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PCI: Move find_bus_resource_of_type() earlier

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Move find_bus_resource_of_type() earlier in setup-bus.c to be able to call
it in upcoming changes.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20250829131113.36754-5-ilpo.jarvinen@linux.intel.com
This commit is contained in:
Ilpo Järvinen 2025-08-29 16:10:53 +03:00 committed by Bjorn Helgaas
parent ae81aad5c2
commit e240edffd0
1 changed files with 28 additions and 28 deletions
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56
drivers/pci/setup-bus.c
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@ -140,6 +140,34 @@ static void restore_dev_resource(struct pci_dev_resource *dev_res)
res->flags = dev_res->flags;
}
/*
* Helper function for sizing routines. Assigned resources have non-NULL
* parent resource.
*
* Return first unassigned resource of the correct type. If there is none,
* return first assigned resource of the correct type. If none of the
* above, return NULL.
*
* Returning an assigned resource of the correct type allows the caller to
* distinguish between already assigned and no resource of the correct type.
*/
static struct resource *find_bus_resource_of_type(struct pci_bus *bus,
unsigned long type_mask,
unsigned long type)
{
struct resource *r, *r_assigned = NULL;
pci_bus_for_each_resource(bus, r) {
if (r == &ioport_resource || r == &iomem_resource)
continue;
if (r && (r->flags & type_mask) == type && !r->parent)
return r;
if (r && (r->flags & type_mask) == type && !r_assigned)
r_assigned = r;
}
return r_assigned;
}
static bool pdev_resources_assignable(struct pci_dev *dev)
{
u16 class = dev->class >> 8, command;
@ -876,34 +904,6 @@ static void pci_bridge_check_ranges(struct pci_bus *bus)
}
}
/*
* Helper function for sizing routines. Assigned resources have non-NULL
* parent resource.
*
* Return first unassigned resource of the correct type. If there is none,
* return first assigned resource of the correct type. If none of the
* above, return NULL.
*
* Returning an assigned resource of the correct type allows the caller to
* distinguish between already assigned and no resource of the correct type.
*/
static struct resource *find_bus_resource_of_type(struct pci_bus *bus,
unsigned long type_mask,
unsigned long type)
{
struct resource *r, *r_assigned = NULL;
pci_bus_for_each_resource(bus, r) {
if (r == &ioport_resource || r == &iomem_resource)
continue;
if (r && (r->flags & type_mask) == type && !r->parent)
return r;
if (r && (r->flags & type_mask) == type && !r_assigned)
r_assigned = r;
}
return r_assigned;
}
static resource_size_t calculate_iosize(resource_size_t size,
resource_size_t min_size,
resource_size_t size1,