diff options
| author | Wei Yang <weiyang@linux.vnet.ibm.com> | 2012-04-26 15:32:55 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-05-07 10:58:57 -0600 |
| commit | 74d24b219bc4ebb20b75d63af2bb577bc1b10b5e (patch) | |
| tree | d6653a2d125e0bbde0c14aa17c54dcfe8c944f34 | |
| parent | 1267b3a325f00291e847ea4a001ccabe5d5516f2 (diff) | |
resources: add resource_overlaps()
Add resource_overlaps(), which returns true if two resources overlap at all.
Use this to replace the complicated check in coalesce_windows().
Signed-Off-By: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| -rw-r--r-- | arch/x86/pci/acpi.c | 12 | ||||
| -rw-r--r-- | include/linux/ioport.h | 7 |
2 files changed, 8 insertions, 11 deletions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index 8a17b23f8c84..fc09c2754e08 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -245,13 +245,6 @@ setup_resource(struct acpi_resource *acpi_res, void *data) return AE_OK; } -static bool resource_contains(struct resource *res, resource_size_t point) -{ - if (res->start <= point && point <= res->end) - return true; - return false; -} - static void coalesce_windows(struct pci_root_info *info, unsigned long type) { int i, j; @@ -272,10 +265,7 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type) * our resources no longer match the ACPI _CRS, but * the kernel resource tree doesn't allow overlaps. */ - if (resource_contains(res1, res2->start) || - resource_contains(res1, res2->end) || - resource_contains(res2, res1->start) || - resource_contains(res2, res1->end)) { + if (resource_overlaps(res1, res2)) { res1->start = min(res1->start, res2->start); res1->end = max(res1->end, res2->end); dev_info(&info->bridge->dev, diff --git a/include/linux/ioport.h b/include/linux/ioport.h index e885ba23de70..589e0e75efae 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -223,5 +223,12 @@ extern int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, void *arg, int (*func)(unsigned long, unsigned long, void *)); +/* True if any part of r1 overlaps r2 */ +static inline bool resource_overlaps(struct resource *r1, struct resource *r2) +{ + return (r1->start <= r2->end && r1->end >= r2->start); +} + + #endif /* __ASSEMBLY__ */ #endif /* _LINUX_IOPORT_H */ |