patch "usb: renesas_usbhs: Use dmac only if the pipe type is bulk" added to usb-linus

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    usb: renesas_usbhs: Use dmac only if the pipe type is bulk

to my usb git tree which can be found at
    git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.

If you have any questions about this process, please let me know.


>From 700aa7ff8d2c2b9cc669c99375e2ccd06d3cd38d Mon Sep 17 00:00:00 2001
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Date: Mon, 8 Aug 2016 21:50:53 +0900
Subject: usb: renesas_usbhs: Use dmac only if the pipe type is bulk

This patch fixes an issue that isochronous transfer's data is possible to
be lost as a workaround. Since this driver uses a workqueue to start
the dmac, the transfer is possible to be delayed when system load is high.

Fixes: 6e4b74e4690d ("usb: renesas: fix scheduling in atomic context bug")
Cc: <stable@vger.kernel.org> # v3.4+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---
 drivers/usb/renesas_usbhs/fifo.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 280ed5ff021b..857e78337324 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -871,7 +871,7 @@ static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
 
 	/* use PIO if packet is less than pio_dma_border or pipe is DCP */
 	if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
-	    usbhs_pipe_is_dcp(pipe))
+	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
 		goto usbhsf_pio_prepare_push;
 
 	/* check data length if this driver don't use USB-DMAC */
@@ -976,7 +976,7 @@ static int usbhsf_dma_prepare_pop_with_usb_dmac(struct usbhs_pkt *pkt,
 
 	/* use PIO if packet is less than pio_dma_border or pipe is DCP */
 	if ((pkt->length < usbhs_get_dparam(priv, pio_dma_border)) ||
-	    usbhs_pipe_is_dcp(pipe))
+	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
 		goto usbhsf_pio_prepare_pop;
 
 	fifo = usbhsf_get_dma_fifo(priv, pkt);
-- 
2.9.2