Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/dev/i2c/i2c.c,v
rcsdiff: /ftp/cvs/cvsroot/src/sys/dev/i2c/i2c.c,v: warning: Unknown phrases like `commitid ...;' are present.
retrieving revision 1.44
retrieving revision 1.44.2.2
diff -u -p -r1.44 -r1.44.2.2
--- src/sys/dev/i2c/i2c.c	2014/07/25 08:10:37	1.44
+++ src/sys/dev/i2c/i2c.c	2015/05/16 04:06:04	1.44.2.2
@@ -1,4 +1,4 @@
-/*	$NetBSD: i2c.c,v 1.44 2014/07/25 08:10:37 dholland Exp $	*/
+/*	$NetBSD: i2c.c,v 1.44.2.2 2015/05/16 04:06:04 snj Exp $	*/
 
 /*
  * Copyright (c) 2003 Wasabi Systems, Inc.
@@ -36,7 +36,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: i2c.c,v 1.44 2014/07/25 08:10:37 dholland Exp $");
+__KERNEL_RCSID(0, "$NetBSD: i2c.c,v 1.44.2.2 2015/05/16 04:06:04 snj Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -519,6 +519,15 @@ iic_ioctl_exec(struct iic_softc *sc, i2c
 		}
 	}
 
+	if (iie->iie_buf != NULL && I2C_OP_WRITE_P(iie->iie_op)) {
+		error = copyin(iie->iie_buf, buf, iie->iie_buflen);
+		if (error) {
+			if (cmd)
+				kmem_free(cmd, iie->iie_cmdlen);
+			return error;
+		}
+	}
+
 	iic_acquire_bus(ic, 0);
 	error = iic_exec(ic, iie->iie_op, iie->iie_addr, cmd, iie->iie_cmdlen,
 	    buf, iie->iie_buflen, 0);
@@ -536,7 +545,7 @@ iic_ioctl_exec(struct iic_softc *sc, i2c
 	if (error)
 		return error;
 
-	if (iie->iie_buf)
+	if (iie->iie_buf != NULL && I2C_OP_READ_P(iie->iie_op))
 		error = copyout(buf, iie->iie_buf, iie->iie_buflen);
 
 	return error;