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resource: Add __resource_contains_unbound() for internal contains checks

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__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.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Xifer <xiferdev@gmail.com>
Link: https://patch.msgid.link/20260324165633.4583-2-ilpo.jarvinen@linux.intel.com
This commit is contained in:
Ilpo Järvinen
2026-03-24 18:56:24 +02:00
committed by Bjorn Helgaas
parent 1ee4716a5a
commit edfaa81d5d
2 changed files with 19 additions and 5 deletions
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4
kernel/resource.c
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@@ -754,7 +754,7 @@ static int __find_resource_space(struct resource *root, struct resource *old,
/* Check for overflow after ALIGN() */
avail.start = ALIGN(tmp.start, constraint->align);
avail.end = tmp.end;
avail.flags = new->flags & ~IORESOURCE_UNSET;
avail.flags = new->flags;
if (avail.start >= tmp.start) {
alloc.flags = avail.flags;
if (alignf) {
@@ -765,7 +765,7 @@ static int __find_resource_space(struct resource *root, struct resource *old,
}
alloc.end = alloc.start + size - 1;
if (alloc.start <= alloc.end &&
resource_contains(&avail, &alloc)) {
__resource_contains_unbound(&avail, &alloc)) {
new->start = alloc.start;
new->end = alloc.end;
return 0;