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agp: correct missing cleanup on error in agp_add_bridge 

While investigating a kmemleak detected leak, I encountered the
agp_add_bridge function.  It appears to be responsible for freeing
the agp_bridge_data in the case of a failure, but it is only doing
so for some errors.

Fix it to always free the bridge data if a failure condition is
encountered.

Signed-off-by: Kevin Winchester <kjwinchester@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Kevin Winchester 2009-11-17 14:38:45 -08:00 committed by Dave Airlie
parent 22763c5cf3
commit 3f50b0222e
1 changed files with 9 additions and 4 deletions
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13
drivers/char/agp/backend.c
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@ -285,18 +285,22 @@ int agp_add_bridge(struct agp_bridge_data *bridge)
{
int error;
if (agp_off)
return -ENODEV;
if (agp_off) {
error = -ENODEV;
goto err_put_bridge;
}
if (!bridge->dev) {
printk (KERN_DEBUG PFX "Erk, registering with no pci_dev!\n");
return -EINVAL;
error = -EINVAL;
goto err_put_bridge;
}
/* Grab reference on the chipset driver. */
if (!try_module_get(bridge->driver->owner)) {
dev_info(&bridge->dev->dev, "can't lock chipset driver\n");
return -EINVAL;
error = -EINVAL;
goto err_put_bridge;
}
error = agp_backend_initialize(bridge);
@ -326,6 +330,7 @@ frontend_err:
agp_backend_cleanup(bridge);
err_out:
module_put(bridge->driver->owner);
err_put_bridge:
agp_put_bridge(bridge);
return error;
}