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Date:	Fri, 04 Jul 2008 17:10:32 +0900
From:	Tejun Heo <>
To:	Zhang Rui <>
CC:	linux-pm <>,
	linux-kernel <>,
	"Rafael J. Wysocki" <>
Subject: Re: [RFC PATCH] AHCI: speed up resume

Zhang Rui wrote:
> From: Zhang Rui <>
> During resume, sleep 1 second to wait for the HBA reset
> to finish is a waste of time.
> According to the AHCI 1.2 spec,
> We should poll the HOST_CTL register,
> and return error if the host reset is not
> finished within 1 second.
> Test results show that the HBA reset can be done quickly(in usecs).
> And this patch may save nearly 1 second during resume.
> Signed-off-by: Zhang Rui <>

Acked-by: Tejun Heo <>

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