linux-kernel - [PATCH 04/24] PCI: Move find_bus_resource_of

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Message-Id: <20250822145605.18172-5-ilpo.jarvinen@linux.intel.com>
Date: Fri, 22 Aug 2025 17:55:45 +0300
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Andreas Larsson <andreas@...sler.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"David S. Miller" <davem@...emloft.net>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	linux-m68k@...ts.linux-m68k.org,
	linux-mips@...r.kernel.org,
	linux-pci@...r.kernel.org,
	sparclinux@...r.kernel.org,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Christian König <christian.koenig@....com>,
	Yinghai Lu <yinghai@...nel.org>,
	Igor Mammedov <imammedo@...hat.com>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Krzysztof Wilczyński <kw@...ux.com>,
	linux-kernel@...r.kernel.org
Cc: Michał Winiarski <michal.winiarski@...el.com>,
	linuxppc-dev@...ts.ozlabs.org,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH 04/24] PCI: Move find_bus_resource_of_type() earlier

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@...ux.intel.com>
---
 drivers/pci/setup-bus.c | 56 ++++++++++++++++++++---------------------
 1 file changed, 28 insertions(+), 28 deletions(-)

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index def29506700e..4097d8703b8f 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -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,
-- 
2.39.5