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Date: Wed, 1 Nov 2017 22:25:52 +0100 From: Willy Tarreau <w@....eu> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, linux@...ck-us.net Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>, Felipe Balbi <felipe.balbi@...ux.intel.com>, Willy Tarreau <w@....eu> Subject: [PATCH 3.10 051/139] usb: renesas_usbhs: fix the BCLR setting condition for non-DCP pipe From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com> commit 6124607acc88fffeaadf3aacfeb3cc1304c87387 upstream. This patch fixes an issue that the driver sets the BCLR bit of {C,Dn}FIFOCTR register to 1 even when it's non-DCP pipe and the FRDY bit of {C,Dn}FIFOCTR register is set to 1. Fixes: e8d548d54968 ("usb: renesas_usbhs: fifo became independent from pipe.") Cc: <stable@...r.kernel.org> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com> Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com> Signed-off-by: Willy Tarreau <w@....eu> --- drivers/usb/renesas_usbhs/fifo.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c index 9564756..47a6ffa 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -261,11 +261,17 @@ static void usbhsf_fifo_clear(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo) { struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); + int ret = 0; if (!usbhs_pipe_is_dcp(pipe)) - usbhsf_fifo_barrier(priv, fifo); + ret = usbhsf_fifo_barrier(priv, fifo); - usbhs_write(priv, fifo->ctr, BCLR); + /* + * if non-DCP pipe, this driver should set BCLR when + * usbhsf_fifo_barrier() returns 0. + */ + if (!ret) + usbhs_write(priv, fifo->ctr, BCLR); } static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv, -- 2.8.0.rc2.1.gbe9624a
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