[PATCH] um: fix errno usage

Avoid reusing userspace errno twice - it can be cleared by libc code
everywhere (in particular printk() does clear it in my setup).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[e-mail]>
Acked-by: Jeff Dike <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/um/drivers/daemon_user.c

···
 
 	pri->control = socket(AF_UNIX, SOCK_STREAM, 0);
 	if(pri->control < 0){
+		err = -errno;
 		printk("daemon_open : control socket failed, errno = %d\n", 
-		       errno);		
-		return(-errno);
+		       -err);
+		return err;
 	}
 
 	if(connect(pri->control, (struct sockaddr *) ctl_addr, 
 		   sizeof(*ctl_addr)) < 0){
-		printk("daemon_open : control connect failed, errno = %d\n",
-		       errno);
 		err = -errno;
+		printk("daemon_open : control connect failed, errno = %d\n",
+		       -err);
 		goto out;
 	}
 
 	fd = socket(AF_UNIX, SOCK_DGRAM, 0);
 	if(fd < 0){
-		printk("daemon_open : data socket failed, errno = %d\n", 
-		       errno);
 		err = -errno;
+		printk("daemon_open : data socket failed, errno = %d\n",
+		       -err);
 		goto out;
 	}
 	if(bind(fd, (struct sockaddr *) local_addr, sizeof(*local_addr)) < 0){
-		printk("daemon_open : data bind failed, errno = %d\n", 
-		       errno);
 		err = -errno;
+		printk("daemon_open : data bind failed, errno = %d\n",
+		       -err);
 		goto out_close;
 	}