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usb: renesas_usbhs: Fix fifo unclear in usbhsf_prepare_pop

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This patch fixes an issue for control write. When usbhsf_prepare_pop()
is called after this driver called a gadget setup function, this controller
doesn't receive the control write data. So, this patch adds a code to clear
the fifo for control write in usbhsf_prepare_pop().

Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kazuya Mizuguchi 2015-05-26 20:13:42 +09:00 committed by Greg Kroah-Hartman
parent 138c3f03b0
commit 5e582ff309
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/renesas_usbhs/fifo.c
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@ -611,6 +611,8 @@ struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
if (usbhs_pipe_is_busy(pipe))
return 0;
@ -624,6 +626,9 @@ static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
usbhs_pipe_data_sequence(pipe, pkt->sequence);
pkt->sequence = -1; /* -1 sequence will be ignored */
if (usbhs_pipe_is_dcp(pipe))
usbhsf_fifo_clear(pipe, fifo);
usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
usbhs_pipe_enable(pipe);
usbhs_pipe_running(pipe, 1);