From: Ben Gras <ben@minix3.org>
Date: Wed, 15 Mar 2006 21:55:32 +0000 (+0000)
Subject: Driver disappearing during dev_io() is not a fatal error.
X-Git-Tag: v3.1.2a~220
X-Git-Url: http://zhaoyanbai.com/repos/man.nsupdate.html?a=commitdiff_plain;h=6e7ba75acb4e047da93b42e32374c196d65c9fd8;p=minix.git

Driver disappearing during dev_io() is not a fatal error.
---

diff --git a/servers/fs/device.c b/servers/fs/device.c
index 72ba958d8..831713ed4 100644
--- a/servers/fs/device.c
+++ b/servers/fs/device.c
@@ -160,8 +160,10 @@ int flags;			/* special flags, like O_NONBLOCK */
   /* Call the task. */
   (*dp->dmap_io)(dp->dmap_driver, &dev_mess);
 
-  if(dp->dmap_driver == NONE)
-	panic(__FILE__,"dev_io: driver changed to NONE", NO_NUM);
+  if(dp->dmap_driver == NONE) {
+  	/* Driver has vanished. */
+	return EIO;
+  }
 
   /* Task has completed.  See if call completed. */
   if (dev_mess.REP_STATUS == SUSPEND) {