rpi3b+: ethernet not working
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned | ||
linux-raspi2 (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
Impact:
Since the release of Ubuntu-
The problem lies in commit 72eff2505735 ("lan78xx: Connect phy early"), that was backported into Bionic/master (and then percolated down into Bionic/raspi2):
" Commit 92571a1aae40 ("lan78xx: Connect phy early") moves the PHY
initialisation into lan78xx_probe, but lan78xx_open subsequently calls
lan78xx_reset. As well as forcing a second round of link negotiation,
this reset frequently prevents the phy interrupt from being generated
(even though the link is up), rendering the interface unusable.
Fix this issue by removing the lan78xx_reset call from lan78xx_open.
"
Fix:
Apply the attached patch and recompile
How to test:
Boot a patched kernel and checks if the ethernet port is working
Regression potential:
None, the attached patch is a fix for the aforementioned patch, and fixes exactly this issue - it's upstream already and was backported into gregkh's stable branches 4.17+.
CVE References
tags: | added: patch |
Changed in linux (Ubuntu Bionic): | |
status: | Incomplete → Fix Committed |
tags: |
added: verification-done-bionic removed: verification-needed-bionic |
Changed in linux-raspi2 (Ubuntu): | |
status: | New → Incomplete |
tags: | added: cscc |
Changed in linux (Ubuntu): | |
status: | Incomplete → Fix Released |
Changed in linux-raspi2 (Ubuntu): | |
status: | Incomplete → Fix Released |
@Paolo, since the patch is targeted at bionic/master I added the respective task and nomination. I let you handle how you want to set status of linux-raspi2 tasks.