Messages in this thread Patch in this message | | | From | Robert Baldyga <> | Subject | [PATCH 2/2] USB: gadget: s3c-hsotg: add flush TX FIFO when kill all requests | Date | Fri, 06 Dec 2013 13:03:45 +0100 |
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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>
--- 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 ad9a4ed..4a085e6 100644 --- a/drivers/usb/gadget/s3c-hsotg.c +++ b/drivers/usb/gadget/s3c-hsotg.c @@ -2156,6 +2156,9 @@ 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) \ -- 1.7.9.5
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