openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

pcmcia: simplify event callback 

The event callback for handling 16bit PCMCIA cards only needs to be
informed about a few events. Furthermore, send_event may already
only be called with skt->skt_mutex held, which also protects against
the module being removed behind the callback's back.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski 2010-07-11 10:04:59 +02:00
parent 5716d415f8
commit 216d7cdd3b
2 changed files with 10 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
drivers/pcmcia/cs.c
View File

@ -264,8 +264,6 @@ EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
static int send_event(struct pcmcia_socket *s, event_t event, int priority)
{
int ret;
if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL))
return 0;
@ -274,14 +272,8 @@ static int send_event(struct pcmcia_socket *s, event_t event, int priority)
if (!s->callback)
return 0;
if (!try_module_get(s->callback->owner))
return 0;
ret = s->callback->event(s, event, priority);
module_put(s->callback->owner);
return ret;
return s->callback->event(s, event, priority);
}
static int socket_reset(struct pcmcia_socket *skt)
@ -494,7 +486,6 @@ static int socket_suspend(struct pcmcia_socket *skt)
mutex_lock(&skt->ops_mutex);
skt->suspended_state = skt->state;
send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
skt->socket = dead_socket;
skt->ops->set_socket(skt, &skt->socket);
if (skt->ops->suspend)
@ -654,16 +645,8 @@ static int pccardd(void *__skt)
spin_unlock_irqrestore(&skt->thread_lock, flags);
mutex_lock(&skt->skt_mutex);
if (events) {
if (events & SS_DETECT)
socket_detect_change(skt);
if (events & SS_BATDEAD)
send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
if (events & SS_BATWARN)
send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
if (events & SS_READY)
send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
}
if (events & SS_DETECT)
socket_detect_change(skt);
if (sysfs_events) {
if (sysfs_events & PCMCIA_UEVENT_EJECT)
@ -823,20 +806,13 @@ int pcmcia_reset_card(struct pcmcia_socket *skt)
break;
}
ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
if (ret == 0) {
send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
if (skt->callback)
skt->callback->suspend(skt);
mutex_lock(&skt->ops_mutex);
ret = socket_reset(skt);
mutex_unlock(&skt->ops_mutex);
if (ret == 0) {
send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
if (skt->callback)
skt->callback->resume(skt);
}
}
if (skt->callback)
skt->callback->suspend(skt);
mutex_lock(&skt->ops_mutex);
ret = socket_reset(skt);
mutex_unlock(&skt->ops_mutex);
if ((ret == 0) && (skt->callback))
skt->callback->resume(skt);
ret = 0;
} while (0);

6
drivers/pcmcia/ds.c
View File

@ -1253,9 +1253,6 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
pcmcia_card_add(skt);
break;
case CS_EVENT_EJECTION_REQUEST:
break;
case CS_EVENT_PM_RESUME:
if (verify_cis_cache(skt) != 0) {
dev_dbg(&skt->dev, "cis mismatch - different card\n");
@ -1273,9 +1270,6 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
}
break;
case CS_EVENT_PM_SUSPEND:
case CS_EVENT_RESET_PHYSICAL:
case CS_EVENT_CARD_RESET:
default:
break;
}