Aug 03 2010

powerpc/powermac: Drop unnecessary of_node_put 

Author: Julia Lawall <julia@diku.dk>

for_each_node_by_name only exits when its first argument is NULL, and a
subsequent call to of_node_put on that argument is unnecessary.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// 
@@
iterator name for_each_node_by_name;
expression np,E;
identifier l;
@@

for_each_node_by_name(np,...) {
  ... when != break;
      when != goto l;
}
... when != np = E
- of_node_put(np);
// 

Signed-off-by: Julia Lawall 
Reviewed-by: Grant Likely 
Signed-off-by: Benjamin Herrenschmidt 

---
 arch/powerpc/platforms/powermac/feature.c | 1 -
 arch/powerpc/platforms/powermac/pci.c     | 2 --
 2 files changed, 3 deletions(-)
 
diff --git a/arch/powerpc/platforms/powermac/feature.c b/arch/powerpc/platforms/powermac/feature.c
index 39df6ab..6e26068 100644
--- a/arch/powerpc/platforms/powermac/feature.c
+++ b/arch/powerpc/platforms/powermac/feature.c
@@ -2878,7 +2878,6 @@ set_initial_features(void)
 				core99_airport_enable(np, 0, 0);
 			}
 		}
-		of_node_put(np);
 	}
 
 	/* On all machines that support sound PM, switch sound off */
diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c
index ab2027c..3bc075c 100644
--- a/arch/powerpc/platforms/powermac/pci.c
+++ b/arch/powerpc/platforms/powermac/pci.c
@@ -1155,13 +1155,11 @@ void __init pmac_pcibios_after_init(void)
 			pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, nd, 0, 0);
 		}
 	}
-	of_node_put(nd);
 	for_each_node_by_name(nd, "ethernet") {
 		if (nd->parent && of_device_is_compatible(nd, "gmac")
 		    && of_device_is_compatible(nd->parent, "uni-north"))
 			pmac_call_feature(PMAC_FTR_GMAC_ENABLE, nd, 0, 0);
 	}
-	of_node_put(nd);
 }
 
 void pmac_pci_fixup_cardbus(struct pci_dev* dev)

qlambert