drivers/video/kyro/* - compile warning cleanup

diff -Nurdp -X dontdiff-osdl linux-2.6.11-rc3-mm-original/drivers/video/kyro/fbdev.c linux-2.6.11-rc3-mm/drivers/video/kyro/fbdev.c
@@ -596,7 +596,10 @@ static int kyrofb_ioctl(struct inode *in
 
 	switch (cmd) {
 	case KYRO_IOCTL_OVERLAY_CREATE:
-		copy_from_user(&ol_create, argp, sizeof(overlay_create));
+		if (copy_from_user(&ol_create, argp, sizeof(overlay_create))) {
+			printk(KERN_ERR "copy_from_user failed!\n");
+			return -EFAULT;
+		}
 
 		if (kyro_dev_overlay_create(ol_create.ulWidth,
 					    ol_create.ulHeight, 0) < 0) {

@@ -606,8 +609,11 @@ static int kyrofb_ioctl(struct inode *in
 		}
 		break;
 	case KYRO_IOCTL_OVERLAY_VIEWPORT_SET:
-		copy_from_user(&ol_viewport_set, argp,
-			       sizeof(overlay_viewport_set));
+		if (copy_from_user(&ol_viewport_set, argp,
+			       sizeof(overlay_viewport_set))) {
+			printk(KERN_ERR "copy_from_user failed!\n");
+			return -EFAULT;
+		}
 
 		if (kyro_dev_overlay_viewport_set(ol_viewport_set.xOrgin,
 						  ol_viewport_set.yOrgin,

@@ -627,13 +633,22 @@ static int kyrofb_ioctl(struct inode *in
 		}
 		break;
 	case KYRO_IOCTL_UVSTRIDE:
-		copy_to_user(argp, &deviceInfo.ulOverlayUVStride, sizeof(unsigned long));
+		if (copy_to_user(argp, &deviceInfo.ulOverlayUVStride, sizeof(unsigned long))) {
+			printk(KERN_ERR "copy_to_user failed!\n");
+			return -EFAULT;
+		}
 		break;
 	case KYRO_IOCTL_STRIDE:
-		copy_to_user(argp, &deviceInfo.ulOverlayStride, sizeof(unsigned long));
+		if (copy_to_user(argp, &deviceInfo.ulOverlayStride, sizeof(unsigned long))) {
+			printk(KERN_ERR "copy_to_user failed!\n");
+			return -EFAULT;
+		}
 		break;
 	case KYRO_IOCTL_OVERLAY_OFFSET:
-		copy_to_user(argp, &deviceInfo.ulOverlayOffset, sizeof(unsigned long));
+		if (copy_to_user(argp, &deviceInfo.ulOverlayOffset, sizeof(unsigned long))) {
+			printk(KERN_ERR "copy_to_user failed!\n");
+			return -EFAULT;
+		}
 		break;
 	}