4.14-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 4.6.4 / usb-musb-host-correct-cppi-dma-channel-for-isoch-transfer.patch

From 04471eb8c3158c0ad9df4b24da845a63b2e8f23a Mon Sep 17 00:00:00 2001
From: Bin Liu <b-liu@ti.com>
Date: Tue, 31 May 2016 10:05:25 -0500
Subject: usb: musb: host: correct cppi dma channel for isoch transfer

From: Bin Liu <b-liu@ti.com>

commit 04471eb8c3158c0ad9df4b24da845a63b2e8f23a upstream.

Incorrect cppi dma channel is referenced in musb_rx_dma_iso_cppi41(),
which causes kernel NULL pointer reference oops later when calling
cppi41_dma_channel_program().

Fixes: 069a3fd (usb: musb: Remove ifdefs for musb_host_rx in musb_host.c
part1)

Reported-by: Matwey V. Kornilov <matwey@sai.msu.ru>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/musb/musb_host.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1556,7 +1556,7 @@ static int musb_rx_dma_iso_cppi41(struct
 				  struct urb *urb,
 				  size_t len)
 {
-	struct dma_channel *channel = hw_ep->tx_channel;
+	struct dma_channel *channel = hw_ep->rx_channel;
 	void __iomem *epio = hw_ep->regs;
 	dma_addr_t *buf;
 	u32 length, res;