Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel...

[pandora-kernel.git] / arch / powerpc / platforms / pseries / xics.c

diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index 424b335..84e058f 100644 (file)
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -579,7 +579,7 @@ static void xics_update_irq_servers(void)
        int i, j;
        struct device_node *np;
        u32 ilen;
-       const u32 *ireg, *isize;
+       const u32 *ireg;
        u32 hcpuid;
 
        /* Find the server numbers for the boot cpu. */
@@ -607,11 +607,6 @@ static void xics_update_irq_servers(void)
                }
        }
 
-       /* get the bit size of server numbers */
-       isize = of_get_property(np, "ibm,interrupt-server#-size", NULL);
-       if (isize)
-               interrupt_server_size = *isize;
-
        of_node_put(np);
 }
 
@@ -682,6 +677,7 @@ void __init xics_init_IRQ(void)
        struct device_node *np;
        u32 indx = 0;
        int found = 0;
+       const u32 *isize;
 
        ppc64_boot_msg(0x20, "XICS Init");
 
@@ -701,6 +697,26 @@ void __init xics_init_IRQ(void)
        if (found == 0)
                return;
 
+       /* get the bit size of server numbers */
+       found = 0;
+
+       for_each_compatible_node(np, NULL, "ibm,ppc-xics") {
+               isize = of_get_property(np, "ibm,interrupt-server#-size", NULL);
+
+               if (!isize)
+                       continue;
+
+               if (!found) {
+                       interrupt_server_size = *isize;
+                       found = 1;
+               } else if (*isize != interrupt_server_size) {
+                       printk(KERN_WARNING "XICS: "
+                              "mismatched ibm,interrupt-server#-size\n");
+                       interrupt_server_size = max(*isize,
+                                                   interrupt_server_size);
+               }
+       }
+
        xics_update_irq_servers();
        xics_init_host();
 
@@ -728,9 +744,18 @@ static void xics_set_cpu_priority(unsigned char cppr)
 /* Have the calling processor join or leave the specified global queue */
 static void xics_set_cpu_giq(unsigned int gserver, unsigned int join)
 {
-       int status = rtas_set_indicator_fast(GLOBAL_INTERRUPT_QUEUE,
-               (1UL << interrupt_server_size) - 1 - gserver, join);
-       WARN_ON(status < 0);
+       int index;
+       int status;
+
+       if (!rtas_indicator_present(GLOBAL_INTERRUPT_QUEUE, NULL))
+               return;
+
+       index = (1UL << interrupt_server_size) - 1 - gserver;
+
+       status = rtas_set_indicator_fast(GLOBAL_INTERRUPT_QUEUE, index, join);
+
+       WARN(status < 0, "set-indicator(%d, %d, %u) returned %d\n",
+            GLOBAL_INTERRUPT_QUEUE, index, join, status);
 }
 
 void xics_setup_cpu(void)