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| author | Christian Krafft <krafft@de.ibm.com> | 2007-04-23 21:35:43 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@klappe.arndb.de> | 2007-04-23 21:44:40 +0200 |
| commit | 79baf4a60e8aceb2b8a5bed8575885499cb21ce4 (patch) | |
| tree | be23358bee3fc9094485b574cea06201f470ad0b /arch/powerpc | |
| parent | 5050063c0464663a0b0c3dc9fc5bc822aa74a1dd (diff) | |
| download | linux-rt-79baf4a60e8aceb2b8a5bed8575885499cb21ce4.tar.gz | |
[POWERPC] add check for initialized driver data to pmi driver
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>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/sysdev/pmi.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/powerpc/sysdev/pmi.c b/arch/powerpc/sysdev/pmi.c index a5282011d39e..0b53fed8a9b1 100644 --- a/arch/powerpc/sysdev/pmi.c +++ b/arch/powerpc/sysdev/pmi.c @@ -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); @@ -289,10 +292,12 @@ void pmi_unregister_handler(struct of_device *device, struct pmi_handler *handler) { struct pmi_data *data; + data = device->dev.driver_data; - pr_debug("pmi: unregistering handler %p\n", handler); + if (!data) + return; - data = device->dev.driver_data; + pr_debug("pmi: unregistering handler %p\n", handler); spin_lock(&data->handler_spinlock); list_del(&handler->node); |