diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2017-09-27 18:47:12 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-12 11:51:16 +0200 |
| commit | 4661c9b526c3801827c9456a635671fd98c8e7ed (patch) | |
| tree | ba133bd72ced10b12eca059ff47db6cda9e38631 /drivers/usb/renesas_usbhs/fifo.c | |
| parent | 760d0f10410aa41d228d4dd580d4892ca902dff0 (diff) | |
usb: renesas_usbhs: fix the BCLR setting condition for non-DCP pipe
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.")
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>
Diffstat (limited to 'drivers/usb/renesas_usbhs/fifo.c')
| -rw-r--r-- | drivers/usb/renesas_usbhs/fifo.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c index 857e78337324..af9dea022cdf 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -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, |