alpha: pci-sysfs: fix all kernel-doc warnings

Fix all kernel-doc warnings in arch/alpha/kernel/pci-sysfs.c:

  arch/alpha/kernel/pci-sysfs.c:67: warning: No description found for return value of 'pci_mmap_resource'
  arch/alpha/kernel/pci-sysfs.c:115: warning: Function parameter or member 'pdev' not described in 'pci_remove_resource_files'
  arch/alpha/kernel/pci-sysfs.c:115: warning: Excess function parameter 'dev' description in 'pci_remove_resource_files'
  arch/alpha/kernel/pci-sysfs.c:230: warning: Function parameter or member 'pdev' not described in 'pci_create_resource_files'
  arch/alpha/kernel/pci-sysfs.c:230: warning: Excess function parameter 'dev' description in 'pci_create_resource_files'
  arch/alpha/kernel/pci-sysfs.c:232: warning: No description found for return value of 'pci_create_resource_files'
  arch/alpha/kernel/pci-sysfs.c:305: warning: Function parameter or member 'bus' not described in 'pci_adjust_legacy_attr'
  arch/alpha/kernel/pci-sysfs.c:305: warning: Excess function parameter 'b' description in 'pci_adjust_legacy_attr'

Link: https://lkml.kernel.org/r/20210808185249.31442-1-rdunlap@infradead.orgSigned-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/alpha/kernel/pci-sysfs.c

@@ -60,6 +60,8 @@ static int __pci_mmap_fits(struct pci_dev *pdev, int num,
  * @sparse: address space type
  *
  * Use the bus mapping routines to map a PCI resource into userspace.
+ *
+ * Return: %0 on success, negative error code otherwise
  */
 static int pci_mmap_resource(struct kobject *kobj,
 			     struct bin_attribute *attr,
@@ -106,7 +108,7 @@ static int pci_mmap_resource_dense(struct file *filp, struct kobject *kobj,
 
 /**
  * pci_remove_resource_files - cleanup resource files
- * @dev: dev to cleanup
+ * @pdev: pci_dev to cleanup
  *
  * If we created resource files for @dev, remove them from sysfs and
  * free their resources.
@@ -221,10 +223,12 @@ static int pci_create_attr(struct pci_dev *pdev, int num)
 }
 
 /**
- * pci_create_resource_files - create resource files in sysfs for @dev
- * @dev: dev in question
+ * pci_create_resource_files - create resource files in sysfs for @pdev
+ * @pdev: pci_dev in question
  *
  * Walk the resources in @dev creating files for each resource available.
+ *
+ * Return: %0 on success, or negative error code
  */
 int pci_create_resource_files(struct pci_dev *pdev)
 {
@@ -296,7 +300,7 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma,
 
 /**
  * pci_adjust_legacy_attr - adjustment of legacy file attributes
- * @b: bus to create files under
+ * @bus: bus to create files under
  * @mmap_type: I/O port or memory
  *
  * Adjust file name and size for sparse mappings.