Re: ide errors in 7-rc1-mm1 and later

[Ed Tomlinson]

On June 4, 2004 05:42 am, Jens Axboe wrote:
> On Thu, Jun 03 2004, Andrew Morton wrote:
> > Ed Tomlinson <edt@xxxxxx> wrote:
> > >
> > > Hi,
> > > 
> > > I am still getting these ide errors with 7-rc2-mm2.  I  get the errors even
> > > if I mount with barrier=0 (or just defaults).  It would seem that something is 
> > > sending my drive commands it does not understand...  
> > > 
> > > May 27 18:18:05 bert kernel: hda: drive_cmd: status=0x51 { DriveReady SeekComplete Error }
> > > May 27 18:18:05 bert kernel: hda: drive_cmd: error=0x04 { DriveStatusError }
> > > 
> > > How can we find out what is wrong?
> > > 
> > > This does not seem to be an error that corrupts the fs, it just slows things 
> > > down when it hits a group of these.  Note that they keep poping up - they
> > > do stop (I still get them hours after booting).
> > 
> > Jens, do we still have the command bytes available when this error hits?
> 
> It's not trivial, here's a hack that should dump the offending opcode
> though.

Hi Jens,

I applied the patch below and booted into the new kernel (the boot message showed the 
new compile time).  The error messages remained the same - no extra info.  Is there 
another place that prints this (or (!rq) is true)?

Ideas?
Ed
 
> --- linux-2.6.7-rc2-mm2/drivers/ide/ide.c~	2004-06-04 11:32:49.286777112 +0200
> +++ linux-2.6.7-rc2-mm2/drivers/ide/ide.c	2004-06-04 11:41:47.338870307 +0200
> @@ -438,6 +438,30 @@
>  #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;
>  }
> 
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