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usb: chipidea: udc: only clear active and halted bits in qhead

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The datasheet of the synopsys core describes only to overwrite the
active and halted bits in the qhead before priming any endpoint.

Signed-off-by: Michael Grzeschik <[email protected]>
Reviewed-by: Felipe Balbi <[email protected]>
[Alex: fixed a case of line-too-long]
Signed-off-by: Alexander Shishkin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Michael Grzeschik 2013-03-30 12:54:04 +02:00 • committed by Greg Kroah-Hartman
commit 080ff5f471
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/chipidea/udc.c
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@ -461,7 +461,8 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
/* QH configuration */
mEp->qh.ptr->td.next = cpu_to_le32(mReq->dma); /* TERMINATE = 0 */
mEp->qh.ptr->td.token &= cpu_to_le32(~TD_STATUS); /* clear status */
mEp->qh.ptr->td.token &=
cpu_to_le32(~(TD_STATUS_HALTED|TD_STATUS_ACTIVE));
mEp->qh.ptr->cap |= cpu_to_le32(QH_ZLT);
wmb(); /* synchronize before ep prime */