Re: Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume, COMRESET failed
From: Lin Ming <hidden>
Date: 2012-02-06 01:37:02
Also in:
lkml
Subsystem:
libata subsystem (serial and parallel ata drivers), the rest · Maintainers:
Damien Le Moal, Niklas Cassel, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2012-02-08 · Re: Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume, COMRESET failed · <hidden>
- 2012-02-03 · Re: Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume, COMRESET failed · Norbert Preining <hidden>
- 2012-02-03 · Re: Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume, COMRESET failed · Norbert Preining <hidden>
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:quoted
quoted
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) {