[lkml]   [2006]   [Feb]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] Fixup ahci suspend / resume
On Tue, Feb 28 2006, Jeff Garzik wrote:
> Hannes Reinecke wrote:
> >From: Hannes Reinecke <>
> >Subject: AHCI suspend / resume fixes.
> >
> >The current ahci driver has the problem that it doesn't resume properly.
> >Or rather, that resuming is unstable.
> >Reason being is that AHCI has 4 registers containing the DMA address it
> >should write things to. Of course there is no guarantee that Linux has
> >assigned the same address to the DMA area across reboots.
> >So we should better re-initialize those registers after resume.
> >
> >The patch also improves the port_start / port_stop routines to be more
> >closely modelled after the spec. This also avoids a nasty msleep(500)
> >during initialisation.
> >
> >Signed-off-by: Hannes Reinecke <>
> Seems sane at first glance, but can you please regenerate this against
> libata-dev.git#upstream ?
> Upstream 2.6.x doesn't care at all about suspend/resume, and AHCI has
> seen several modifications in #upstream that are waiting for 2.6.17.

Upstream 2.6.x certainly _does_ care about suspend/resume! To me, this
patch seems simple enough to be included. It's little more than
splitting the register init out form the port_stop/start functions and
calling them on resume/suspend appropriately.

Jens Axboe

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2006-02-28 16:22    [W:0.070 / U:8.052 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site