ALSA: line6: Return EIO if read/write not successful

Signed-off-by: Chris Rorvick <chris@rorvick.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c
index f2ee804..6c2d418 100644
--- a/sound/usb/line6/driver.c
+++ b/sound/usb/line6/driver.c
@@ -349,7 +349,7 @@
 		dev_err(line6->ifcdev,
 			"length mismatch (expected %d, got %d)\n",
 			(int)datalen, (int)len);
-		return -EINVAL;
+		return -EIO;
 	}
 
 	/* receive the result: */
@@ -415,7 +415,7 @@
 		return -EIO;
 	} else if (status != 0) {
 		dev_err(line6->ifcdev, "write failed (error %d)\n", ret);
-		return -EINVAL;
+		return -EIO;
 	}
 
 	return 0;