PATCH: fixup incomplete ident blocks on ITE raid volumes

[Alan Cox <alan@redhat.com>]

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.8-rc3/drivers/ide/ide-probe.c linux-2.6.8-rc3/drivers/ide/ide-probe.c
--- linux.vanilla-2.6.8-rc3/drivers/ide/ide-probe.c	2004-08-09 15:51:00.000000000 +0100
+++ linux-2.6.8-rc3/drivers/ide/ide-probe.c	2004-08-14 21:03:03.000000000 +0100
@@ -542,7 +542,51 @@
 }
 
 /**
- *	probe_for_drives	-	upper level drive probe
+ *	ident_quirks	-	drive ident mangler
+ *	@drive: drive to check
+ *
+ *	Take the returned ident block for the drive and see if it
+ *	is one of the broken ones. We still broken ident fixups in
+ *	multiple places, we should migrate some of the others here.
+ */
+static void ident_quirks(ide_drive_t *drive)
+{
+	struct hd_driveid *id = drive->id;
+	u16 *idbits = (u16 *)id;
+	
+	if(strstr(id->model, "Integrated Technology Express"))
+	{
+		/* IT821x raid volume with bogus ident block */
+		if(id->lba_capacity >= 0x200000)
+		{
+			id->sectors = 63;
+			id->heads = 255;
+		}
+		else
+		{
+			id->sectors = 32;
+			id->heads = 64;
+		}
+		id->cyls = 1 + id->lba_capacity_2 / (id->heads * id->sectors);
+		/* LBA28 is ok, DMA is ok, UDMA data is valid */
+		id->capability |= 3;
+		id->field_valid |= 7;
+		/* LBA48 is ok */
+		id->command_set_2 |= 0x0400;
+		id->cfs_enable_2 |= 0x0400;
+		/* Flush is ok */
+		id->cfs_enable_2 |= 0x3000;
+		printk(KERN_WARNING "%s: IT8212 %sRAID %d volume",
+			drive->name,
+			idbits[147] ? "Bootable ":"",
+			idbits[129]);
+		if(idbits[129] != 1)
+			printk("(%dK stripe)", idbits[146]);
+		printk(".\n");
+	}		
+}
+/**
+ *	probe_for_drive	-	upper level drive probe
  *	@drive: drive to probe for
  *
  *	probe_for_drive() tests for existence of a given drive using do_probe()
@@ -553,7 +597,7 @@
  *			   still be 0)
  */
  
-static inline u8 probe_for_drive (ide_drive_t *drive)
+static u8 probe_for_drive(ide_drive_t *drive)
 {
 	/*
 	 *	In order to keep things simple we have an id
@@ -602,6 +646,7 @@
 				drive->present = 0;
 			}
 		}
+		ident_quirks(drive);
 		/* drive was found */
 	}
 	if(!drive->present)


Signed-off-by: Alan Cox