Public bug reported:
[Impact]
Pericom EHCI/OHCI controller cannot detect USB hotplug after using MSI.
[Fix]
Disable MSI and fallback to INTx.
[Test]
Hotplug any USB device and nothing gets detected.
With the fix applied the issue is gone.
[Where problems could occur]
Nothing wrong can happen. It was already using INTx before 306c54d0edb6
("usb: hcd: Try MSI interrupts on PCI devices"), and now it goes back to
use INTx again.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: Won't Fix
** Affects: linux-oem-5.10 (Ubuntu Focal)
Importance: High
Status: Confirmed
** Tags: oem-priority originate-from-1905926 somerville
** Package changed: linux (Ubuntu) => linux-oem-5.10 (Ubuntu)
** Also affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux-oem-5.10 (Ubuntu)
Status: New => Won't Fix
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided => High
** Tags added: oem-priority originate-from-1905926 somerville
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https://bugs.launchpad.net/bugs/1906839
Title:
Use INTx for Pericom USB controllers
Status in HWE Next:
New
Status in linux-oem-5.10 package in Ubuntu:
Won't Fix
Status in linux-oem-5.10 source package in Focal:
Confirmed
Bug description:
[Impact]
Pericom EHCI/OHCI controller cannot detect USB hotplug after using MSI.
[Fix]
Disable MSI and fallback to INTx.
[Test]
Hotplug any USB device and nothing gets detected.
With the fix applied the issue is gone.
[Where problems could occur]
Nothing wrong can happen. It was already using INTx before 306c54d0edb6
("usb: hcd: Try MSI interrupts on PCI devices"), and now it goes back to
use INTx again.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1906839/+subscriptions
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