simek 2010-01-18 632 if (p->end < res->start)
> d3afa58c Michal Simek 2010-01-18 633 continue;
> d3afa58c Michal Simek 2010-01-18 634 if (res->end < p->start)
> d3afa58c Michal Simek 2010-01-18 635 break;
> d3afa58c Michal Simek 2010-01-18 636 if (p->start < res->start || p->end > res->end)
> d3afa58c Michal Simek 2010-01-18 637 return -1; /* not completely contained */
> d3afa58c Michal Simek 2010-01-18 638 if (firstpp == NULL)
> d3afa58c Michal Simek 2010-01-18 639 firstpp = pp;
> d3afa58c Michal Simek 2010-01-18 640 }
> d3afa58c Michal Simek 2010-01-18 641 if (firstpp == NULL)
> d3afa58c Michal Simek 2010-01-18 642 return -1; /* didn't find any conflicting entries? */
> d3afa58c Michal Simek 2010-01-18 643 res->parent = parent;
> d3afa58c Michal Simek 2010-01-18 @644 res->child = *firstpp;
> d3afa58c Michal Simek 2010-01-18 645 res->sibling = *pp;
> d3afa58c Michal Simek 2010-01-18 646 *firstpp = res;
> d3afa58c Michal Simek 2010-01-18 647 *pp = NULL;
> d3afa58c Michal Simek 2010-01-18 @648 for (p = res->child; p != NULL; p = p->sibling) {
> d3afa58c Michal Simek 2010-01-18 649 p->parent = res;
> d3afa58c Michal Simek 2010-01-18 650 pr_debug("PCI: Reparented %s [%llx..%llx] under %s\n",
> d3afa58c Michal Simek 2010-01-18 651 p->name,
> d3afa58c Michal Simek 2010-01-18 652 (unsigned long long)p->start,
> d3afa58c Michal Simek 2010-01-18 653 (unsigned long long)p->end, res->name);
> d3afa58c Michal Simek 2010-01-18 654 }
> d3afa58c Michal Simek 2010-01-18 655 return 0;
> d3afa58c Michal Simek 2010-01-18 656 }
> d3afa58c Michal Simek 2010-01-18 657
>
> :::::: The code at line 536 was first introduced by commit
> :::::: 70dcd942dc4af3cc6c3dcc2ba499cd841c7f65a7 microblaze: Fix IO space breakage after of_pci_range_to_resource() change
>
> :::::: TO: Michal Simek <michal.simek@xxxxxxxxxx>
> :::::: CC: Michal Simek <michal.simek@xxxxxxxxxx>
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation