Re: Bug report for ahci-mvebu driver

From: marius@psihoexpert.ro
To: "Damien Le Moal" <damien.lemoal@opensource.wdc.com>
Cc: linux-ide@vger.kernel.org
Subject: Re: Bug report for ahci-mvebu driver
Date: Tue, 07 Feb 2023 18:40:01 +0000	[thread overview]
Message-ID: <6936c460663c956b5c77215eeef140d7@psihoexpert.ro> (raw)
In-Reply-To: <1e069565-a391-0f33-0714-ba9cc3792a42@opensource.wdc.com>

January 31, 2023 9:28 AM, "Damien Le Moal" <damien.lemoal@opensource.wdc.com> wrote:

> I did testing on Intel & AMD machines with different adpaters/drives/pmp that I
> have (AHCI, ASMedia and Marvell adapters). Everything was OK on my end.
> 
> The tag is for this kernel only. If backporting to 5.15 does not solve the
> issue, we will need to take that separately and redo debugging on that version.
> I would like to send the patch to Linus by the end of the week...
> 
> --
> Damien Le Moal
> Western Digital Research

I saw that the patch was applied to v5.15 too. That was probably not a good ideea. This weekend I tried to test the patch in OpenWrt kernel v5.15. It doesn't work:

--- RAID box connected ---
[ 1772.100899] ata2: SATA link down (SStatus 111 SControl 310)
[ 1772.114132] ata2: limiting SATA link speed to 1.5 Gbps
...and these two lines repeat forever. There is no "giving up".

I tried the workaround "libata.force=2:1.5Gbps". It works, but with a delay:

[ 116.705772] ata2: SATA link down (SStatus 101 SControl 300)
[ 119.175752] ata2: COMRESET failed (errno=-32)
[ 119.180133] ata2: reset failed (errno=-32), retrying in 8 secs
[ 127.205713] ata2: limiting SATA link speed to <unknown>
[ 129.475703] ata2: COMRESET failed (errno=-32)
[ 129.480084] ata2: reset failed (errno=-32), retrying in 8 secs
[ 137.445667] ata2: limiting SATA link speed to <unknown>
[ 139.715666] ata2: COMRESET failed (errno=-32)
[ 139.720052] ata2: reset failed (errno=-32), retrying in 33 secs
[ 172.645529] ata2: limiting SATA link speed to <unknown>
[ 173.585525] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 3D0)
[ 173.591831] ata2.15: Port Multiplier 1.2, 0x197b:0x0325 r193, 8 ports, feat 0xf/0x1f
[ 173.600838] ahci-mvebu f10a8000.sata: FBS is enabled
[ 173.605977] ata2.00: hard resetting link
[ 173.937078] ata2.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 173.943563] ata2.01: hard resetting link
[ 174.277073] ata2.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 174.283555] ata2.02: hard resetting link
[ 174.617075] ata2.02: SATA link down (SStatus 0 SControl 300)
[ 174.622787] ata2.03: hard resetting link
[ 174.957074] ata2.03: SATA link down (SStatus 0 SControl 300)
[ 174.962785] ata2.04: hard resetting link
[ 175.297075] ata2.04: SATA link down (SStatus 0 SControl 300)
[ 175.302784] ata2.05: hard resetting link
[ 175.637072] ata2.05: SATA link down (SStatus 0 SControl 300)
[ 175.642781] ata2.06: hard resetting link
[ 175.977071] ata2.06: SATA link down (SStatus 0 SControl 300)
[ 175.982781] ata2.07: hard resetting link
[ 176.317063] ata2.07: SATA link down (SStatus 0 SControl 300)
[ 176.322839] ata2.00: ATA-6: WDC WD50ARC-5040-VOL#01, 0100 AX, max UDMA/133
[ 176.329758] ata2.00: 976773168 sectors, multi 0: LBA48
[ 176.335595] ata2.00: configured for UDMA/133
[ 176.339944] ata2.01: ATA-6: Areca Archive, 0100 AX, max UDMA/133
[ 176.346160] ata2.01: 23437498368 sectors, multi 0: LBA48
[ 176.351830] ata2.01: configured for UDMA/133
[ 176.356303] ata2: EH complete

So probably some other commit needs backporting before this one works. Any ideea which might it be?
I will try another bisect when I have time. Any clues would help a lot.

Marius Dinu