PCI: Clean up accessor macro formatting

Clean up formatting of PCI accessor macros:

  - Put return statements on own line

  - Add a few empty lines for better readability

  - Align macro continuation backslashes

  - Correct function call argument indentation level

  - Reorder variable declarations to order of use

  - Drop unnecessary variable initialization

Link: https://lore.kernel.org/r/20240429094707.2529-2-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
[bhelgaas: drop initialization, tweak variables to order of use]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

Author: ij-intel

drivers/pci/access.c

@@ -36,30 +36,38 @@ DEFINE_RAW_SPINLOCK(pci_lock);
 int noinline pci_bus_read_config_##size \
 	(struct pci_bus *bus, unsigned int devfn, int pos, type *value)	\
 {									\
-	int res;							\
 	unsigned long flags;						\
 	u32 data = 0;							\
-	if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER;	\
+	int res;							\
+									\
+	if (PCI_##size##_BAD)						\
+		return PCIBIOS_BAD_REGISTER_NUMBER;			\
+									\
 	pci_lock_config(flags);						\
 	res = bus->ops->read(bus, devfn, pos, len, &data);		\
 	if (res)							\
 		PCI_SET_ERROR_RESPONSE(value);				\
 	else								\
 		*value = (type)data;					\
 	pci_unlock_config(flags);					\
+									\
 	return res;							\
 }
 
 #define PCI_OP_WRITE(size, type, len) \
 int noinline pci_bus_write_config_##size \
 	(struct pci_bus *bus, unsigned int devfn, int pos, type value)	\
 {									\
-	int res;							\
 	unsigned long flags;						\
-	if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER;	\
+	int res;							\
+									\
+	if (PCI_##size##_BAD)						\
+		return PCIBIOS_BAD_REGISTER_NUMBER;			\
+									\
 	pci_lock_config(flags);						\
 	res = bus->ops->write(bus, devfn, pos, len, value);		\
 	pci_unlock_config(flags);					\
+									\
 	return res;							\
 }
 
@@ -216,24 +224,27 @@ static noinline void pci_wait_cfg(struct pci_dev *dev)
 }
 
 /* Returns 0 on success, negative values indicate error. */
-#define PCI_USER_READ_CONFIG(size, type)					\
+#define PCI_USER_READ_CONFIG(size, type)				\
 int pci_user_read_config_##size						\
 	(struct pci_dev *dev, int pos, type *val)			\
 {									\
-	int ret = PCIBIOS_SUCCESSFUL;					\
 	u32 data = -1;							\
+	int ret;							\
+									\
 	if (PCI_##size##_BAD)						\
 		return -EINVAL;						\
-	raw_spin_lock_irq(&pci_lock);				\
+									\
+	raw_spin_lock_irq(&pci_lock);					\
 	if (unlikely(dev->block_cfg_access))				\
 		pci_wait_cfg(dev);					\
 	ret = dev->bus->ops->read(dev->bus, dev->devfn,			\
-					pos, sizeof(type), &data);	\
-	raw_spin_unlock_irq(&pci_lock);				\
+				  pos, sizeof(type), &data);		\
+	raw_spin_unlock_irq(&pci_lock);					\
 	if (ret)							\
 		PCI_SET_ERROR_RESPONSE(val);				\
 	else								\
 		*val = (type)data;					\
+									\
 	return pcibios_err_to_errno(ret);				\
 }									\
 EXPORT_SYMBOL_GPL(pci_user_read_config_##size);
@@ -243,15 +254,18 @@ EXPORT_SYMBOL_GPL(pci_user_read_config_##size);
 int pci_user_write_config_##size					\
 	(struct pci_dev *dev, int pos, type val)			\
 {									\
-	int ret = PCIBIOS_SUCCESSFUL;					\
+	int ret;							\
+									\
 	if (PCI_##size##_BAD)						\
 		return -EINVAL;						\
-	raw_spin_lock_irq(&pci_lock);				\
+									\
+	raw_spin_lock_irq(&pci_lock);					\
 	if (unlikely(dev->block_cfg_access))				\
 		pci_wait_cfg(dev);					\
 	ret = dev->bus->ops->write(dev->bus, dev->devfn,		\
-					pos, sizeof(type), val);	\
-	raw_spin_unlock_irq(&pci_lock);				\
+				   pos, sizeof(type), val);		\
+	raw_spin_unlock_irq(&pci_lock);					\
+									\
 	return pcibios_err_to_errno(ret);				\
 }									\
 EXPORT_SYMBOL_GPL(pci_user_write_config_##size);