resource: Add __resource_contains_unbound() for internal contains checks

__find_resource_space() currently uses resource_contains() but for tentative resources that are not yet crafted into the resource tree. As resource_contains() checks that IORESOURCE_UNSET is not set for either of the resources, the caller has to hack around this problem by clearing the IORESOURCE_UNSET flag (essentially lying to resource_contains()). Instead of the hack, introduce __resource_contains_unbound() for cases like this.

Ilpo Järvinen committed 7 months ago

Commit edfaa811 parent 1ee47162 files · +19 −5Browse files

Showing the changes to kernel (1 of 2 files). Show all

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kernel/resource.c+2−2

@@ -754,7 +754,7 @@ static int __find_resource_space(struct resource root, struct resource old, · 753 unmodified lines
754	754	/* Check for overflow after ALIGN() */
755	755	avail.start = ALIGN(tmp.start, constraint->align);
756	756	avail.end = tmp.end;
757		− avail.flags = new->flags & ~IORESOURCE_UNSET;
	757	+ avail.flags = new->flags;
758	758	if (avail.start >= tmp.start) {
759	759	alloc.flags = avail.flags;
760	760	if (alignf) {
@@ -765,7 +765,7 @@ static int __find_resource_space(struct resource root, struct resource old, · 4 unmodified lines
765	765	}
766	766	alloc.end = alloc.start + size - 1;
767	767	if (alloc.start <= alloc.end &&
768		− resource_contains(&avail, &alloc)) {
	768	+ __resource_contains_unbound(&avail, &alloc)) {
769	769	new->start = alloc.start;
770	770	new->end = alloc.end;
771	771	return 0;