linux-kernel - `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13 9370

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Date:   Tue, 15 May 2018 16:34:03 +0200
From:   Paul Menzel <pmenzel+linux-usb@...gen.mpg.de>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mario Limonciello <mario.limonciello@...l.com>
Subject: `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13
 9370

Dear Linux folks,


Linux 4.17-rc5 shows the error below on the Dell XPS 13 9370 with Debian 
Sid/unstable.

```
[…]
[    0.440240] usb: port power management may be unreliable
[    0.441358] usbcore: registered new interface driver usb-storage
[    0.441367] usbcore: registered new interface driver usbserial_generic
[    0.441369] usbserial: USB Serial support registered for generic
[    0.441383] ioremap error for 0x3f799000-0x3f79a000, requested 0x2, 
got 0x0
[    0.441518] ucsi_acpi: probe of USBC000:00 failed with error -12
[…]
```

1.  Are the ioremap and ucsi_acpi error related or is a separate report 
needed?
2.  Do you know the reason for the ucsi_acpi error?


Kind regards,

Paul

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