Public bug reported:
[Impact]
When I210 device is runtime suspended, trying to read speed or duplex from
sysfs causes an error:
[ 385.991957] igb 0000:03:00.0 enp3s0: PCIe link lost
[Fix]
Only try to read the device register when it's not runtime suspended.
[Test]
Without the fix:
$ cat /sys/class/net/enp3s0/speed
1000
With the fix:
$ cat /sys/class/net/enp3s0/speed
-1
-1 means "unknown speed", which is the correct status when device is
runtime suspend.
[Regression Potential]
Low. It's a trivial fix which limits to one driver.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-5.6 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-osp1 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: Won't Fix
** Affects: linux-oem-5.6 (Ubuntu Bionic)
Importance: Undecided
Status: Won't Fix
** Affects: linux-oem-osp1 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Affects: linux-oem-5.6 (Ubuntu Focal)
Importance: Undecided
Status: New
** Affects: linux-oem-osp1 (Ubuntu Focal)
Importance: Undecided
Status: Won't Fix
** Tags: oem-priority originate-from-1857680 somerville
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-oem-osp1 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.6 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-oem-5.6 (Ubuntu Bionic)
Status: New => Won't Fix
** Changed in: linux-oem-osp1 (Ubuntu Focal)
Status: New => Won't Fix
** Changed in: linux (Ubuntu Bionic)
Status: New => Won't Fix
** Tags added: oem-priority originate-from-1857680 somerville
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https://bugs.launchpad.net/bugs/1880656
Title:
Fix incorrect speed/duplex when I210 device is runtime suspended
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