PCI/sysfs: Calculate bin_attribute size through bin_size()

Stop abusing the is_bin_visible() callback to calculate the attribute
size. Instead use the new, dedicated bin_size() one.

Signed-off-by: Thomas Weißschuh <[email protected]>
Acked-by: Krzysztof Wilczyński <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: t-8ch

drivers/pci/pci-sysfs.c

@@ -818,21 +818,20 @@ static struct bin_attribute *pci_dev_config_attrs[] = {
 	NULL,
 };
 
-static umode_t pci_dev_config_attr_is_visible(struct kobject *kobj,
-					      struct bin_attribute *a, int n)
+static size_t pci_dev_config_attr_bin_size(struct kobject *kobj,
+					   const struct bin_attribute *a,
+					   int n)
 {
 	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
 
-	a->size = PCI_CFG_SPACE_SIZE;
 	if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
-		a->size = PCI_CFG_SPACE_EXP_SIZE;
-
-	return a->attr.mode;
+		return PCI_CFG_SPACE_EXP_SIZE;
+	return PCI_CFG_SPACE_SIZE;
 }
 
 static const struct attribute_group pci_dev_config_attr_group = {
 	.bin_attrs = pci_dev_config_attrs,
-	.is_bin_visible = pci_dev_config_attr_is_visible,
+	.bin_size = pci_dev_config_attr_bin_size,
 };
 
 /*
@@ -1330,21 +1329,26 @@ static umode_t pci_dev_rom_attr_is_visible(struct kobject *kobj,
 					   struct bin_attribute *a, int n)
 {
 	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
-	size_t rom_size;
 
 	/* If the device has a ROM, try to expose it in sysfs. */
-	rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
-	if (!rom_size)
+	if (!pci_resource_end(pdev, PCI_ROM_RESOURCE))
 		return 0;
 
-	a->size = rom_size;
-
 	return a->attr.mode;
 }
 
+static size_t pci_dev_rom_attr_bin_size(struct kobject *kobj,
+					const struct bin_attribute *a, int n)
+{
+	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
+
+	return pci_resource_len(pdev, PCI_ROM_RESOURCE);
+}
+
 static const struct attribute_group pci_dev_rom_attr_group = {
 	.bin_attrs = pci_dev_rom_attrs,
 	.is_bin_visible = pci_dev_rom_attr_is_visible,
+	.bin_size = pci_dev_rom_attr_bin_size,
 };
 
 static ssize_t reset_store(struct device *dev, struct device_attribute *attr,