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Date: Mon, 06 Feb 2012 09:36:58 +0800 From: Lin Ming <ming.m.lin@...el.com> To: Norbert Preining <preining@...ic.at> Cc: "Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>, linux-kernel@...r.kernel.org, jeff@...zik.org, Tejun Heo <tj@...nel.org>, "stern@...land.harvard.edu >> Alan Stern" <stern@...land.harvard.edu>, linux-ide@...r.kernel.org, Linux PM mailing list <linux-pm@...r.kernel.org>, "Rafael J. Wysocki" <rjw@...k.pl> Subject: Re: Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume, COMRESET failed On Mon, 2012-02-06 at 09:46 +0900, Norbert Preining wrote: > Hi Lin, > > > sorry for the delay, weekend I was off ... > > On Fr, 03 Feb 2012, Lin Ming wrote: > > > Confirmed. Reverted 7faa33da9b7 on top of 6c073a7ee250 made > > > the boot delay go away. dmesg from this boot attached. > > > > Dig into the code, but I can't find where the problem is. > > > > Anyway, does below DEBUG patch help? > > Let's always stop the engine during hard reset. > > If you meant: > "Try that patch on top of HEAD *without* reverting 7faa33da9b7?" > then I can report that it does NOT help. With *only* this patch I still > get 10sec delay, and otherwise nothing changes. Does below help? diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index a72bfd0..33f7333 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -746,6 +746,9 @@ static void ahci_start_port(struct ata_port *ap) /* enable FIS reception */ ahci_start_fis_rx(ap); + /* enable DMA */ + ahci_start_engine(ap); + /* turn on LEDs */ if (ap->flags & ATA_FLAG_EM) { ata_for_each_link(link, ap, EDGE) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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