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hold the lock for struct ixl_softc during read or write to sc->sc_media_*

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OKed by knakahara@n.o
This commit is contained in:
yamaguchi 2020-03-12 09:38:10 +00:00
parent ad58ea6187
commit 46c80a8520
1 changed files with 26 additions and 12 deletions
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38
sys/dev/pci/if_ixl.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_ixl.c,v 1.61 2020/03/12 09:34:41 yamaguchi Exp $ */
/* $NetBSD: if_ixl.c,v 1.62 2020/03/12 09:38:10 yamaguchi Exp $ */
/*
* Copyright (c) 2013-2015, Intel Corporation
@ -74,7 +74,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_ixl.c,v 1.61 2020/03/12 09:34:41 yamaguchi Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_ixl.c,v 1.62 2020/03/12 09:38:10 yamaguchi Exp $");
#ifdef _KERNEL_OPT
#include "opt_net_mpsafe.h"
@ -800,7 +800,7 @@ static void ixl_get_link_status(void *);
static int ixl_get_link_status_poll(struct ixl_softc *, int *);
static void ixl_get_link_status_done(struct ixl_softc *,
const struct ixl_aq_desc *);
static int ixl_set_link_status(struct ixl_softc *,
static int ixl_set_link_status_locked(struct ixl_softc *,
const struct ixl_aq_desc *);
static uint64_t ixl_search_link_speed(uint8_t);
static uint8_t ixl_search_baudrate(uint64_t);
@ -1686,8 +1686,10 @@ ixl_media_status(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct ixl_softc *sc = ifp->if_softc;
mutex_enter(&sc->sc_cfg_lock);
ifmr->ifm_status = sc->sc_media_status;
ifmr->ifm_active = sc->sc_media_active;
mutex_exit(&sc->sc_cfg_lock);
}
static int
@ -3645,8 +3647,17 @@ static void
ixl_get_link_status_done(struct ixl_softc *sc,
const struct ixl_aq_desc *iaq)
{
struct ixl_aq_desc iaq_buf;
ixl_link_state_update(sc, iaq);
memcpy(&iaq_buf, iaq, sizeof(iaq_buf));
/*
* The lock can be released here
* because there is no post processing about ATQ
*/
mutex_exit(&sc->sc_atq_lock);
ixl_link_state_update(sc, &iaq_buf);
mutex_enter(&sc->sc_atq_lock);
}
static void
@ -3666,11 +3677,12 @@ ixl_get_link_status(void *xsc)
param->notify = IXL_AQ_LINK_NOTIFY;
error = ixl_atq_exec_locked(sc, &sc->sc_link_state_atq);
ixl_atq_set(&sc->sc_link_state_atq, ixl_get_link_status_done);
if (error == 0) {
ixl_get_link_status_done(sc, iaq);
}
ixl_atq_set(&sc->sc_link_state_atq, ixl_get_link_status_done);
mutex_exit(&sc->sc_atq_lock);
}
@ -3681,15 +3693,17 @@ ixl_link_state_update(struct ixl_softc *sc, const struct ixl_aq_desc *iaq)
struct ifnet *ifp = &sc->sc_ec.ec_if;
int link_state;
KASSERT(kpreempt_disabled());
link_state = ixl_set_link_status(sc, iaq);
mutex_enter(&sc->sc_cfg_lock);
link_state = ixl_set_link_status_locked(sc, iaq);
mutex_exit(&sc->sc_cfg_lock);
if (ifp->if_link_state != link_state)
if_link_state_change(ifp, link_state);
if (link_state != LINK_STATE_DOWN) {
kpreempt_disable();
if_schedule_deferred_start(ifp);
kpreempt_enable();
}
}
@ -3751,9 +3765,7 @@ ixl_arq(void *xsc)
switch (iaq->iaq_opcode) {
case htole16(IXL_AQ_OP_PHY_LINK_STATUS):
kpreempt_disable();
ixl_link_state_update(sc, iaq);
kpreempt_enable();
break;
}
@ -4500,7 +4512,8 @@ ixl_get_link_status_poll(struct ixl_softc *sc, int *l)
return EIO;
}
link = ixl_set_link_status(sc, &iaq);
/* It is unneccessary to hold lock */
link = ixl_set_link_status_locked(sc, &iaq);
if (l != NULL)
*l = link;
@ -5690,7 +5703,7 @@ out:
}
static int
ixl_set_link_status(struct ixl_softc *sc, const struct ixl_aq_desc *iaq)
ixl_set_link_status_locked(struct ixl_softc *sc, const struct ixl_aq_desc *iaq)
{
const struct ixl_aq_link_status *status;
const struct ixl_phy_type *itype;
@ -5722,6 +5735,7 @@ ixl_set_link_status(struct ixl_softc *sc, const struct ixl_aq_desc *iaq)
baudrate = ixl_search_link_speed(status->link_speed);
done:
/* sc->sc_cfg_lock held expect during attach */
sc->sc_media_active = ifm_active;
sc->sc_media_status = ifm_status;