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authorPhilipp Reisner <philipp.reisner@linbit.com>2007-03-07 12:55:39 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-03-07 16:08:08 -0800
commit05e52dd7396514648fba6c275eb7b49eca333c6d (patch)
tree144ecb4d6986128773e6d5aad4e9aae52ce554d1
parent151a99317ee9efcfd3e642da62e1edf4f47fcb3e (diff)
downloadblackbird-op-linux-05e52dd7396514648fba6c275eb7b49eca333c6d.tar.gz
blackbird-op-linux-05e52dd7396514648fba6c275eb7b49eca333c6d.zip
[CONNECTOR]: Bugfix for cn_call_callback()
When system under heavy stress and must allocate new work instead of reusing old one, new work must use correct completion callback. Patch is based on Philipp's and Lars' work. I only cleaned small stuff (and removed spaces instead of tabs). Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/connector/connector.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c
index a44db75bc25b..a905f7820331 100644
--- a/drivers/connector/connector.c
+++ b/drivers/connector/connector.c
@@ -128,7 +128,7 @@ EXPORT_SYMBOL_GPL(cn_netlink_send);
*/
static int cn_call_callback(struct cn_msg *msg, void (*destruct_data)(void *), void *data)
{
- struct cn_callback_entry *__cbq;
+ struct cn_callback_entry *__cbq, *__new_cbq;
struct cn_dev *dev = &cdev;
int err = -ENODEV;
@@ -148,27 +148,27 @@ static int cn_call_callback(struct cn_msg *msg, void (*destruct_data)(void *), v
} else {
struct cn_callback_data *d;
- __cbq = kzalloc(sizeof(*__cbq), GFP_ATOMIC);
- if (__cbq) {
- d = &__cbq->data;
+ err = -ENOMEM;
+ __new_cbq = kzalloc(sizeof(struct cn_callback_entry), GFP_ATOMIC);
+ if (__new_cbq) {
+ d = &__new_cbq->data;
d->callback_priv = msg;
d->callback = __cbq->data.callback;
d->ddata = data;
d->destruct_data = destruct_data;
- d->free = __cbq;
+ d->free = __new_cbq;
- INIT_WORK(&__cbq->work,
+ INIT_WORK(&__new_cbq->work,
&cn_queue_wrapper);
-
+
if (queue_work(dev->cbdev->cn_queue,
- &__cbq->work))
+ &__new_cbq->work))
err = 0;
else {
- kfree(__cbq);
+ kfree(__new_cbq);
err = -EINVAL;
}
- } else
- err = -ENOMEM;
+ }
}
break;
}
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