diff --git a/mdadm-3.1.5-unused-param.patch b/mdadm-3.1.5-unused-param.patch
index 33b3c62..e182274 100644
--- a/mdadm-3.1.5-unused-param.patch
+++ b/mdadm-3.1.5-unused-param.patch
@@ -95,21 +95,25 @@
  			}
  		}
 --- mdadm-3.1.5/sysfs.c.param	2011-03-26 14:03:54.206714522 -0400
-+++ mdadm-3.1.5/sysfs.c	2011-03-26 14:04:37.277821858 -0400
-@@ -422,7 +422,6 @@ int sysfs_set_num(struct mdinfo *sra, st
++++ mdadm-3.1.5/sysfs.c	2011-03-26 14:16:12.101936859 -0400
+@@ -422,7 +422,7 @@ int sysfs_set_num(struct mdinfo *sra, st
  int sysfs_uevent(struct mdinfo *sra, char *event)
  {
  	char fname[50];
 -	int n;
++	unsigned int n;
  	int fd;
  
  	sprintf(fname, "/sys/block/%s/uevent",
-@@ -430,7 +429,7 @@ int sysfs_uevent(struct mdinfo *sra, cha
- 	fd = open(fname, O_WRONLY);
- 	if (fd < 0)
+@@ -432,6 +432,11 @@ int sysfs_uevent(struct mdinfo *sra, cha
  		return -1;
--	n = write(fd, event, strlen(event));
-+	write(fd, event, strlen(event));
+ 	n = write(fd, event, strlen(event));
  	close(fd);
++	if (n != strlen(event)) {
++		dprintf(Name ": failed to write '%s' to '%s' (%s)\n",
++			event, fname, strerror(errno));
++		return -1;
++	}
  	return 0;
  }	
+