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usb: chipidea: udc: refine ep operation at isr_tr_complete_handler 

- delete the warning message at interrupt handler, and adds judgement at
ep_enable, if non-ep0 requests ctrl transfer, it will indicate an error.
- delete hw_test_and_clear_setup_status which is a broken code
- Tested with g_mass_storage, g_ncm, g_ether

Cc: matthieu.castet@parrot.com
Reported-by: Michael Grzeschik <mgr@pengutronix.de>
Acked-by: Michael Grzeschik <mgr@pengutronix.de>
Tested-by: Michael Grzeschik <mgr@pengutronix.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Chen 2014-02-19 13:41:41 +08:00 committed by Greg Kroah-Hartman
parent c859aa65a7
commit 64fc06c40e
1 changed files with 8 additions and 20 deletions
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28
drivers/usb/chipidea/udc.c
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@ -177,19 +177,6 @@ static int hw_ep_get_halt(struct ci_hdrc *ci, int num, int dir)
return hw_read(ci, OP_ENDPTCTRL + num, mask) ? 1 : 0;
}
/**
* hw_test_and_clear_setup_status: test & clear setup status (execute without
* interruption)
* @n: endpoint number
*
* This function returns setup status
*/
static int hw_test_and_clear_setup_status(struct ci_hdrc *ci, int n)
{
n = ep_to_bit(ci, n);
return hw_test_and_clear(ci, OP_ENDPTSETUPSTAT, BIT(n));
}
/**
* hw_ep_prime: primes endpoint (execute without interruption)
* @num: endpoint number
@ -997,15 +984,11 @@ __acquires(ci->lock)
}
}
if (hwep->type != USB_ENDPOINT_XFER_CONTROL ||
!hw_test_and_clear_setup_status(ci, i))
/* Only handle setup packet below */
if (i != 0 ||
!hw_test_and_clear(ci, OP_ENDPTSETUPSTAT, BIT(0)))
continue;
if (i != 0) {
dev_warn(ci->dev, "ctrl traffic at endpoint %d\n", i);
continue;
}
/*
* Flush data and handshake transactions of previous
* setup packet.
@ -1193,6 +1176,11 @@ static int ep_enable(struct usb_ep *ep,
hwep->qh.ptr->td.next |= cpu_to_le32(TD_TERMINATE); /* needed? */
if (hwep->num != 0 && hwep->type == USB_ENDPOINT_XFER_CONTROL) {
dev_err(hwep->ci->dev, "Set control xfer at non-ep0\n");
retval = -EINVAL;
}
/*
* Enable endpoints in the HW other than ep0 as ep0
* is always enabled