test an irq patch in xen.pcifront.fixes.patch

kernel.spec

@@ -721,7 +721,7 @@ Patch12421: orinoco-initialise-priv_hw-before-assigning-the-interrupt.patch
 Patch20000: xen.next-2.6.37.patch
 #Patch20001: xen.upstream.core.patch
 # git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git branches
-#Patch20005: xen.pcifront.fixes.patch
+Patch20005: xen.pcifront.fixes.patch
 # git://xenbits.xen.org/people/sstabellini/linux-pvhvm branches
 #Patch20010: xen.pvhvm.fixes.patch
 
@@ -1333,7 +1333,7 @@ ApplyPatch orinoco-initialise-priv_hw-before-assigning-the-interrupt.patch
 # Xen patches
 ApplyPatch xen.next-2.6.37.patch
 #ApplyPatch xen.upstream.core.patch
-#ApplyPatch xen.pcifront.fixes.patch
+ApplyPatch xen.pcifront.fixes.patch
 #ApplyPatch xen.pvhvm.fixes.patch
 
 # END OF PATCH APPLICATIONS
@@ -1949,6 +1949,9 @@ fi
 #                 ||     ||
 
 %changelog
+* Tue Dec 14 2010 Michael Young <m.a.young@durham.ac.uk>
+- test an irq patch in xen.pcifront.fixes.patch
+
 * Fri Dec 10 2010 Kyle McMartin <kyle@redhat.com>
 - Another patch from mjg59: Set _OSC supported field correctly (#638912)
 

xen.pcifront.fixes.patch

@@ -0,0 +1,42 @@
+commit be72548ffe8618c3141c050400306b93f40a107a
+Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+Date:   Tue Dec 14 11:43:40 2010 -0500
+
+    Revert "xen: Find an unbound irq number in reverse order (high to low)."
+    
+    This reverts commit 482839e7b96098f678d0404ec4dd321419ab3ea7.
+    
+    Conflicts:
+    
+    	drivers/xen/events.c
+
+diff --git a/drivers/xen/events.c b/drivers/xen/events.c
+index 0380664..8889e7f 100644
+--- a/drivers/xen/events.c
++++ b/drivers/xen/events.c
+@@ -401,11 +401,9 @@ static int find_unbound_irq(void)
+ 	int irq, res;
+ 	int start = get_nr_hw_irqs();
+ 
+-	if (start == nr_irqs)
+-		goto no_irqs;
+ 
+ 	/* nr_irqs is a magic value. Must not use it.*/
+-	for (irq = nr_irqs-1; irq > start; irq--) {
++	for (irq = start; irq < nr_irqs; irq++) {
+ 		data = irq_get_irq_data(irq);
+ 		/* only 0->15 have init'd desc; handle irq > 16 */
+ 		if (!data)
+@@ -414,11 +412,8 @@ static int find_unbound_irq(void)
+ 			break;
+ 		if (data->chip != &xen_dynamic_chip)
+ 			continue;
+-		if (irq_info[irq].type == IRQT_UNBOUND)
+-			return irq;
+ 	}
+-
+-	if (irq == start)
++	if (irq == nr_irqs)
+ 		goto no_irqs;
+ 
+ 	res = irq_alloc_desc_at(irq, -1);