From: visa <visa@openbsd.org>
Date: Wed, 17 Aug 2022 15:26:56 +0000 (+0000)
Subject: Fix vldc(4) event filters
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=ed188d6ef2504c488e4e49c3fbc1ec21fdf9910d;p=openbsd

Fix vldc(4) event filters

Indicate non-activeness when the device is not ready for reading
or writing. This should make the event filters behave more like
the old poll code.

"makes sense to me" mpi@
---

diff --git a/sys/arch/sparc64/dev/vldcp.c b/sys/arch/sparc64/dev/vldcp.c
index ca48a469b59..0757b3f8998 100644
--- a/sys/arch/sparc64/dev/vldcp.c
+++ b/sys/arch/sparc64/dev/vldcp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vldcp.c,v 1.24 2022/07/10 08:33:00 visa Exp $	*/
+/*	$OpenBSD: vldcp.c,v 1.25 2022/08/17 15:26:56 visa Exp $	*/
 /*
  * Copyright (c) 2009, 2012 Mark Kettenis
  *
@@ -617,6 +617,7 @@ filt_vldcpread(struct knote *kn, long hint)
 	} else {
 		cbus_intr_setenabled(sc->sc_bustag, sc->sc_rx_ino,
 		    INTR_ENABLED);
+		kn->kn_data = 0;
 	}
 	splx(s);
 
@@ -641,6 +642,7 @@ filt_vldcwrite(struct knote *kn, long hint)
 	} else {
 		cbus_intr_setenabled(sc->sc_bustag, sc->sc_tx_ino,
 		    INTR_ENABLED);
+		kn->kn_data = 0;
 	}
 	splx(s);