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ipmi(4): Tidy up ipmi_thread a little. 

- Join on detach -- don't free anything until thread has exited; thread
  may still be using stuff.
- Nix dead error branch -- malloc(M_WAITOK) cannot fail.
- x = malloc(sizeof(x[0]) * n), not x = malloc(sizeof(type_t) * n)
This commit is contained in:
riastradh 2021-06-15 00:20:33 +00:00
parent 704c2ad3c7
commit 76313cf46e
1 changed files with 7 additions and 10 deletions
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17
sys/dev/ipmi.c
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@ -1,4 +1,4 @@
/* $NetBSD: ipmi.c,v 1.8 2021/06/14 22:00:10 riastradh Exp $ */
/* $NetBSD: ipmi.c,v 1.9 2021/06/15 00:20:33 riastradh Exp $ */
/*
* Copyright (c) 2019 Michael van Elst
@ -76,7 +76,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ipmi.c,v 1.8 2021/06/14 22:00:10 riastradh Exp $");
__KERNEL_RCSID(0, "$NetBSD: ipmi.c,v 1.9 2021/06/15 00:20:33 riastradh Exp $");
#include <sys/types.h>
#include <sys/param.h>
@ -1984,13 +1984,8 @@ ipmi_thread(void *cookie)
break;
/* allocate and fill sensor arrays */
sc->sc_sensor =
malloc(sizeof(envsys_data_t) * sc->sc_nsensors,
M_DEVBUF, M_WAITOK | M_ZERO);
if (sc->sc_sensor == NULL) {
aprint_error_dev(self, "can't allocate envsys_data_t\n");
kthread_exit(0);
}
sc->sc_sensor = malloc(sizeof(sc->sc_sensor[0]) * sc->sc_nsensors,
M_DEVBUF, M_WAITOK | M_ZERO);
sc->sc_envsys = sysmon_envsys_create();
sc->sc_envsys->sme_cookie = sc;
@ -2132,7 +2127,7 @@ ipmi_attach(device_t parent, device_t self, void *aux)
cv_init(&sc->sc_poll_cv, "ipmipoll");
cv_init(&sc->sc_mode_cv, "ipmimode");
if (kthread_create(PRI_NONE, 0, NULL, ipmi_thread, self,
if (kthread_create(PRI_NONE, KTHREAD_MUSTJOIN, NULL, ipmi_thread, self,
&sc->sc_kthread, "%s", device_xname(self)) != 0) {
aprint_error_dev(self, "unable to create thread, disabled\n");
} else
@ -2150,6 +2145,8 @@ ipmi_detach(device_t self, int flags)
sc->sc_thread_running = false;
cv_signal(&sc->sc_poll_cv);
mutex_exit(&sc->sc_poll_mtx);
if (sc->sc_kthread)
(void)kthread_join(sc->sc_kthread);
if ((rc = sysmon_wdog_unregister(&sc->sc_wdog)) != 0) {
if (rc == ERESTART)