diff options
Diffstat (limited to 'drivers/pcmcia/ds.c')
| -rw-r--r-- | drivers/pcmcia/ds.c | 76 |
1 files changed, 32 insertions, 44 deletions
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c index cb6036d89e5..508f94a2a78 100644 --- a/drivers/pcmcia/ds.c +++ b/drivers/pcmcia/ds.c @@ -335,7 +335,6 @@ static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *le mutex_lock(&s->ops_mutex); list_del(&p_dev->socket_device_list); - p_dev->_removed = 1; mutex_unlock(&s->ops_mutex); dev_dbg(&p_dev->dev, "unregistering device\n"); @@ -654,14 +653,7 @@ static int pcmcia_requery_callback(struct device *dev, void * _data) static void pcmcia_requery(struct pcmcia_socket *s) { - int present, has_pfc; - - mutex_lock(&s->ops_mutex); - present = s->pcmcia_state.present; - mutex_unlock(&s->ops_mutex); - - if (!present) - return; + int has_pfc; if (s->functions == 0) { pcmcia_card_add(s); @@ -687,12 +679,10 @@ static void pcmcia_requery(struct pcmcia_socket *s) new_funcs = mfc.nfn; else new_funcs = 1; - if (old_funcs > new_funcs) { + if (old_funcs != new_funcs) { + /* we need to re-start */ pcmcia_card_remove(s, NULL); pcmcia_card_add(s); - } else if (new_funcs > old_funcs) { - s->functions = new_funcs; - pcmcia_device_add(s, 1); } } @@ -728,6 +718,8 @@ static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) struct pcmcia_socket *s = dev->socket; const struct firmware *fw; int ret = -ENOMEM; + cistpl_longlink_mfc_t mfc; + int old_funcs, new_funcs = 1; if (!filename) return -EINVAL; @@ -750,6 +742,14 @@ static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) goto release; } + /* we need to re-start if the number of functions changed */ + old_funcs = s->functions; + if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, + &mfc)) + new_funcs = mfc.nfn; + + if (old_funcs != new_funcs) + ret = -EBUSY; /* update information */ pcmcia_device_query(dev); @@ -820,11 +820,12 @@ static inline int pcmcia_devmatch(struct pcmcia_device *dev, } if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { - if (dev->device_no != did->device_no) - return 0; + dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n"); mutex_lock(&dev->socket->ops_mutex); dev->socket->pcmcia_state.has_pfc = 1; mutex_unlock(&dev->socket->ops_mutex); + if (dev->device_no != did->device_no) + return 0; } if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { @@ -835,7 +836,7 @@ static inline int pcmcia_devmatch(struct pcmcia_device *dev, /* if this is a pseudo-multi-function device, * we need explicit matches */ - if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) + if (dev->socket->pcmcia_state.has_pfc) return 0; if (dev->device_no) return 0; @@ -858,10 +859,8 @@ static inline int pcmcia_devmatch(struct pcmcia_device *dev, if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { dev_dbg(&dev->dev, "device needs a fake CIS\n"); if (!dev->socket->fake_cis) - pcmcia_load_firmware(dev, did->cisfile); - - if (!dev->socket->fake_cis) - return 0; + if (pcmcia_load_firmware(dev, did->cisfile)) + return 0; } if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { @@ -1254,9 +1253,7 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) switch (event) { case CS_EVENT_CARD_REMOVAL: - mutex_lock(&s->ops_mutex); - s->pcmcia_state.present = 0; - mutex_unlock(&s->ops_mutex); + atomic_set(&skt->present, 0); pcmcia_card_remove(skt, NULL); handle_event(skt, event); mutex_lock(&s->ops_mutex); @@ -1265,9 +1262,9 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) break; case CS_EVENT_CARD_INSERTION: + atomic_set(&skt->present, 1); mutex_lock(&s->ops_mutex); s->pcmcia_state.has_pfc = 0; - s->pcmcia_state.present = 1; destroy_cis_cache(s); /* to be on the safe side... */ mutex_unlock(&s->ops_mutex); pcmcia_card_add(skt); @@ -1307,7 +1304,13 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) return 0; } /* ds_event */ - +/* + * NOTE: This is racy. There's no guarantee the card will still be + * physically present, even if the call to this function returns + * non-NULL. Furthermore, the device driver most likely is unbound + * almost immediately, so the timeframe where pcmcia_dev_present + * returns NULL is probably really really small. + */ struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) { struct pcmcia_device *p_dev; @@ -1317,22 +1320,9 @@ struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) if (!p_dev) return NULL; - mutex_lock(&p_dev->socket->ops_mutex); - if (!p_dev->socket->pcmcia_state.present) - goto out; - - if (p_dev->socket->pcmcia_state.dead) - goto out; - - if (p_dev->_removed) - goto out; - - if (p_dev->suspended) - goto out; + if (atomic_read(&p_dev->socket->present) != 0) + ret = p_dev; - ret = p_dev; - out: - mutex_unlock(&p_dev->socket->ops_mutex); pcmcia_put_dev(p_dev); return ret; } @@ -1382,6 +1372,8 @@ static int __devinit pcmcia_bus_add_socket(struct device *dev, return ret; } + atomic_set(&socket->present, 0); + return 0; } @@ -1393,10 +1385,6 @@ static void pcmcia_bus_remove_socket(struct device *dev, if (!socket) return; - mutex_lock(&socket->ops_mutex); - socket->pcmcia_state.dead = 1; - mutex_unlock(&socket->ops_mutex); - pccard_register_pcmcia(socket, NULL); /* unregister any unbound devices */ |