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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sat, 23 Jan 2016 07:33:02 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org
Subject: svn commit: r294618 - stable/10/sys/fs/devfs
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Author: kib
Date: Sat Jan 23 07:33:02 2016
New Revision: 294618
URL: https://svnweb.freebsd.org/changeset/base/294618

Log:
  MFC r293059:
  Hide transient EBADF errors caused by the parallel revoke(2) or forced
  unmount of devfs mounts, by restarting the failed syscall.

Modified:
  stable/10/sys/fs/devfs/devfs_vnops.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/fs/devfs/devfs_vnops.c
==============================================================================
--- stable/10/sys/fs/devfs/devfs_vnops.c	Sat Jan 23 05:27:55 2016	(r294617)
+++ stable/10/sys/fs/devfs/devfs_vnops.c	Sat Jan 23 07:33:02 2016	(r294618)
@@ -239,18 +239,18 @@ devfs_populate_vp(struct vnode *vp)
 	if (DEVFS_DMP_DROP(dmp)) {
 		sx_xunlock(&dmp->dm_lock);
 		devfs_unmount_final(dmp);
-		return (EBADF);
+		return (ERESTART);
 	}
 	if ((vp->v_iflag & VI_DOOMED) != 0) {
 		sx_xunlock(&dmp->dm_lock);
-		return (EBADF);
+		return (ERESTART);
 	}
 	de = vp->v_data;
 	KASSERT(de != NULL,
 	    ("devfs_populate_vp: vp->v_data == NULL but vnode not doomed"));
 	if ((de->de_flags & DE_DOOMED) != 0) {
 		sx_xunlock(&dmp->dm_lock);
-		return (EBADF);
+		return (ERESTART);
 	}
 
 	return (0);