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usb: renesas_usbhs: fix the BCLR setting condition for non-DCP pipe

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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: e8d548d549 ("usb: renesas_usbhs: fifo became independent from pipe.")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yoshihiro Shimoda 2017-09-27 18:47:12 +09:00 • committed by Greg Kroah-Hartman
parent e85bd5be60
commit a7131ed818
1 changed files with 8 additions and 2 deletions
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10
drivers/usb/renesas_usbhs/fifo.c
View file

@ -285,11 +285,17 @@ 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,