x86/pci: Simplify is_mmconf_reserved() messages

is_mmconf_reserved() takes a "with_e820" parameter that only determines the
message logged if it finds the MMCONFIG region is reserved.  Pass the
message directly, which will simplify a future patch that adds a new way of
looking for that reservation.  No functional change intended.

Link: https://lore.kernel.org/r/20230110180243.1590045-2-helgaas@kernel.org
Tested-by: Tony Luck <tony.luck@intel.com>
Tested-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>

Author: bjorn-helgaas

arch/x86/pci/mmconfig-shared.c

@@ -446,13 +446,12 @@ typedef bool (*check_reserved_t)(u64 start, u64 end, enum e820_type type);
 
 static bool __ref is_mmconf_reserved(check_reserved_t is_reserved,
 				     struct pci_mmcfg_region *cfg,
-				     struct device *dev, int with_e820)
+				     struct device *dev, const char *method)
 {
 	u64 addr = cfg->res.start;
 	u64 size = resource_size(&cfg->res);
 	u64 old_size = size;
 	int num_buses;
-	char *method = with_e820 ? "E820" : "ACPI motherboard resources";
 
 	while (!is_reserved(addr, addr + size, E820_TYPE_RESERVED)) {
 		size >>= 1;
@@ -464,10 +463,10 @@ static bool __ref is_mmconf_reserved(check_reserved_t is_reserved,
 		return false;
 
 	if (dev)
-		dev_info(dev, "MMCONFIG at %pR reserved in %s\n",
+		dev_info(dev, "MMCONFIG at %pR reserved as %s\n",
 			 &cfg->res, method);
 	else
-		pr_info(PREFIX "MMCONFIG at %pR reserved in %s\n",
+		pr_info(PREFIX "MMCONFIG at %pR reserved as %s\n",
 		       &cfg->res, method);
 
 	if (old_size != size) {
@@ -500,7 +499,8 @@ static bool __ref
 pci_mmcfg_check_reserved(struct device *dev, struct pci_mmcfg_region *cfg, int early)
 {
 	if (!early && !acpi_disabled) {
-		if (is_mmconf_reserved(is_acpi_reserved, cfg, dev, 0))
+		if (is_mmconf_reserved(is_acpi_reserved, cfg, dev,
+				       "ACPI motherboard resource"))
 			return true;
 
 		if (dev)
@@ -527,7 +527,8 @@ pci_mmcfg_check_reserved(struct device *dev, struct pci_mmcfg_region *cfg, int e
 	/* Don't try to do this check unless configuration
 	   type 1 is available. how about type 2 ?*/
 	if (raw_pci_ops)
-		return is_mmconf_reserved(e820__mapped_all, cfg, dev, 1);
+		return is_mmconf_reserved(e820__mapped_all, cfg, dev,
+					  "E820 entry");
 
 	return false;
 }