luck/tmp_suning_uos_patched
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PNP: stop using the subsystem rwsem

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The rwsem is not used to protect anything, so the use of it by the PNP
subsystem isn't really useful, and it's doubtful if it really did anything or
not.  So I've removed it.

Cc: Adam Belay <ambx1@neo.rr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2007-04-09 11:52:31 -04:00
parent 341487a837
commit 75f1115c9b
1 changed files with 0 additions and 6 deletions
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6
drivers/pnp/card.c
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@ -311,7 +311,6 @@ struct pnp_dev * pnp_request_card_device(struct pnp_card_link *clink, const char
return NULL;
found:
down_write(&dev->dev.bus->subsys.rwsem);
dev->card_link = clink;
dev->dev.driver = &drv->link.driver;
if (pnp_bus_type.probe(&dev->dev))
@ -319,14 +318,11 @@ struct pnp_dev * pnp_request_card_device(struct pnp_card_link *clink, const char
if (device_bind_driver(&dev->dev))
goto err_out;
up_write(&dev->dev.bus->subsys.rwsem);
return dev;
err_out:
dev->dev.driver = NULL;
dev->card_link = NULL;
up_write(&dev->dev.bus->subsys.rwsem);
return NULL;
}
@ -340,11 +336,9 @@ void pnp_release_card_device(struct pnp_dev * dev)
struct pnp_card_driver * drv = dev->card_link->driver;
if (!drv)
return;
down_write(&dev->dev.bus->subsys.rwsem);
drv->link.remove = &card_remove;
device_release_driver(&dev->dev);
drv->link.remove = &card_remove_first;
up_write(&dev->dev.bus->subsys.rwsem);
}
/*