From: Krzysztof Wilczyński <kwilczynski@kernel.org>
Date: Fri, 8 May 2026 04:35:32 +0000 (+0000)
Subject: alpha/PCI: Use PCI resource accessor macros
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=30d01a8c3a13d217921985324ebdce5b404c1ebb;p=thirdparty%2Flinux.git

alpha/PCI: Use PCI resource accessor macros

Replace direct pdev->resource[] accesses with pci_resource_n(), and
open-coded res->flags type checks with pci_resource_is_mem() and
pci_resource_start() helpers.

While at it, move the pci_resource_n() call directly into
pcibios_resource_to_bus() and drop the local struct resource pointer.

No functional changes intended.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260508043543.217179-14-kwilczynski@kernel.org
---

diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c
index 2330ab84d59c..5c29f1d2821c 100644
--- a/arch/alpha/kernel/pci-sysfs.c
+++ b/arch/alpha/kernel/pci-sysfs.c
@@ -70,7 +70,6 @@ static int pci_mmap_resource(struct kobject *kobj,
 {
 	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
 	int barno = (unsigned long)attr->private;
-	struct resource *res = pci_resource_n(pdev, barno);
 	enum pci_mmap_state mmap_type;
 	struct pci_bus_region bar;
 	int ret;
@@ -79,15 +78,16 @@ static int pci_mmap_resource(struct kobject *kobj,
 	if (ret)
 		return ret;
 
-	if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start))
+	if (pci_resource_is_mem(pdev, barno) &&
+	    iomem_is_exclusive(pci_resource_start(pdev, barno)))
 		return -EINVAL;
 
 	if (!__pci_mmap_fits(pdev, barno, vma, sparse))
 		return -EINVAL;
 
-	pcibios_resource_to_bus(pdev->bus, &bar, res);
+	pcibios_resource_to_bus(pdev->bus, &bar, pci_resource_n(pdev, barno));
 	vma->vm_pgoff += bar.start >> (PAGE_SHIFT - (sparse ? 5 : 0));
-	mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
+	mmap_type = pci_resource_is_mem(pdev, barno) ? pci_mmap_mem : pci_mmap_io;
 
 	return hose_mmap_page_range(pdev->sysdata, vma, mmap_type, sparse);
 }
@@ -141,7 +141,7 @@ static int sparse_mem_mmap_fits(struct pci_dev *pdev, int num)
 	long dense_offset;
 	unsigned long sparse_size;
 
-	pcibios_resource_to_bus(pdev->bus, &bar, &pdev->resource[num]);
+	pcibios_resource_to_bus(pdev->bus, &bar, pci_resource_n(pdev, num));
 
 	/* All core logic chips have 4G sparse address space, except
 	   CIA which has 16G (see xxx_SPARSE_MEM and xxx_DENSE_MEM
@@ -181,7 +181,7 @@ static int pci_create_attr(struct pci_dev *pdev, int num)
 	suffix = "";	/* Assume bwx machine, normal resourceN files. */
 	nlen1 = 10;
 
-	if (pdev->resource[num].flags & IORESOURCE_MEM) {
+	if (pci_resource_is_mem(pdev, num)) {
 		sparse_base = hose->sparse_mem_base;
 		dense_base = hose->dense_mem_base;
 		if (sparse_base && !sparse_mem_mmap_fits(pdev, num)) {