Patch "usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer" has been added to the 3.14-stable tree

Patch "usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer" has been added to the 3.14-stable tree

[gregkh]

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

    usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-renesas_usbhs-disable-tx-irq-before-starting-tx-dmac-transfer.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 6490865c67825277b29638e839850882600b48ec Mon Sep 17 00:00:00 2001
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Date: Thu, 10 Mar 2016 11:30:15 +0900
Subject: usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer

From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

commit 6490865c67825277b29638e839850882600b48ec upstream.

This patch adds a code to surely disable TX IRQ of the pipe before
starting TX DMAC transfer. Otherwise, a lot of unnecessary TX IRQs
may happen in rare cases when DMAC is used.

Fixes: e73a989 ("usb: renesas_usbhs: add DMAEngine support")
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>

---
 drivers/usb/renesas_usbhs/fifo.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -934,6 +934,7 @@ static int usbhsf_dma_try_pop(struct usb
 
 	pkt->trans = len;
 
+	usbhsf_tx_irq_ctrl(pipe, 0);
 	INIT_WORK(&pkt->work, xfer_work);
 	schedule_work(&pkt->work);
 


Patches currently in stable-queue which might be from yoshihiro.shimoda.uh@renesas.com are

queue-3.14/usb-renesas_usbhs-avoid-null-pointer-derefernce-in-usbhsf_pkt_handler.patch
queue-3.14/usb-renesas_usbhs-disable-tx-irq-before-starting-tx-dmac-transfer.patch