From bff05058eeb94caf9acd31e32f69e71ac7206618 Mon Sep 17 00:00:00 2001
From: kettenis <kettenis@openbsd.org>
Date: Tue, 3 Aug 2010 18:26:25 +0000
Subject: [PATCH] Bring the suspend/resume code of all the Intel wireless
 drivers in line with iwn(4) again.

ok deraadt@
---
 sys/dev/pci/if_ipw.c    | 23 ++++++++++++++++++++---
 sys/dev/pci/if_ipwvar.h |  5 +++--
 sys/dev/pci/if_iwi.c    | 20 +++++++++++++++++---
 sys/dev/pci/if_iwivar.h |  5 +++--
 sys/dev/pci/if_wpi.c    |  9 +++------
 5 files changed, 46 insertions(+), 16 deletions(-)

diff --git a/sys/dev/pci/if_ipw.c b/sys/dev/pci/if_ipw.c
index d7f90e163bc..2bd64440f5d 100644
--- a/sys/dev/pci/if_ipw.c
+++ b/sys/dev/pci/if_ipw.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_ipw.c,v 1.87 2010/07/28 21:21:38 deraadt Exp $	*/
+/*	$OpenBSD: if_ipw.c,v 1.88 2010/08/03 18:26:25 kettenis Exp $	*/
 
 /*-
  * Copyright (c) 2004-2008
@@ -326,6 +326,7 @@ ipw_power(int why, void *arg)
 	struct ipw_softc *sc = arg;
 	struct ifnet *ifp = &sc->sc_ic.ic_if;
 	pcireg_t data;
+	int s;
 
 	if (why != PWR_RESUME) {
 		ipw_stop(ifp, 0);
@@ -337,8 +338,14 @@ ipw_power(int why, void *arg)
 	data &= ~0x0000ff00;
 	pci_conf_write(sc->sc_pct, sc->sc_pcitag, 0x40, data);
 
+	s = splnet();
+	sc->sc_flags |= IPW_FLAG_BUSY;
+
 	if (ifp->if_flags & IFF_UP)
 		ipw_init(ifp);
+
+	sc->sc_flags &= ~IPW_FLAG_BUSY;
+	splx(s);
 }
 
 int
@@ -1388,6 +1395,15 @@ ipw_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 	int s, error = 0;
 
 	s = splnet();
+	/*
+	 * Prevent processes from entering this function while another
+	 * process is tsleep'ing in it.
+	 */
+	if (sc->sc_flags & IPW_FLAG_BUSY) {
+		splx(s);
+		return EBUSY;
+	}
+	sc->sc_flags |= IPW_FLAG_BUSY;
 
 	switch (cmd) {
 	case SIOCSIFADDR:
@@ -1441,6 +1457,7 @@ ipw_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 		error = 0;
 	}
 
+	sc->sc_flags &= ~IPW_FLAG_BUSY;
 	splx(s);
 	return error;
 }
@@ -1504,7 +1521,7 @@ ipw_stop_master(struct ipw_softc *sc)
 	tmp = CSR_READ_4(sc, IPW_CSR_RST);
 	CSR_WRITE_4(sc, IPW_CSR_RST, tmp | IPW_RST_PRINCETON_RESET);
 
-	sc->flags &= ~IPW_FLAG_FW_INITED;
+	sc->sc_flags &= ~IPW_FLAG_FW_INITED;
 }
 
 int
@@ -2025,7 +2042,7 @@ ipw_init(struct ifnet *ifp)
 		printf("%s: could not load firmware\n", sc->sc_dev.dv_xname);
 		goto fail2;
 	}
-	sc->flags |= IPW_FLAG_FW_INITED;
+	sc->sc_flags |= IPW_FLAG_FW_INITED;
 	free(fw.data, M_DEVBUF);
 
 	/* retrieve information tables base addresses */
diff --git a/sys/dev/pci/if_ipwvar.h b/sys/dev/pci/if_ipwvar.h
index 77029a5c904..5c5d83b9abf 100644
--- a/sys/dev/pci/if_ipwvar.h
+++ b/sys/dev/pci/if_ipwvar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_ipwvar.h,v 1.19 2010/07/28 21:21:38 deraadt Exp $	*/
+/*	$OpenBSD: if_ipwvar.h,v 1.20 2010/08/03 18:26:25 kettenis Exp $	*/
 
 /*-
  * Copyright (c) 2004-2006
@@ -81,8 +81,9 @@ struct ipw_softc {
 	int				(*sc_newstate)(struct ieee80211com *,
 					    enum ieee80211_state, int);
 
