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PNP: simplify PNP card error handling

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No functional change; just return errors early instead of putting the main
part of the function inside an "if" statement.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Adam Belay <ambx1@neo.rr.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bjorn Helgaas 2007-10-16 23:31:09 -07:00 committed by Linus Torvalds
parent 402b310cb6
commit 5bfc43a0b6
1 changed files with 29 additions and 28 deletions
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57
drivers/pnp/card.c
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@ -197,33 +197,34 @@ int pnp_add_card(struct pnp_card *card)
card->dev.bus = NULL;
card->dev.release = &pnp_release_card;
error = device_register(&card->dev);
if (error == 0) {
pnp_interface_attach_card(card);
spin_lock(&pnp_lock);
list_add_tail(&card->global_list, &pnp_cards);
list_add_tail(&card->protocol_list, &card->protocol->cards);
spin_unlock(&pnp_lock);
/* we wait until now to add devices in order to ensure the drivers
* will be able to use all of the related devices on the card
* without waiting any unresonable length of time */
list_for_each(pos, &card->devices) {
struct pnp_dev *dev = card_to_pnp_dev(pos);
__pnp_add_device(dev);
}
/* match with card drivers */
list_for_each_safe(pos, temp, &pnp_card_drivers) {
struct pnp_card_driver *drv =
list_entry(pos, struct pnp_card_driver,
global_list);
card_probe(card, drv);
}
} else
if (error) {
pnp_err("sysfs failure, card '%s' will be unavailable",
card->dev.bus_id);
return error;
return error;
}
pnp_interface_attach_card(card);
spin_lock(&pnp_lock);
list_add_tail(&card->global_list, &pnp_cards);
list_add_tail(&card->protocol_list, &card->protocol->cards);
spin_unlock(&pnp_lock);
/* we wait until now to add devices in order to ensure the drivers
* will be able to use all of the related devices on the card
* without waiting an unreasonable length of time */
list_for_each(pos, &card->devices) {
struct pnp_dev *dev = card_to_pnp_dev(pos);
__pnp_add_device(dev);
}
/* match with card drivers */
list_for_each_safe(pos, temp, &pnp_card_drivers) {
struct pnp_card_driver *drv =
list_entry(pos, struct pnp_card_driver,
global_list);
card_probe(card, drv);
}
return 0;
}
/**
@ -291,14 +292,15 @@ struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
struct pnp_card *card;
if (!clink || !id)
goto done;
return NULL;
card = clink->card;
drv = clink->driver;
if (!from) {
pos = card->devices.next;
} else {
if (from->card != card)
goto done;
return NULL;
pos = from->card_list.next;
}
while (pos != &card->devices) {
@ -308,7 +310,6 @@ struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
pos = pos->next;
}
done:
return NULL;
found: