linux-kernel - [PATCH v2 05/24] PCI: Refactor find_bus_resource_of

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Message-Id: <20250829131113.36754-6-ilpo.jarvinen@linux.intel.com>
Date: Fri, 29 Aug 2025 16:10:54 +0300
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
	linux-pci@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH v2 05/24] PCI: Refactor find_bus_resource_of_type() logic checks

Reorder the logic checks in find_bus_resource_of_type() to simplify them.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
 drivers/pci/setup-bus.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 4097d8703b8f..c5fc4e2825be 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -158,11 +158,15 @@ static struct resource *find_bus_resource_of_type(struct pci_bus *bus,
 	struct resource *r, *r_assigned = NULL;
 
 	pci_bus_for_each_resource(bus, r) {
-		if (r == &ioport_resource || r == &iomem_resource)
+		if (!r || r == &ioport_resource || r == &iomem_resource)
 			continue;
-		if (r && (r->flags & type_mask) == type && !r->parent)
+
+		if ((r->flags & type_mask) != type)
+			continue;
+
+		if (!r->parent)
 			return r;
-		if (r && (r->flags & type_mask) == type && !r_assigned)
+		if (!r_assigned)
 			r_assigned = r;
 	}
 	return r_assigned;
-- 
2.39.5