Hello people, since the introduction of the bounce buffer, a regression with TB3 devices has been introduced. USB devices attached to TB3 refuse to work since. Removing the commits that introduced the bounce buffer, fixes the issue.
Commits: 3b53034c268d550d9e8522e613a14ab53b8840d8 c5a5dc4cbbf4540c1891cdb2b70cf469405ea61f cfb94a372f2d4ee226247447c863f8709863d170 e5e04d051979dbd636a99099b7a595093c50a4bc An excerpt of the trace: > [ +0,000005] WARNING: CPU: 10 PID: 0 at drivers/iommu/intel-iommu.c:3916 > bounce_unmap_single+0x103/0x110 > [...] > [ +0,000001] Call Trace: > [ +0,000002] <IRQ> > [ +0,000003] usb_hcd_unmap_urb_setup_for_dma+0x9f/0xe0 > [ +0,000001] usb_hcd_unmap_urb_for_dma+0x1c/0x170 > [ +0,000002] __usb_hcd_giveback_urb+0x36/0x120 > [ +0,000008] xhci_giveback_urb_in_irq.isra.0+0x72/0x100 [xhci_hcd] > [ +0,000007] xhci_td_cleanup+0x101/0x140 [xhci_hcd] > [ +0,000007] xhci_irq+0xbf0/0x1db0 [xhci_hcd] > [ +0,000005] __handle_irq_event_percpu+0x44/0x1b0 > [ +0,000002] handle_irq_event_percpu+0x34/0x80 > [ +0,000002] handle_irq_event+0x37/0x54 > [ +0,000002] handle_edge_irq+0xae/0x1f0 > [ +0,000002] do_IRQ+0x84/0x140 > [ +0,000003] common_interrupt+0xf/0xf > [ +0,000001] </IRQ> Dmesg log and further information have been posted here: https://bugzilla.kernel.org/show_bug.cgi?id=205893 Cheers, Frederik
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