s390/pci: remove per device debug attribute

The per-pci-device 'debug' attribute is ill defined. For each device
it prints the same information, the adapter interrupt bit vector for
irq numbers 0 & 1, the start of the global interrupt summary vector
and the global irq retries counter. Just remove the attribute and
the associated code.

Signed-off-by: Martin Schwidefsky <[e-mail]>

arch/s390/include/asm/pci.h

···
 
 	struct dentry	*debugfs_dev;
 	struct dentry	*debugfs_perf;
-	struct dentry	*debugfs_debug;
 };
 
 struct pci_hp_callback_ops {

arch/s390/pci/pci.c

···
 /* Adapter local summary indicator */
 static u8 *zpci_irq_si;
 
-static atomic_t irq_retries = ATOMIC_INIT(0);
-
 /* I/O Map */
 static DEFINE_SPINLOCK(zpci_iomap_lock);
 static DECLARE_BITMAP(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
···
 	max = aisb_max;
 	sbit = find_first_bit_left(bucket->aisb, max);
 	if (sbit != max) {
-		atomic_inc(&irq_retries);
 		rescan++;
 		goto scan;
 	}
···
 	s390_unregister_adapter_interrupt(zpci_irq_si, PCI_ISC);
 	isc_unregister(PCI_ISC);
 	kfree(bucket);
-}
-
-void zpci_debug_info(struct zpci_dev *zdev, struct seq_file *m)
-{
-	if (!zdev)
-		return;
-
-	seq_printf(m, "global irq retries: %u\n", atomic_read(&irq_retries));
-	seq_printf(m, "aibv[0]:%016lx  aibv[1]:%016lx  aisb:%016lx\n",
-		   get_imap(0)->aibv, get_imap(1)->aibv, *bucket->aisb);
 }
 
 static struct resource *zpci_alloc_bus_resource(unsigned long start, unsigned long size,

arch/s390/pci/pci_debug.c

···
 	.release = single_release,
 };
 
-static int pci_debug_show(struct seq_file *m, void *v)
-{
-	struct zpci_dev *zdev = m->private;
-
-	zpci_debug_info(zdev, m);
-	return 0;
-}
-
-static int pci_debug_seq_open(struct inode *inode, struct file *filp)
-{
-	return single_open(filp, pci_debug_show,
-			   file_inode(filp)->i_private);
-}
-
-static const struct file_operations debugfs_pci_debug_fops = {
-	.open	 = pci_debug_seq_open,
-	.read	 = seq_read,
-	.llseek  = seq_lseek,
-	.release = single_release,
-};
-
 void zpci_debug_init_device(struct zpci_dev *zdev)
 {
 	zdev->debugfs_dev = debugfs_create_dir(dev_name(&zdev->pdev->dev),
···
 				&debugfs_pci_perf_fops);
 	if (IS_ERR(zdev->debugfs_perf))
 		zdev->debugfs_perf = NULL;
-
-	zdev->debugfs_debug = debugfs_create_file("debug",
-				S_IFREG | S_IRUGO | S_IWUSR,
-				zdev->debugfs_dev, zdev,
-				&debugfs_pci_debug_fops);
-	if (IS_ERR(zdev->debugfs_debug))
-		zdev->debugfs_debug = NULL;
 }
 
 void zpci_debug_exit_device(struct zpci_dev *zdev)
 {
 	debugfs_remove(zdev->debugfs_perf);
-	debugfs_remove(zdev->debugfs_debug);
 	debugfs_remove(zdev->debugfs_dev);
 }