FAILED: Patch "PCI: Use resource_set_range() that correctly sets ->end" failed to apply to 6.1-stable tree

The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From 11721c45a8266a9d0c9684153d20e37159465f96 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= <[email protected]>
Date: Mon, 8 Dec 2025 16:56:54 +0200
Subject: [PATCH] PCI: Use resource_set_range() that correctly sets ->end
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

__pci_read_base() sets resource start and end addresses when resource is larger than 4G but pci_bus_addr_t or resource_size_t are not capable of representing 64-bit PCI addresses. This creates a problematic resource that has non-zero flags but the start and end addresses do not yield to resource size of 0 but 1.

Replace custom resource addresses setup with resource_set_range() that correctly sets end address as -1 which results in resource_size() returning 0.

For consistency, also use resource_set_range() in the other branch that does size based resource setup.

---
 drivers/pci/probe.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

index 41183aed8f5d9..ad5ae05aad3c8 100644
@@ -287,8 +287,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 		if ((sizeof(pci_bus_addr_t) < 8 || sizeof(resource_size_t) < 8)
 		    && sz64 > 0x100000000ULL) {
 			res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
-			res->start = 0;
-			res->end = 0;
+			resource_set_range(res, 0, 0);
 			pci_err(dev, "%s: can't handle BAR larger than 4GB (size %#010llx)\n",
 				res_name, (unsigned long long)sz64);
 			goto out;

@@ -297,8 +296,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 		if ((sizeof(pci_bus_addr_t) < 8) && l) {
 			/* Above 32-bit boundary; try to reallocate */
 			res->flags |= IORESOURCE_UNSET;
-			res->start = 0;
-			res->end = sz64 - 1;
+			resource_set_range(res, 0, sz64);
 			pci_info(dev, "%s: can't handle BAR above 4GB (bus address %#010llx)\n",
 				 res_name, (unsigned long long)l64);
 			goto out;

2.51.0