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[POWERPC] add check for initialized driver data to pmi driver

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This patch adds a check for the private driver data to be initialized.
The bug showed up, as the caller found a pmi device by it's type.
Whereas the pmi driver probes for the type and the name.
Since the name was not as the driver expected, it did not initialize.
A more relaxed probing will be supplied with an extra patch, too.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Christian Krafft 2007-04-23 21:35:43 +02:00 committed by Arnd Bergmann
parent 5050063c04
commit 79baf4a60e
1 changed files with 7 additions and 2 deletions
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9
arch/powerpc/sysdev/pmi.c
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@ -279,6 +279,9 @@ void pmi_register_handler(struct of_device *device,
struct pmi_data *data;
data = device->dev.driver_data;
if (!data)
return;
spin_lock(&data->handler_spinlock);
list_add_tail(&handler->node, &data->handler);
spin_unlock(&data->handler_spinlock);
@ -289,11 +292,13 @@ void pmi_unregister_handler(struct of_device *device,
struct pmi_handler *handler)
{
struct pmi_data *data;
data = device->dev.driver_data;
if (!data)
return;
pr_debug("pmi: unregistering handler %p\n", handler);
data = device->dev.driver_data;
spin_lock(&data->handler_spinlock);
list_del(&handler->node);
spin_unlock(&data->handler_spinlock);