[Bug 215906] DMAR fault when connected usb hub (xhci_hcd)

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https://bugzilla.kernel.org/show_bug.cgi?id=215906

Mathias Nyman (mathias.nyman@xxxxxxxxxxxxxxx) changed:

           What    |Removed                     |Added
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                 CC|                            |mathias.nyman@linux.intel.c
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--- Comment #6 from Mathias Nyman (mathias.nyman@xxxxxxxxxxxxxxx) ---
[  +0,229229] xhci_hcd 0000:04:00.0: WARNING: Host System Error

The xHC controller reports a catastrophic error, and sets HSE bit.

For PCI xHC controllers the spec lists possible causes as:
host controller PCI parity error, PCI Master Abort, PCI Target Abort.
But DMA issues also possible cause, especially as log shows  DMAR
problems right after this.

Any chance you could bisect this on upstream kernel?

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