pci: use size stored in proc_dir_entry for proc bus files

On pci_proc_attach_device(), the size of the PCI configuration space is
stored in the proc_dir_entry as the size of the file.  Thus, the procfs
interface to PCI devices should use it instead of the device directly.
Signed-off-by: NDavid Rientjes <rientjes@google.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/pci/proc.c

@@ -60,7 +60,7 @@ proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *pp
 	 */
 
 	if (capable(CAP_SYS_ADMIN))
-		size = dev->cfg_size;
+		size = dp->size;
 	else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
 		size = 128;
 	else
@@ -133,7 +133,7 @@ proc_bus_pci_write(struct file *file, const char __user *buf, size_t nbytes, lof
 	const struct proc_dir_entry *dp = PDE(ino);
 	struct pci_dev *dev = dp->data;
 	int pos = *ppos;
-	int size = dev->cfg_size;
+	int size = dp->size;
 	int cnt;
 
 	if (pos >= size)