IPMI panic

[Paolo Galtieri <pgaltieri@mvista.com>]

Oops,
  brain fade - forgot the Signed-of-by.  Resent as requested
by Corey Minyard.

Folks,
  while doing some testing I discovered that if the BIOS on a
board does not properly setup the DMI information it leads to 
a panic in the IPMI code.  The panic is due to dereferencing 
a pointer which is not initialized.  The pointer is initialized
in port_setup() and/or mem_setup() and used in init_one_smi() and
cleanup_one_si(), however if either port_setup() or mem_setup()
return ENODEV the pointer does not get initialized.  The patch
is below done against 2.6.15-rc5-git4

Paolo

Signed-off-by: Paolo Galtieri <pgaltieri@mvista.com>

--- linux-2.6.15-rc5/drivers/char/ipmi/ipmi_si_intf.c	2005-12-05
10:02:56.000000000 -0700
+++ new-linux-2.6.15-rc5/drivers/char/ipmi/ipmi_si_intf.c	2005-12-14
13:57:02.000000000 -0700
@@ -2399,7 +2399,8 @@
 			new_smi->handlers->cleanup(new_smi->si_sm);
 		kfree(new_smi->si_sm);
 	}
-	new_smi->io_cleanup(new_smi);
+	if (new_smi->io_cleanup)
+		new_smi->io_cleanup(new_smi);
 
 	return rv;
 }
@@ -2518,7 +2519,8 @@
 
 	kfree(to_clean->si_sm);
 
-	to_clean->io_cleanup(to_clean);
+	if (to_clean->io_cleanup)
+		to_clean->io_cleanup(to_clean);
 }
 
 static __exit void cleanup_ipmi_si(void)