Ubuntu 19.10 (Eoan Ermine) has reached end of life, so this bug will not
be fixed for that specific release.
** Changed in: linux (Ubuntu Eoan)
Status: In Progress => Won't Fix
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https://bugs.launchpad.net/bugs/1830435
Title:
libsas: old linkrate advertised after phy disabled
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Disco:
Fix Released
Status in linux source package in Eoan:
Won't Fix
Bug description:
[Impact]
sysfs continues to expose a valid phy linkrate even after the phy has been
disabled.
[Test Case]
Using hisi_sas, a libsas-based driver:
(initramfs) cd /sys/class/sas_phy/phy-0\:0\:20
(initramfs) cat negotiated_linkrate
12.0 Gbit
(initramfs) echo 0 > enable
[ 59.172411] hisi_sas_v3_hw 0000:74:02.0: phydown: phy0 phy_state=0xfe
[ 59.178851] hisi_sas_v3_hw 0000:74:02.0: erroneous completion iptt=4028
task=00000000bb3ab63f dev id=1 CQ hdr: 0x1103 0x10fbc 0x0 0x20000 Error info:
0x0 0x4000000 0x0 0x0
[ 59.194139] sas: smp_execute_task_sg: task to dev 500e004aaaaaaa1f
response: 0x0 status 0x2
(initramfs) cat negotiated_linkrate
12.0 Gbit
(Note to self: d06-1 has the setup to reproduce this)
[Fix]
d8649fc1c5e40 scsi: libsas: Do discovery on empty PHY to update PHY info
085f104a83d56 scsi: libsas: Inject revalidate event for root port event
[Regression Risk]
Impact is limited to drivers built on top of libsas.
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