Re: [PATCH V3] usb: musb: Fix unstable init of OTG_INTERFSEL.

[Felipe Balbi <balbi@ti.com>]

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Hi,

On Tue, Dec 17, 2013 at 05:48:33PM +0100, anaumann@ultratronik.de wrote:
> From: Andreas Naumann <anaumann@ultratronik.de>
> 
> This is a hard to reproduce problem which leads to non-functional
> USB-OTG port in 0.1%-1% of all boots. Tracked it down to commit
> e25bec160158abe86c276d7d206264afc3646281, which introduces save/restore
> of OTG_INTERFSEL over suspend.
> Since the resume function is also called early in driver init, it uses a
> non-initialized value (which is 0 and a non-supported setting in DM37xx
> for INTERFSEL). Shortly after the correct value is set. Apparently this
> works most time, but not always.

yeah, but the problem is not on the glue layer. The bug is omap_device
and pm_runtime not agreeing on device's state. I suppose there was a fix
for that recently in linux-omap@vger mailing list.

-- 
balbi

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