Hi, On Tue, Nov 26, 2013 at 06:28:05PM +0100, Pali Rohár wrote: [ snip ] > > > (above dump is from 3.12-rc5 kernel) > > > > looks like it's trying to do i2c transfers from atomic. But > > why only when obex is enabled ? Makes no sense. What do you > > have on userland ? Is there anything trying to access the > > obex interface ? Was the USB cable attached at that time ? > > Yes, only when initliaizing obex. Other is ok. Problem is there > with Maemo userland and also with clean userland (rescueOS) where > is only busybox and some simple init scripts. On Maemo maybe > something is trying to access obex, but on rescueOS for sure > nothing. Problem happends when cable is attached and also when > not = always. As a debug effort, can you apply hack below and see if it "helps" ? diff --git a/drivers/usb/gadget/f_obex.c b/drivers/usb/gadget/f_obex.c index ad39f1d..4af2f06 100644 --- a/drivers/usb/gadget/f_obex.c +++ b/drivers/usb/gadget/f_obex.c @@ -267,10 +267,12 @@ static void obex_connect(struct gserial *g) if (!obex->can_activate) return; +#if 0 status = usb_function_activate(&g->func); if (status) DBG(cdev, "obex ttyGS%d function activate --> %d\n", obex->port_num, status); +#endif } static void obex_disconnect(struct gserial *g) @@ -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", -- balbi
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