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ata: libata-pmp: add JMicron JMS562 quirk

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JMicron JMS562, as used in QNAP QDA-A2AR RAID1 adapters, may
keep the exported ATA device not ready while the array is rebuilding.

In this state, libata may repeatedly try to softreset and classify
the fan-out link.  On the affected adapter, this can time out, make
PMP/SCR access fail, and eventually disable the fan-out link before
the RAID volume is exported.

A failing boot shows the fan-out link failing SRST, PMP access
timing out, SCR read failing, and the link being disabled:

  ata4.00: softreset failed (device not ready)
  ata4.15: qc timeout after 3000 msecs (cmd 0xe4)
  ata4.00: failed to read SCR 0 (Emask=0x4)
  ata4.00: failed to recover link after 3 tries, disabling

After that, the root filesystem on the exported RAID volume cannot
be found.

Add JMS562 to the existing JMicron PMP quirk that disables LPM,
avoids softreset on fan-out links, and assumes an ATA device.  This
prevents libata from dropping the exported RAID volume during rebuild
recovery.

Signed-off-by: Xu Rao <raoxu@uniontech.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
This commit is contained in:
Xu Rao 2026-06-10 13:28:35 +08:00 committed by Niklas Cassel
parent 0a77385b10
commit c62aff1174
1 changed files with 6 additions and 1 deletions
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7
drivers/ata/libata-pmp.c
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@ -457,8 +457,13 @@ static void sata_pmp_quirks(struct ata_port *ap)
* otherwise. Don't try hard to recover it.
*/
ap->pmp_link[ap->nr_pmp_links - 1].flags |= ATA_LFLAG_NO_RETRY;
} else if (vendor == 0x197b && (devid == 0x2352 || devid == 0x0325)) {
} else if (vendor == 0x197b &&
(devid == 0x0562 || devid == 0x2352 || devid == 0x0325)) {
/*
* 0x0562: JMicron JMS562, as used in QNAP QDA-A2AR RAID1
* adapters. The exported device may stay not ready
* while the array is rebuilding, and SRST/classify can
* time out before the RAID volume is exported.
* 0x2352: found in Thermaltake BlackX Duet, jmicron JMB350?
* 0x0325: jmicron JMB394.
*/