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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: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
hifive-unleashed-5.1
Robert Baldyga 2013-12-06 13:03:45 +01:00 committed by Felipe Balbi
parent 295538ff7e
commit b963a81a48
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/gadget/s3c-hsotg.c
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@ -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) \