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staging: brcm80211: bug fix- rmmod hang problem

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Bug fix - rmmod hang problem.
Can keep both of kthread & down_interruptible.
And in the meantime, can terminate the threads
properly during rmmod process.

Signed-off-by: Nohee Ko <noheek@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
nohee ko 2010-10-12 13:33:29 -07:00 committed by Greg Kroah-Hartman
parent c11b0ef8fe
commit af73713642
4 changed files with 27 additions and 8 deletions
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7
drivers/staging/brcm80211/brcmfmac/dhd_linux.c
View file

@ -938,6 +938,8 @@ static int _dhd_sysioc_thread(void *data)
bool in_ap = false;
#endif
allow_signal(SIGTERM);
while (down_interruptible(&dhd->sysioc_sem) == 0) {
if (kthread_should_stop())
break;
@ -1295,6 +1297,7 @@ static int dhd_watchdog_thread(void *data)
}
#endif /* DHD_SCHED */
allow_signal(SIGTERM);
/* Run until signal received */
while (1) {
if (kthread_should_stop())
@ -1360,6 +1363,7 @@ static int dhd_dpc_thread(void *data)
}
#endif /* DHD_SCHED */
allow_signal(SIGTERM);
/* Run until signal received */
while (1) {
if (kthread_should_stop())
@ -2336,17 +2340,20 @@ void dhd_detach(dhd_pub_t *dhdp)
}
if (dhd->watchdog_tsk) {
KILL_PROC(dhd->watchdog_tsk->pid, SIGTERM);
kthread_stop(dhd->watchdog_tsk);
dhd->watchdog_tsk = NULL;
}
if (dhd->dpc_tsk) {
KILL_PROC(dhd->dpc_tsk->pid, SIGTERM);
kthread_stop(dhd->dpc_tsk);
dhd->dpc_tsk = NULL;
} else
tasklet_kill(&dhd->tasklet);
if (dhd->sysioc_tsk) {
KILL_PROC(dhd->sysioc_tsk->pid, SIGTERM);
kthread_stop(dhd->sysioc_tsk);
dhd->sysioc_tsk = NULL;
}

15
drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c
View file

@ -2849,6 +2849,7 @@ static s32 wl_create_event_handler(struct wl_priv *wl)
static void wl_destroy_event_handler(struct wl_priv *wl)
{
if (wl->event_tsk) {
KILL_PROC(wl->event_tsk->pid, SIGTERM);
kthread_stop(wl->event_tsk);
wl->event_tsk = NULL;
}
@ -2860,6 +2861,7 @@ static void wl_term_iscan(struct wl_priv *wl)
if (wl->iscan_on && iscan->tsk) {
iscan->state = WL_ISCAN_STATE_IDLE;
KILL_PROC(iscan->tsk->pid, SIGTERM);
kthread_stop(iscan->tsk);
iscan->tsk = NULL;
}
@ -2994,6 +2996,7 @@ static s32 wl_iscan_thread(void *data)
int err = 0;
sched_setscheduler(current, SCHED_FIFO, &param);
allow_signal(SIGTERM);
status = WL_SCAN_RESULTS_PARTIAL;
while (likely(!down_interruptible(&iscan->sync))) {
if (kthread_should_stop())
@ -3015,6 +3018,7 @@ static s32 wl_iscan_thread(void *data)
del_timer_sync(&iscan->timer);
iscan->timer_on = 0;
}
WL_DBG(("%s was terminated\n", __func__));
return 0;
}
@ -3215,6 +3219,7 @@ static s32 wl_event_handler(void *data)
struct wl_event_q *e;
sched_setscheduler(current, SCHED_FIFO, &param);
allow_signal(SIGTERM);
while (likely(!down_interruptible(&wl->event_sync))) {
if (kthread_should_stop())
break;
@ -3232,6 +3237,7 @@ static s32 wl_event_handler(void *data)
}
wl_put_event(e);
}
WL_DBG(("%s was terminated\n", __func__));
return 0;
}
@ -3799,7 +3805,14 @@ static s32 __wl_cfg80211_down(struct wl_priv *wl)
if (wl->scan_request) {
cfg80211_scan_done(wl->scan_request, true); /* true
means abort */
wl_set_mpc(ndev, 1);
/* wl_set_mpc(wl_to_ndev(wl), 1); */ /* BUG
* this operation cannot help
* but here because sdio
* is already down through
* rmmod process.
* Need to figure out how to
* address this issue
*/
wl->scan_request = NULL;
}
clear_bit(WL_STATUS_READY, &wl->status);

2
drivers/staging/brcm80211/brcmfmac/wl_iw.c
View file

@ -1177,6 +1177,7 @@ static int _iscan_sysioc_thread(void *data)
iscan_info_t *iscan = (iscan_info_t *) data;
static bool iscan_pass_abort = false;
allow_signal(SIGTERM);
status = WL_SCAN_RESULTS_PARTIAL;
while (down_interruptible(&iscan->sysioc_sem) == 0) {
if (kthread_should_stop())
@ -3744,6 +3745,7 @@ void wl_iw_detach(void)
if (!iscan)
return;
if (iscan->sysioc_tsk) {
KILL_PROC(iscan->sysioc_tsk->pid, SIGTERM);
kthread_stop(iscan->sysioc_tsk);
iscan->sysioc_tsk = NULL;
}

11
drivers/staging/brcm80211/include/linuxver.h
View file

@ -35,14 +35,11 @@
#undef IP_TOS
#include <asm/io.h>
#define KILL_PROC(nr, sig) \
#define KILL_PROC(pid, sig) \
do { \
struct task_struct *tsk; \
struct pid *pid; \
pid = find_get_pid((pid_t)nr); \
tsk = pid_task(pid, PIDTYPE_PID); \
if (tsk) \
send_sig(sig, tsk, 1); \
tsk = pid_task(find_vpid(pid), PIDTYPE_PID); \
if (tsk) \
send_sig(sig, tsk, 1); \
} while (0)
#endif /* _linuxver_h_ */