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Commit b963a81a authored by Robert Baldyga's avatar Robert Baldyga Committed by Felipe Balbi
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usb: gadget: s3c-hsotg: add flush TX FIFO when kill all requests 



This patch adds flushing TX FIFO in kill_all_requests() function in
dedicated-fifo mode. It's because when requests are killed (when endpoint is
disabled or in case of device reset/disconnection) in FIFO can stay some
unsent data. In the worst case FIFO can stay full, and then if endpoint will
be back enabled, sending new data will be impossible.

Signed-off-by: default avatarRobert Baldyga <r.baldyga@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 295538ff

drivers/usb/gadget/s3c-hsotg.c

+3 −0
Original line number Diff line number Diff line
@@ -2150,6 +2150,9 @@ static void kill_all_requests(struct s3c_hsotg *hsotg, 
		s3c_hsotg_complete_request(hsotg, ep, req,

					   result);

	}

	if(hsotg->dedicated_fifos)

		if ((readl(hsotg->regs + DTXFSTS(ep->index)) & 0xffff) * 4 < 3072)

			s3c_hsotg_txfifo_flush(hsotg, ep->index);

}



#define call_gadget(_hs, _entry) \