Re: BUG: usb: obex in g_nokia.ko causing kernel panic

From: Pali RohÃr
Date: Sun Jan 26 2014 - 17:06:52 EST


2014-01-09 Pali RohÃr <pali.rohar@xxxxxxxxx>:
> On Wednesday 27 November 2013 18:39:04 Felipe Balbi wrote:
>> Hi,
>>
>> On Wed, Nov 27, 2013 at 05:40:42PM +0100, Pali RohÃr wrote:
>> > > > > > @@ -282,10 +284,12 @@ static void
>> > > > > > obex_disconnect(struct gserial *g) if
>> > > > > > (!obex->can_activate)
>> > > > > >
>> > > > > > return;
>> > > > > >
>> > > > > > +#if 0
>> > > > > >
>> > > > > > status = usb_function_deactivate(&g->func);
>> > > > > > if (status)
>> > > > > >
>> > > > > > DBG(cdev, "obex ttyGS%d function deactivate -->
>> > > > > > %d\n",
>> > > > > >
>> > > > > > obex->port_num, status);
>> > > > > >
>> > > > > > +#endif
>> > > > > >
>> > > > > > }
>> > > > > >
>> > > > > > /*-------------------------------------------------
>> > > > > > ---- ------
>> > > > > >
>> > > > > > --------------*/ @@ -372,6 +376,7 @@ static int
>> > > > > > obex_bind(struct usb_configuration *c, struct
>> > > > > > usb_function *f) if (status)
>> > > > > >
>> > > > > > goto fail;
>> > > > > >
>> > > > > > +#if 0
>> > > > > >
>> > > > > > /* Avoid letting this gadget enumerate until the
>> > > > > > userspace
>> > > > > >
>> > > > > > * OBEX server is active.
>> > > > > > */
>> > > > > >
>> > > > > > @@ -381,6 +386,7 @@ static int obex_bind(struct
>> > > > > > usb_configuration *c, struct usb_function *f)
>> > > > > > obex->port_num, status);
>> > > > > >
>> > > > > > else
>> > > > > >
>> > > > > > obex->can_activate = true;
>> > > > > >
>> > > > > > +#endif
>> > > > > >
>> > > > > > DBG(cdev, "obex ttyGS%d: %s speed IN/%s OUT/%s\n",
>> > > > >
>> > > > > Hi, with above patch g_nokia.ko working and not
>> > > > > crashing.
>> > > >
>> > > > yeah, makes sense. We shouldn't call phy operations in
>> > > > atomic context. I'll see how easy it would be to fix
>> > > > that. Real patch coming soon(-ish).
>> > >
>> > > I think we could send diff below for the -rc cycle and
>> > > figure out a better to handle this for the merge window.
>> > > Can you check if it also works with patch below ?
>> > >
>> > > diff --git a/drivers/usb/musb/omap2430.c
>> > > b/drivers/usb/musb/omap2430.c index 2a408cd..8aa59a2
>> > > 100644 --- a/drivers/usb/musb/omap2430.c
>> > > +++ b/drivers/usb/musb/omap2430.c
>> > > @@ -659,7 +659,6 @@ static int
>> > > omap2430_runtime_suspend(struct device *dev)
>> > > OTG_INTERFSEL);
>> > >
>> > > omap2430_low_level_exit(musb);
>> > >
>> > > - phy_power_off(musb->phy);
>> > >
>> > > }
>> > >
>> > > return 0;
>> > >
>> > > @@ -674,7 +673,6 @@ static int
>> > > omap2430_runtime_resume(struct device *dev)
>> > > omap2430_low_level_init(musb);
>> > >
>> > > musb_writel(musb->mregs, OTG_INTERFSEL,
>> > >
>> > > musb->context.otg_interfsel);
>> > >
>> > > - phy_power_on(musb->phy);
>> > >
>> > > }
>> > >
>> > > return 0;
>> >
>> > Hi, I applied similar patch (commented usb_phy_set_suspend
>> > instead phy_power_on/off) on 3.12-rc5 and it working too, no
>> > crash. I do not have rebased n900 patches on top of 3.13
>> > tree, so I cannot check it. But I think phy_power_on/off
>> > doing same as usb_phy_set_suspend in 3.12.
>>
>> cool, I'll send this during the -rc and Cc stable, then I'll
>> manually backport it to stable later.
>
> PING!
>
> I still do not see this patch in linus tree. What happened?
>
> --
> Pali RohÃr
> pali.rohar@xxxxxxxxx

BUMP

Is there any problem with above patch?

--
Pali RohÃr
pali.rohar@xxxxxxxxx
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