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Commit 5e582ff3 authored by Kazuya Mizuguchi's avatar Kazuya Mizuguchi Committed by Greg Kroah-Hartman
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usb: renesas_usbhs: Fix fifo unclear in usbhsf_prepare_pop 



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: default avatarKazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 138c3f03

drivers/usb/renesas_usbhs/fifo.c

+5 −0
Original line number Diff line number Diff line
@@ -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);