Re: [mmotm 2009-04-30] ata: failed to IDENTIFY

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Hello,

The warning message seems suspicious.  I'll look into it.

Wu Fengguang wrote:
...
> [ 5986.864611] ata1.00: qc timeout (cmd 0xec)
> [ 5987.153668] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
> [ 5987.159861] ata1.00: revalidation failed (errno=-5)
> [ 5987.164854] ata1: hard resetting link
> [ 5987.500647] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> [ 5997.508508] ata1.00: qc timeout (cmd 0xec)
> [ 5997.512720] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
> [ 5997.518913] ata1.00: revalidation failed (errno=-5)
> [ 5997.523893] ata1: limiting SATA link speed to 1.5 Gbps
> [ 5997.529149] ata1: hard resetting link
> [ 5997.860516] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
> [ 6027.868126] ata1.00: qc timeout (cmd 0xec)
> [ 6027.872339] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
> [ 6027.878530] ata1.00: revalidation failed (errno=-5)
> [ 6027.883507] ata1.00: disabled
> [ 6027.886603] ata1: hard resetting link
> [ 6028.220134] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
> [ 6028.226450] ata1: EH complete
> [ 6028.229748] sd 0:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
> [ 6028.237583] Restarting system.
> [ 6028.240745] machine restart

But the above failures seem to indicate that IRQ delivery went out the
window during shutdown before ATA shuts down properly.  I don't think
this is something caused by libata proper.  Would it possible for you
to bisect the problem?

Thanks.

-- 
tejun
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