On Tue, Apr 24, 2018 at 11:19:07AM +0200, Hans de Goede wrote:
> Kevin Shanahan reports the following repeating errors when using LPM,
> causing long delays accessing the disk:
>
> Apr 23 10:21:43 link kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr
> 0x50000 action 0x6 frozen
> Apr 23 10:21:43 link kernel: ata1: SError: { PHYRdyChg CommWake }
> Apr 23 10:21:43 link kernel: ata1.00: failed command: WRITE DMA
> Apr 23 10:21:43 link kernel: ata1.00: cmd
> ca/00:08:60:5d:cd/00:00:00:00:00/e1 tag 9 dma 4096 out
> res
> 50/01:01:01:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
> Apr 23 10:21:43 link kernel: ata1.00: status: { DRDY }
> Apr 23 10:21:43 link kernel: ata1.00: error: { AMNF }
> Apr 23 10:21:43 link kernel: ata1: hard resetting link
> Apr 23 10:21:43 link kernel: ata1: SATA link up 6.0 Gbps (SStatus 133
> SControl 300)
> Apr 23 10:21:43 link kernel: ata1.00: configured for UDMA/133
> Apr 23 10:21:43 link kernel: ata1: EH complete
>
> These go away when switching from med_power_with_dipm to medium_power.
>
> This is somewhat weird as the PM830 datasheet explicitly mentions DIPM
> being supported and the idle power-consumption is specified with DIPM
> enabled.
>
> There are many OEM customized firmware versions for the PM830, so for now
> lets assume this is firmware version specific and blacklist LPM based on
> the firmware version.
>
> Cc: Kevin Shanahan <ke...@shanahan.id.au>
> Reported-by: Kevin Shanahan <ke...@shanahan.id.au>
> Signed-off-by: Hans de Goede <hdego...@redhat.com>
Applied to libata/for-4.17-fixes.
Thanks.
--
tejun
