[PATCH 5/6] USB gadget fsl: request cacheline aligned buffer

[Marc Kleine-Budde]

From: Sascha Hauer <s.hauer at pengutronix.de>

The fsl udc driver allocates a buffer for small requests. The
driver then calls dma_inv_range later on it. This buffer happens
to be not cacheline aligned which means that a dma_inv_range can
corrupt other memory around the buffer.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
[mkl: use dma_alloc]
Signed-off-by: Marc Kleine-Budde <mkl at pengutronix.de>
---
 drivers/usb/gadget/fsl_udc.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/fsl_udc.c b/drivers/usb/gadget/fsl_udc.c
index 5b64ec2..2765b41 100644
--- a/drivers/usb/gadget/fsl_udc.c
+++ b/drivers/usb/gadget/fsl_udc.c
@@ -8,7 +8,7 @@
 #include <io.h>
 #include <poller.h>
 #include <asm/byteorder.h>
-#include <asm/mmu.h>
+#include <asm/dma.h>
 
 /* ### define USB registers here
  */
@@ -2109,7 +2109,8 @@ static int struct_udc_setup(struct fsl_udc *udc,
 	udc->status_req = container_of(fsl_alloc_request(NULL),
 			struct fsl_req, req);
 	/* allocate a small amount of memory to get valid address */
-	udc->status_req->req.buf = xmalloc(8);
+	udc->status_req->req.buf = dma_alloc(8);
+	udc->status_req->req.length = 8;
 	udc->resume_state = USB_STATE_NOTATTACHED;
 	udc->usb_state = USB_STATE_POWERED;
 	udc->ep0_dir = 0;
-- 
1.7.4.1