-	uint32_t			flags;
+	uint32_t			sc_flags;
 #define IPW_FLAG_FW_INITED	(1 << 0)
+#define IPW_FLAG_BUSY		(1 << 1)
 
 	bus_space_tag_t			sc_st;
 	bus_space_handle_t		sc_sh;
diff --git a/sys/dev/pci/if_iwi.c b/sys/dev/pci/if_iwi.c
index 8c307a6dff4..febc0c50180 100644
--- a/sys/dev/pci/if_iwi.c
+++ b/sys/dev/pci/if_iwi.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_iwi.c,v 1.104 2010/07/28 21:21:38 deraadt Exp $	*/
+/*	$OpenBSD: if_iwi.c,v 1.105 2010/08/03 18:26:25 kettenis Exp $	*/
 
 /*-
  * Copyright (c) 2004-2008
@@ -381,8 +381,12 @@ iwi_power(int why, void *arg)
 	pci_conf_write(sc->sc_pct, sc->sc_pcitag, 0x40, data);
 
 	s = splnet();
+	sc->sc_flags |= IWI_FLAG_BUSY;
+
 	if (ifp->if_flags & IFF_UP)
 		iwi_init(ifp);
+
+	sc->sc_flags &= ~IWI_FLAG_BUSY;
 	splx(s);
 }
 
@@ -1478,6 +1482,15 @@ iwi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 	int s, error = 0;
 
 	s = splnet();
+	/*
+	 * Prevent processes from entering this function while another
+	 * process is tsleep'ing in it.
+	 */
+	if (sc->sc_flags & IWI_FLAG_BUSY) {
+		splx(s);
+		return EBUSY;
+	}
+	sc->sc_flags |= IWI_FLAG_BUSY;
 
 	switch (cmd) {
 	case SIOCSIFADDR:
@@ -1531,6 +1544,7 @@ iwi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 		error = 0;
 	}
 
+	sc->sc_flags &= ~IWI_FLAG_BUSY;
 	splx(s);
 	return error;
 }
@@ -1558,7 +1572,7 @@ iwi_stop_master(struct iwi_softc *sc)
 	tmp = CSR_READ_4(sc, IWI_CSR_RST);
 	CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_PRINCETON_RESET);
 
-	sc->flags &= ~IWI_FLAG_FW_INITED;
+	sc->sc_flags &= ~IWI_FLAG_FW_INITED;
 }
 
 int
@@ -2300,7 +2314,7 @@ iwi_init(struct ifnet *ifp)
 	}
 
 	free(data, M_DEVBUF);
-	sc->flags |= IWI_FLAG_FW_INITED;
+	sc->sc_flags |= IWI_FLAG_FW_INITED;
 
 	if ((error = iwi_config(sc)) != 0) {
 		printf("%s: device configuration failed\n",
diff --git a/sys/dev/pci/if_iwivar.h b/sys/dev/pci/if_iwivar.h
index b0c51fae01d..ecd7791dfb5 100644
--- a/sys/dev/pci/if_iwivar.h
+++ b/sys/dev/pci/if_iwivar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_iwivar.h,v 1.21 2010/07/28 21:21:38 deraadt Exp $	*/
+/*	$OpenBSD: if_iwivar.h,v 1.22 2010/08/03 18:26:25 kettenis Exp $	*/
 
 /*-
  * Copyright (c) 2004-2006
@@ -91,8 +91,9 @@ struct iwi_softc {
 	int			(*sc_newstate)(struct ieee80211com *,
 				    enum ieee80211_state, int);
 
-	uint32_t		flags;
+	uint32_t		sc_flags;
 #define IWI_FLAG_FW_INITED	(1 << 0)
+#define IWI_FLAG_BUSY		(1 << 1)
 
 	bus_dma_tag_t		sc_dmat;
 
diff --git a/sys/dev/pci/if_wpi.c b/sys/dev/pci/if_wpi.c
index 46cb8514d1c..ee754fda4cf 100644
--- a/sys/dev/pci/if_wpi.c
+++ b/sys/dev/pci/if_wpi.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_wpi.c,v 1.103 2010/07/28 21:21:38 deraadt Exp $	*/
+/*	$OpenBSD: if_wpi.c,v 1.104 2010/08/03 18:26:25 kettenis Exp $	*/
 
 /*-
  * Copyright (c) 2006-2008
@@ -438,11 +438,8 @@ wpi_power(int why, void *arg)
 	s = splnet();
 	sc->sc_flags |= WPI_FLAG_BUSY;
 
-	if (ifp->if_flags & IFF_UP) {
-		ifp->if_init(ifp);
-		if (ifp->if_flags & IFF_RUNNING)
-			ifp->if_start(ifp);
-	}
+	if (ifp->if_flags & IFF_UP)
+		wpi_init(ifp);
 
 	sc->sc_flags &= ~WPI_FLAG_BUSY;
 	splx(s);
-- 
2.20.1