[ewg] [PATCH]openibd: Add location code fix for for rhel-4.5

[Stefan Roscher]

The location code fix which is included in OFED-1.3-rc1 openibd script fails on rhel-4.5, because the /proc/ppc64/ofdt
does not provide "update_property" functionallity. So we have to workaround this missing function call.If two devices 
have the same location code and we are running on rhel-4.5, we will first save all properties of this node, then delete the node
and add the node again with an updated location code. This patch adds this workaround in openibd script.
On all other kernels and distributions the original functionallity is unchanged.

Signed-off-by: Stefan Roscher <stefan.roscher at de.ibm.com>
---

 openibd |   35 ++++++++++++++++++++++++++++++-----
 1 file changed, 30 insertions(+), 5 deletions(-)


--- ofa_kernel-1.3_old/ofed_scripts/openibd	2007-12-12 06:45:57.000000000 -0500
+++ ofa_kernel-1.3_new/ofed_scripts/openibd	2007-12-20 10:34:09.000000000 -0500
@@ -556,7 +556,7 @@ need_location_code_fix()
 	2.6.9-*.EL*)
 		sub=$(echo $KVERSION | cut -d"-" -f2 | cut -d"." -f1)
 		if [ $sub -lt 62 ]; then
-			return 0;
+			return 2;
 		fi
 	;;
 	2.6.16.*-*-*)
@@ -587,12 +587,14 @@ fix_location_codes()
 	# ppc64 only:
 	# Fix duplicate location codes on kernels where ibmebus can't handle them
 
-	if ! need_location_code_fix; then return 0; fi
+	need_location_code_fix
+	ret=$?
+	if  [ $ret = 1 ]; then return 0; fi
 	if ! [ -d /proc/device-tree -a -f /proc/ppc64/ofdt ]; then return 0; fi
 
 	local i=1 phandle lcode len
 	# output all duplicate location codes and their devices
-	for attr in $(find /proc/device-tree -wholename "*lhca\@*/ibm,loc-code"); do
+	for attr in $(find /proc/device-tree -name "ibm,loc-code" | grep "lh.a"); do
 		echo -e $(dirname $attr)"\t"$(cat $attr)
 	done | sort -k2 | uniq -f1 --all-repeated=separate | cut -f1 | while read dev; do
 		if [ -n "$dev" ]; then
@@ -600,9 +602,32 @@ fix_location_codes()
 			phandle=$(hexdump -e '8 "%u"' $dev/ibm,phandle)
 			lcode=$(cat $dev/ibm,loc-code)-I$i
 			len=$(echo -n "$lcode" | wc -c)
-			# echo "$dev -> $lcode"
-			echo -n "update_property $phandle ibm,loc-code $len $lcode" > /proc/ppc64/ofdt
+			node=${dev#/proc/device-tree}
+
+			# kernel-2.6.9 don't provide "update_property"
+			if [ ! -z "$(echo -n "$node" | grep "lhca")" ]; then
+				if [ $ret = 2 ]; then
+					echo -n "add_node $node" > /tmp/addnode
+					cd $dev
+                        		for a in *; do
+						SIZE=$(stat -c%s $a)
+                                		if [ "$a" = "ibm,loc-code" ] ; then
+                                     			echo -n " $a $len $lcode" >> /tmp/addnode
+                                		elif [ "$a" = "interrupts" ] ; then
+                                     			echo -n " $a 0 " >> /tmp/addnode
+                              			else
+                                     			echo -n " $a $SIZE " >> /tmp/addnode
+                                    			cat $a >> /tmp/addnode
+                           			fi
+                        		done
+					echo -n "remove_node $node" > /proc/ppc64/ofdt
+					cat /tmp/addnode > /proc/ppc64/ofdt
+					rm -rf /tmp/addnode
+				else
+					echo -n "update_property $phandle ibm,loc-code $len $lcode" > /proc/ppc64/ofdt
+				fi
 			i=$(($i + 1))
+			fi
 		else
 			# empty line means new group -- reset i
 			i=1