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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 10 Sep 2010 12:55:36 +0000 (UTC)
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Subject: svn commit: r212415 - stable/8/sys/kern
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Author: kib
Date: Fri Sep 10 12:55:36 2010
New Revision: 212415
URL: http://svn.freebsd.org/changeset/base/212415

Log:
  MFC r211941:
  Recalcule the return value in pollout().
  
  PR:	kern/143029
  Tested by:	John Plevyak <jplevyak apache org>

Modified:
  stable/8/sys/kern/sys_generic.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/xen/xenpci/   (props changed)

Modified: stable/8/sys/kern/sys_generic.c
==============================================================================
--- stable/8/sys/kern/sys_generic.c	Fri Sep 10 12:16:24 2010	(r212414)
+++ stable/8/sys/kern/sys_generic.c	Fri Sep 10 12:55:36 2010	(r212415)
@@ -76,7 +76,8 @@ static MALLOC_DEFINE(M_IOCTLOPS, "ioctlo
 static MALLOC_DEFINE(M_SELECT, "select", "select() buffer");
 MALLOC_DEFINE(M_IOV, "iov", "large iov's");
 
-static int	pollout(struct pollfd *, struct pollfd *, u_int);
+static int	pollout(struct thread *, struct pollfd *, struct pollfd *,
+		    u_int);
 static int	pollscan(struct thread *, struct pollfd *, u_int);
 static int	pollrescan(struct thread *);
 static int	selscan(struct thread *, fd_mask **, fd_mask **, int);
@@ -1207,7 +1208,7 @@ done:
 	if (error == EWOULDBLOCK)
 		error = 0;
 	if (error == 0) {
-		error = pollout(bits, uap->fds, nfds);
+		error = pollout(td, bits, uap->fds, nfds);
 		if (error)
 			goto out;
 	}
@@ -1262,22 +1263,27 @@ pollrescan(struct thread *td)
 
 
 static int
-pollout(fds, ufds, nfd)
+pollout(td, fds, ufds, nfd)
+	struct thread *td;
 	struct pollfd *fds;
 	struct pollfd *ufds;
 	u_int nfd;
 {
 	int error = 0;
 	u_int i = 0;
+	u_int n = 0;
 
 	for (i = 0; i < nfd; i++) {
 		error = copyout(&fds->revents, &ufds->revents,
 		    sizeof(ufds->revents));
 		if (error)
 			return (error);
+		if (fds->revents != 0)
+			n++;
 		fds++;
 		ufds++;
 	}
+	td->td_retval[0] = n;
 	return (0);
 }