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Subject[PATCH 4.4 24/32] usb: musb: host: correct cppi dma channel for isoch transfer
Date
4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

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;

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