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usb: gadget: clean the ep in autoconf before returning it. 

Since commit 72c973dd aka ("usb: gadget: add usb_endpoint_descriptor to
struct usb_ep) the descriptor is part of the ep. Most gadgets like
g_zero or masstorage call config_ep_by_speed() to grab an available
endpoint which may be used for FS/HS/SS bulk/iso/intr and in a second
they assign the proper descriptor by calling config_ep_by_speed(). This
is good so far. A few of them like ncm call config_ep_by_speed() only if
ep->desc not assigned earlier. That means ep->desc is never assigned if
the endpoint was used by another gadget before it was removed.

Some of those gadgets also assign ep->driver_data to NULL on reset or
ep_disable part _but_ keep a reference to this endpoint. At ep_enable
time they assign driver_data to their private data. This probably needs
a clean up of its own.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Sebastian Andrzej Siewior 2012-02-06 18:46:35 +01:00 committed by Felipe Balbi
parent 637b78eb31
commit 609ca22807
1 changed files with 10 additions and 6 deletions
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16
drivers/usb/gadget/epautoconf.c
View File

@ -275,24 +275,24 @@ struct usb_ep *usb_ep_autoconfig_ss(
/* ep-e, ep-f are PIO with only 64 byte fifos */
ep = find_ep (gadget, "ep-e");
if (ep && ep_matches(gadget, ep, desc, ep_comp))
return ep;
goto found_ep;
ep = find_ep (gadget, "ep-f");
if (ep && ep_matches(gadget, ep, desc, ep_comp))
return ep;
goto found_ep;
} else if (gadget_is_goku (gadget)) {
if (USB_ENDPOINT_XFER_INT == type) {
/* single buffering is enough */
ep = find_ep(gadget, "ep3-bulk");
if (ep && ep_matches(gadget, ep, desc, ep_comp))
return ep;
goto found_ep;
} else if (USB_ENDPOINT_XFER_BULK == type
&& (USB_DIR_IN & desc->bEndpointAddress)) {
/* DMA may be available */
ep = find_ep(gadget, "ep2-bulk");
if (ep && ep_matches(gadget, ep, desc,
ep_comp))
return ep;
goto found_ep;
}
#ifdef CONFIG_BLACKFIN
@ -311,18 +311,22 @@ struct usb_ep *usb_ep_autoconfig_ss(
} else
ep = NULL;
if (ep && ep_matches(gadget, ep, desc, ep_comp))
return ep;
goto found_ep;
#endif
}
/* Second, look at endpoints until an unclaimed one looks usable */
list_for_each_entry (ep, &gadget->ep_list, ep_list) {
if (ep_matches(gadget, ep, desc, ep_comp))
return ep;
goto found_ep;
}
/* Fail */
return NULL;
found_ep:
ep->desc = NULL;
ep->comp_desc = NULL;
return ep;
}
/**