On Mon, Apr 29, 2019 at 09:47:15PM +0200, Takashi Iwai wrote: > Hi, Hi,
> we've got a regression report wrt xhci_hcd and thunderbolt on a Dell > machine. 5.0.7 is confirmed to work, so it must be a regression > introduced by 5.0.8. > > The details are found in openSUSE Bugzilla entry: > https://bugzilla.opensuse.org/show_bug.cgi?id=1132943 > > The probe of xhci_hcd on the dock fails like: > [ 6.269062] pcieport 0000:3a:00.0: enabling device (0006 -> 0007) > [ 6.270027] pcieport 0000:3b:03.0: enabling device (0006 -> 0007) > [ 6.270758] xhci_hcd 0000:3c:00.0: init 0000:3c:00.0 fail, -16 > [ 6.270764] xhci_hcd: probe of 0000:3c:00.0 failed with error -16 > [ 6.271002] xhci_hcd 0000:3d:00.0: init 0000:3d:00.0 fail, -16 > > and later on, thunderbolt gives warnings: > [ 30.232676] thunderbolt 0000:05:00.0: unexpected hop count: 1023 > [ 30.232957] ------------[ cut here ]------------ > [ 30.232958] thunderbolt 0000:05:00.0: interrupt for TX ring 0 is already > enabled > [ 30.232974] WARNING: CPU: 3 PID: 1009 at drivers/thunderbolt/nhi.c:107 > ring_interrupt_active+0x1ea/0x230 [thunderbolt] > > > I blindly suspected the commit 3943af9d01e9 and asked for a reverted > kernel, but in vain. And now it was confirmed that the problem is > present with the latest 5.1-rc, too. > > I put some people who might have interest and the reporter (Michael) > to Cc. If anyone has an idea, feel free to join to the Bugzilla, or > let me know if any help needed from the distro side. Since it exists in 5.1-rcX also it would be good if someone who see the problem (Michael?) could bisect it.
