PCI: Use res_to_dev_res() in reassign_resources_sorted()

[ Upstream commit 4bee4fc ]

reassign_resources_sorted() contains a search loop for a particular
resource in the head list. res_to_dev_res() already implements the same
search so use it instead.

Drop unused found_match and dev_res variables.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20251219174036.16738-9-ilpo.jarvinen@linux.intel.com
Stable-dep-of: 1ee4716 ("PCI: Fix premature removal from realloc_head list during resource assignment")
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: ij-intel

drivers/pci/setup-bus.c

@@ -417,16 +417,13 @@ static void reassign_resources_sorted(struct list_head *realloc_head,
 				      struct list_head *head)
 {
 	struct pci_dev_resource *add_res, *tmp;
-	struct pci_dev_resource *dev_res;
 	struct pci_dev *dev;
 	struct resource *res;
 	const char *res_name;
 	resource_size_t add_size, align;
 	int idx;
 
 	list_for_each_entry_safe(add_res, tmp, realloc_head, list) {
-		bool found_match = false;
-
 		res = add_res->res;
 		dev = add_res->dev;
 		idx = pci_resource_num(dev, res);
@@ -440,13 +437,7 @@ static void reassign_resources_sorted(struct list_head *realloc_head,
 			goto out;
 
 		/* Skip this resource if not found in head list */
-		list_for_each_entry(dev_res, head, list) {
-			if (dev_res->res == res) {
-				found_match = true;
-				break;
-			}
-		}
-		if (!found_match) /* Just skip */
+		if (!res_to_dev_res(head, res))
 			continue;
 
 		res_name = pci_resource_name(dev, idx);