[Bug 215740] kernel warning: DMA-API: xhci_hcd: cacheline tracking EEXIST, overlapping mappings aren't supported

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https://bugzilla.kernel.org/show_bug.cgi?id=215740

Lukas Wunner (lukas@xxxxxxxxx) changed:

           What    |Removed                     |Added
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                 CC|                            |lukas@xxxxxxxxx

--- Comment #6 from Lukas Wunner (lukas@xxxxxxxxx) ---
Ferry Toth reports that the warning only occurs when connecting a LAN9514 USB
Ethernet (drivers/net/usb/smsc95xx.c). Other USB devices (memory sticks, WiFi,
Bluetooth) do not trigger the warning:

https://lore.kernel.org/netdev/2a436486-a54d-a9b3-d839-232a38653af3@xxxxxxxxx/

Curiously, the above-linked other reports seem to indicate that the warning
occurs when connecting USB hubs. It's unclear what those have in common with
the LAN9514.

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