usb: gadget: fix wrong endpoint desc
Gadget driver should always use config_ep_by_speed() to initialize usb_ep struct according to usb device's operating speed. Otherwise, usb_ep struct may be wrong if usb devcie's operating speed is changed. The key point in this patch is that we want to make sure the desc pointer in usb_ep struct will be set to NULL when gadget is disconnected. This will force it to call config_ep_by_speed() to correctly initialize usb_ep struct based on the new operating speed when gadget is re-connected later. Reviewed-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: EJ Hsu <ejh@nvidia.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
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2d7b78f59e
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e5b5da96da
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@ -621,8 +621,12 @@ static void ecm_disable(struct usb_function *f)
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DBG(cdev, "ecm deactivated\n");
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if (ecm->port.in_ep->enabled)
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if (ecm->port.in_ep->enabled) {
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gether_disconnect(&ecm->port);
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} else {
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ecm->port.in_ep->desc = NULL;
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ecm->port.out_ep->desc = NULL;
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}
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usb_ep_disable(ecm->notify);
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ecm->notify->desc = NULL;
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@ -618,6 +618,7 @@ static void rndis_disable(struct usb_function *f)
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gether_disconnect(&rndis->port);
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usb_ep_disable(rndis->notify);
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rndis->notify->desc = NULL;
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}
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/*-------------------------------------------------------------------------*/
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