ipmi/of: Don't use unavailable interfaces

If an IPMI controller is used by the firmware and as such marked with
a reserved status, we shouldn't use it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 5d665680ae33..4fc89310bfb5 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -2658,6 +2658,9 @@ static int ipmi_probe(struct platform_device *dev)
         if (!match)
                 return -EINVAL;
 
+        if (!of_device_is_available(np))
+                return -EINVAL;
+
         ret = of_address_to_resource(np, 0, &resource);
         if (ret) {
                 dev_warn(&dev->dev, PFX "invalid address from OF\n");