diff --git a/drivers/staging/android/logger.c b/drivers/staging/android/logger.c
index 6d92b7ef0a55..0d2367f2c15f 100644
--- a/drivers/staging/android/logger.c
+++ b/drivers/staging/android/logger.c
@@ -330,6 +330,12 @@ static ssize_t do_write_log_from_user(struct logger_log *log,
 
 	if (count != len)
 		if (copy_from_user(log->buffer, buf + len, count - len))
+			/*
+			 * Note that by not updating w_off, this abandons the
+			 * portion of the new entry that *was* successfully
+			 * copied, just above.  This is intentional to avoid
+			 * message corruption from missing fragments.
+			 */
 			return -EFAULT;
 
 	log->w_off = logger_offset(log, log->w_off + count);