smscufx: change edid data to u8 instead of char

Having "edid" as char caused a problem in ufx_read_edid() where we
compared "edid[i] != 0xFF".  Because of the type difference, the
condition was never true and the error checking failed.

Also I added a __user notation to silence a sparse complaint.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

drivers/video/smscufx.c

@@ -103,7 +103,7 @@ struct ufx_data {
 	struct delayed_work free_framebuffer_work;
 	atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
 	atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
-	char *edid; /* null until we read edid from hw or get from sysfs */
+	u8 *edid; /* null until we read edid from hw or get from sysfs */
 	size_t edid_size;
 	u32 pseudo_palette[256];
 };
@@ -993,7 +993,7 @@ static int ufx_ops_ioctl(struct fb_info *info, unsigned int cmd,
 
 	/* TODO: Update X server to get this from sysfs instead */
 	if (cmd == UFX_IOCTL_RETURN_EDID) {
-		char *edid = (char *)arg;
+		u8 __user *edid = (u8 __user *)arg;
 		if (copy_to_user(edid, dev->edid, dev->edid_size))
 			return -EFAULT;
 		return 0;
@@ -1428,7 +1428,7 @@ static int ufx_i2c_wait_busy(struct ufx_data *dev)
 }
 
 /* reads a 128-byte EDID block from the currently selected port and TAR */
-static int ufx_read_edid(struct ufx_data *dev, char *edid, int edid_len)
+static int ufx_read_edid(struct ufx_data *dev, u8 *edid, int edid_len)
 {
 	int i, j, status;
 	u32 *edid_u32 = (u32 *)edid;
@@ -1491,7 +1491,7 @@ static int ufx_setup_modes(struct ufx_data *dev, struct fb_info *info,
 	char *default_edid, size_t default_edid_size)
 {
 	const struct fb_videomode *default_vmode = NULL;
-	char *edid;
+	u8 *edid;
 	int i, result = 0, tries = 3;
 
 	if (info->dev) /* only use mutex if info has been registered */