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 <kevin@xxxxxxxxxxxxxx> > Reported-by: Kevin Shanahan <kevin@xxxxxxxxxxxxxx> > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Applied to libata/for-4.17-fixes. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html