Re: [RFC 3/3] libata: don't perform HW activity in devres

[Tejun Heo]

On Thu, Oct 25, 2012 at 09:56:01AM -0700, Brian Norris wrote:
> devres functions are intended for simplified cleanup of memory and other
> software resources on device exit, not for hardware shutdown sequences.
> In addition, inducing hardware activity at device removal hamstrings
> some drivers (particularly ahci_platform) so that they cannot totally
> power off their hardware before removal, as devres cleanup occurs after
> the driver's exit() sequence.
> 
> More concretely, I experience the following bus error when using rmmod
> to remove (and power off) the SATA block on my SoC:

Shouldn't poweroff happen from ->port/host_stop()?

Thanks.

-- 
tejun
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