From: Jens Axboe <axboe@suse.de>

It's not trivial, here's a hack that should dump the offending opcode
though.

Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 25-akpm/drivers/ide/ide.c |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+)

diff -puN drivers/ide/ide.c~ide-print-failed-opcode drivers/ide/ide.c
--- 25/drivers/ide/ide.c~ide-print-failed-opcode	2004-06-06 23:14:11.709818160 -0700
+++ 25-akpm/drivers/ide/ide.c	2004-06-06 23:14:11.714817400 -0700
@@ -437,6 +437,30 @@ u8 ide_dump_status (ide_drive_t *drive, 
 #endif	/* FANCY_STATUS_DUMPS */
 		printk("\n");
 	}
+	{
+		struct request *rq;
+		int opcode = 0x100;
+
+		spin_lock(&ide_lock);
+		rq = HWGROUP(drive)->rq;
+		spin_unlock(&ide_lock);
+		if (!rq)
+			goto out;
+		if (rq->flags & (REQ_DRIVE_CMD | REQ_DRIVE_TASK)) {
+			char *args = rq->buffer;
+			if (args)
+				opcode = args[0];
+		} else if (rq->flags & REQ_DRIVE_TASKFILE) {
+			ide_task_t *args = rq->special;
+			if (args) {
+				task_struct_t *tf = (task_struct_t *) args->tfRegister;
+				opcode = tf->command;
+			}
+		}
+
+		printk("ide: failed opcode was %x\n", opcode);
+	}
+out:
 	local_irq_restore(flags);
 	return err;
 }
_