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Re: kern/50185: dwctwo attach failure

The following reply was made to PR kern/50185; it has been noted by GNATS.

From: Martin Husemann <>
To: Nick Hudson <>
Subject: Re: kern/50185: dwctwo attach failure
Date: Tue, 1 Sep 2015 13:15:52 +0200

 On Tue, Sep 01, 2015 at 07:46:56AM +0100, Nick Hudson wrote:
 > dwc2_init is failing and it's not clear to me why
 > Can you get the debug output from a DWC2_DEBUG kernel with dwc2debug set 
 > to 2
 dwctwo0: DWC OTG HCD INIT
 dwctwo0: hcfg=00000000
 dwctwo0: dwc2_core_init(0x980000000ff4f008)
 dwctwo0: dwc2_core_reset()
 dwctwo0: HS UTMI+ PHY selected
 dwctwo0: dwc2_core_reset()
 dwctwo0: External DMA Mode not supported
 dwctwo0: dwc2_hcd_init() FAILED, returning -22
 panic: kernel diagnostic assertion "xc_tailp < xc->xc_headp" failed: file "../../../../kern/subr_xcall.c", line 280 

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