diff options
Diffstat (limited to 'drivers/pnp/card.c')
| -rw-r--r-- | drivers/pnp/card.c | 33 |
1 files changed, 15 insertions, 18 deletions
diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c index a379a38c196c..b6a4f02b01d1 100644 --- a/drivers/pnp/card.c +++ b/drivers/pnp/card.c @@ -2,7 +2,6 @@ * card.c - contains functions for managing groups of PnP devices * * Copyright 2002 Adam Belay <ambx1@neo.rr.com> - * */ #include <linux/module.h> @@ -17,12 +16,15 @@ static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv, struct pnp_card *card) { const struct pnp_card_device_id *drv_id = drv->id_table; + while (*drv_id->id) { if (compare_pnp_id(card->id, drv_id->id)) { int i = 0; + for (;;) { int found; struct pnp_dev *dev; + if (i == PNP_MAX_DEVICES || !*drv_id->devs[i].id) return drv_id; @@ -52,6 +54,7 @@ static void card_remove(struct pnp_dev *dev) static void card_remove_first(struct pnp_dev *dev) { struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver); + if (!dev->card || !drv) return; if (drv->remove) @@ -96,12 +99,11 @@ static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv) * pnp_add_card_id - adds an EISA id to the specified card * @id: pointer to a pnp_id structure * @card: pointer to the desired card - * */ - int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card) { struct pnp_id *ptr; + if (!id) return -EINVAL; if (!card) @@ -121,6 +123,7 @@ static void pnp_free_card_ids(struct pnp_card *card) { struct pnp_id *id; struct pnp_id *next; + if (!card) return; id = card->id; @@ -134,6 +137,7 @@ static void pnp_free_card_ids(struct pnp_card *card) static void pnp_release_card(struct device *dmdev) { struct pnp_card *card = to_pnp_card(dmdev); + pnp_free_card_ids(card); kfree(card); } @@ -143,6 +147,7 @@ static ssize_t pnp_show_card_name(struct device *dmdev, { char *str = buf; struct pnp_card *card = to_pnp_card(dmdev); + str += sprintf(str, "%s\n", card->name); return (str - buf); } @@ -168,6 +173,7 @@ static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL); static int pnp_interface_attach_card(struct pnp_card *card) { int rc = device_create_file(&card->dev, &dev_attr_name); + if (rc) return rc; @@ -186,11 +192,11 @@ static int pnp_interface_attach_card(struct pnp_card *card) * pnp_add_card - adds a PnP card to the PnP Layer * @card: pointer to the card to add */ - int pnp_add_card(struct pnp_card *card) { int error; struct list_head *pos, *temp; + if (!card || !card->protocol) return -EINVAL; @@ -233,10 +239,10 @@ int pnp_add_card(struct pnp_card *card) * pnp_remove_card - removes a PnP card from the PnP Layer * @card: pointer to the card to remove */ - void pnp_remove_card(struct pnp_card *card) { struct list_head *pos, *temp; + if (!card) return; device_unregister(&card->dev); @@ -255,7 +261,6 @@ void pnp_remove_card(struct pnp_card *card) * @card: pointer to the card to add to * @dev: pointer to the device to add */ - int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev) { if (!card || !dev || !dev->protocol) @@ -275,7 +280,6 @@ int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev) * pnp_remove_card_device- removes a device from the specified card * @dev: pointer to the device to remove */ - void pnp_remove_card_device(struct pnp_dev *dev) { spin_lock(&pnp_lock); @@ -291,7 +295,6 @@ void pnp_remove_card_device(struct pnp_dev *dev) * @id: pointer to a PnP ID structure that explains the rules for finding the device * @from: Starting place to search from. If NULL it will start from the begining. */ - struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { @@ -299,6 +302,7 @@ struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, struct pnp_dev *dev; struct pnp_card_driver *drv; struct pnp_card *card; + if (!clink || !id) goto done; card = clink->card; @@ -340,10 +344,10 @@ struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, * pnp_release_card_device - call this when the driver no longer needs the device * @dev: pointer to the PnP device stucture */ - void pnp_release_card_device(struct pnp_dev *dev) { struct pnp_card_driver *drv = dev->card_link->driver; + if (!drv) return; drv->link.remove = &card_remove; @@ -357,6 +361,7 @@ void pnp_release_card_device(struct pnp_dev *dev) static int card_suspend(struct pnp_dev *dev, pm_message_t state) { struct pnp_card_link *link = dev->card_link; + if (link->pm_state.event == state.event) return 0; link->pm_state = state; @@ -366,6 +371,7 @@ static int card_suspend(struct pnp_dev *dev, pm_message_t state) static int card_resume(struct pnp_dev *dev) { struct pnp_card_link *link = dev->card_link; + if (link->pm_state.event == PM_EVENT_ON) return 0; link->pm_state = PMSG_ON; @@ -377,7 +383,6 @@ static int card_resume(struct pnp_dev *dev) * pnp_register_card_driver - registers a PnP card driver with the PnP Layer * @drv: pointer to the driver to register */ - int pnp_register_card_driver(struct pnp_card_driver *drv) { int error; @@ -411,7 +416,6 @@ int pnp_register_card_driver(struct pnp_card_driver *drv) * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer * @drv: pointer to the driver to unregister */ - void pnp_unregister_card_driver(struct pnp_card_driver *drv) { spin_lock(&pnp_lock); @@ -420,13 +424,6 @@ void pnp_unregister_card_driver(struct pnp_card_driver *drv) pnp_unregister_driver(&drv->link); } -#if 0 -EXPORT_SYMBOL(pnp_add_card); -EXPORT_SYMBOL(pnp_remove_card); -EXPORT_SYMBOL(pnp_add_card_device); -EXPORT_SYMBOL(pnp_remove_card_device); -EXPORT_SYMBOL(pnp_add_card_id); -#endif /* 0 */ EXPORT_SYMBOL(pnp_request_card_device); EXPORT_SYMBOL(pnp_release_card_device); EXPORT_SYMBOL(pnp_register_card_driver); |