** Also affects: linux (Ubuntu Artful)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1724117
Title:
thunderx2 ahci errata workaround needs additional delays
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Artful:
New
Bug description:
[Impact]
Early ThunderX silicon may hang when initializing the SATA controller.
[Test Case]
This was found in a reboot loop.
The latest ThunderX2 firmware (3.1) enables hardware error interrupts and
when the reset fix fails, we get a hang with the print:
[ 14.839308] sd 1:0:0:0: [sdb] 468862128 512-byte logical blocks: (240
GB/224 GiB)
[ 14.846796] sd 1:0:0:0: [sdb] 4096-byte physical blocks
[ 14.852036] sd 1:0:0:0: [sdb] Write Protect is off
[ 14.856843] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[ 14.866022] ata2.00: Enabling discard_zeroes_data
*** NBU BAR Error 0x1e25c ***
AddrLo 0x1d80180 AddrHi 0x0
[Regression Risk]
The fix is only compiled in on arm64, and only activated at runtime on this
specific revision of silicon, so regression risk will be limited to a single
platform that is only being distributed for development purposes.
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