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usb: gadget: r8a66597-udc: fix flush fifo handling
The "BCLR" in CFIFOCTR/DnFIFOCTR can flush the fifo of "CPU side" only. To flush the fifo of "SIE side", we have to use the "ACLRM" in PIPEnCTR. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -1718,6 +1718,8 @@ static void r8a66597_fifo_flush(struct usb_ep *_ep)
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if (list_empty(&ep->queue) && !ep->busy) {
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pipe_stop(ep->r8a66597, ep->pipenum);
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r8a66597_bclr(ep->r8a66597, BCLR, ep->fifoctr);
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r8a66597_write(ep->r8a66597, ACLRM, ep->pipectr);
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r8a66597_write(ep->r8a66597, 0, ep->pipectr);
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}
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spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
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}
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