From b963a81a4803fb387d6551ea0fb66876e0c8ff12 Mon Sep 17 00:00:00 2001 From: Robert Baldyga Date: Fri, 6 Dec 2013 13:03:45 +0100 Subject: [PATCH] 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: Robert Baldyga Signed-off-by: Kyungmin Park Signed-off-by: Felipe Balbi --- drivers/usb/gadget/s3c-hsotg.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c index 2fa7a9c593e3..6c80bfcefa87 100644 --- a/drivers/usb/gadget/s3c-hsotg.c +++ b/drivers/usb/gadget/s3c-hsotg.c @@ -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) \ -- 2.20.1