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>

diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index 976d807..5ea1967 100644 (file)
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -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);

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index d2ec458..bd58650 100644 (file)
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -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;
     }