Re: [PATCH] iSeries virtual disk

[Christoph Hellwig <hch@infradead.org>]

On Fri, Feb 27, 2004 at 02:37:17PM +0100, Christoph Hellwig wrote:
> Here's a totally untested patch to fix it up:

And a better one that makes viodasd_max_disks properly start at 0.


--- 1.1/drivers/block/viodasd.c	Fri Feb 27 06:25:15 2004
+++ edited/drivers/block/viodasd.c	Fri Feb 27 15:44:03 2004
@@ -209,7 +209,6 @@
 				(int)we.rc, we.sub_result, err->msg);
 		return -EIO;
 	}
-	viodasd_max_disk = we.max_disk;
 
 	return 0;
 }
@@ -451,10 +450,9 @@
 }
 
 /*
- * Probe a single disk and fill in the viodasd_device structure
- * for it.
+ * Probe a single disk and fill in the viodasd_device structure for it.
  */
-static void probe_disk(struct viodasd_device *d)
+static void __init probe_disk(struct viodasd_device *d)
 {
 	HvLpEvent_Rc hvrc;
 	struct viodasd_waitevent we;
@@ -483,7 +481,8 @@
 
 	if (we.rc != 0)
 		return;
-	viodasd_max_disk = we.max_disk;
+
+	viodasd_max_disk = min(we.max_disk - 1, MAX_DISKNO);
 
 	/* Send the close event to OS/400.  We DON'T expect a response */
 	hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
@@ -744,27 +743,13 @@
 	/* Initialize our request handler */
 	vio_setHandler(viomajorsubtype_blockio, handle_block_event);
 
-	viodasd_max_disk = MAX_DISKNO - 1;
-	for (i = 0; (i <= viodasd_max_disk) && (i < MAX_DISKNO); i++) {
-		/*
-		 * Note that probe_disk has side effects:
-		 *  a) it updates the size of the disk
-		 *  b) it updates viodasd_max_disk
-		 *  c) it registers the disk if it has not done so already
-		 */
+	/* probe_disk updates viodasd_max_disk */
+	for (i = 0; i < viodasd_max_disk; i++)
 		probe_disk(&viodasd_devices[i]);
-	}
-
-	if (viodasd_max_disk > (MAX_DISKNO - 1))
-		printk(VIOD_KERN_INFO
-			"Only examining the first %d of %d disks connected\n",
-			MAX_DISKNO, viodasd_max_disk + 1);
-
 	return 0;
 }
-module_init(viodasd_init);
 
-void viodasd_exit(void)
+static void __exit viodasd_exit(void)
 {
 	int i;
 	struct viodasd_device *d;
@@ -783,4 +768,5 @@
 	viopath_close(viopath_hostLp, viomajorsubtype_blockio, VIOMAXREQ + 2);
 }
 
+module_init(viodasd_init);
 module_exit(viodasd_exit);