Public bug reported:
[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
[Regression Risk]
Impact is limited to drivers built on top of libsas.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
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https://bugs.launchpad.net/bugs/1830435
Title:
phy linkrate persists after deactivation
Status in linux package in Ubuntu:
In Progress
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
[Regression Risk]
Impact is limited to drivers built on top of libsas.
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