[PATCH 3/4] USB: sisusbvga: change the buffer in sisusb_recv_bulk_msg from char to u8

[Changming Liu <charley.ashbringer@gmail.com>]

This patch changes the userbuffer of sisusb_recv_bulk_msg from char to u8
to avoid related UB.

Also, for kernbuffer declared as void* in the function header, force cast 
the passed-in parameters from char* to u8*.

Signed-off-by: Changming Liu <charley.ashbringer@gmail.com>
---
 drivers/usb/misc/sisusbvga/sisusb.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/misc/sisusbvga/sisusb.c b/drivers/usb/misc/sisusbvga/sisusb.c
index 8878c28..86638c1 100644
--- a/drivers/usb/misc/sisusbvga/sisusb.c
+++ b/drivers/usb/misc/sisusbvga/sisusb.c
@@ -448,7 +448,7 @@ static int sisusb_send_bulk_msg(struct sisusb_usb_data *sisusb, int ep, int len,
  */
 
 static int sisusb_recv_bulk_msg(struct sisusb_usb_data *sisusb, int ep, int len,
-		void *kernbuffer, char __user *userbuffer, ssize_t *bytes_read,
+		void *kernbuffer, u8 __user *userbuffer, ssize_t *bytes_read,
 		unsigned int tflags)
 {
 	int result = 0, retry, count = len;
@@ -551,7 +551,7 @@ static int sisusb_send_packet(struct sisusb_usb_data *sisusb, int len,
 		 *    return value and write it to packet->data
 		 */
 		ret = sisusb_recv_bulk_msg(sisusb, SISUSB_EP_GFX_IN, 4,
-				(char *)&tmp, NULL, &bytes_transferred, 0);
+				(u8 *)&tmp, NULL, &bytes_transferred, 0);
 
 		packet->data = le32_to_cpu(tmp);
 	}
@@ -587,7 +587,7 @@ static int sisusb_send_bridge_packet(struct sisusb_usb_data *sisusb, int len,
 		 *    return value and write it to packet->data
 		 */
 		ret = sisusb_recv_bulk_msg(sisusb, SISUSB_EP_BRIDGE_IN, 4,
-				(char *)&tmp, NULL, &bytes_transferred, 0);
+				(u8 *)&tmp, NULL, &bytes_transferred, 0);
 
 		packet->data = le32_to_cpu(tmp);
 	}
-- 
2.7.4