linux-kernel - [PATCH 4.7 039/143] usb: renesas_usbhs: Fix receiving data corrupt on R-Car Gen3 with dmac

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Date:   Mon,  5 Sep 2016 18:43:35 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>
Subject: [PATCH 4.7 039/143] usb: renesas_usbhs: Fix receiving data corrupt on R-Car Gen3 with dmac

4.7-stable review patch.  If anyone has any objections, please let me know.

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

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

commit 772ce81264b179c0e61340998e3b29e900b2fa6d upstream.

Since R-Car Gen3 SoC has the USB-DMAC, this driver should set
dparam->has_usb_dmac to 1. Otherwise, behavior of this driver and
the usb-dmac driver will be mismatch, then sometimes receiving data will
be corrupt.

Fixes: de18757e272d ("usb: renesas_usbhs: add R-Car Gen3 power control")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/renesas_usbhs/common.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -514,7 +514,8 @@ static struct renesas_usbhs_platform_inf
 	if (gpio > 0)
 		dparam->enable_gpio = gpio;
 
-	if (dparam->type == USBHS_TYPE_RCAR_GEN2)
+	if (dparam->type == USBHS_TYPE_RCAR_GEN2 ||
+	    dparam->type == USBHS_TYPE_RCAR_GEN3)
 		dparam->has_usb_dmac = 1;
 
 	return info;