[PATCH] Fix pSeries boot failure, by returning interrupt controller node when an interrupt-map property doesn't exist

[Jeremy Linton]

This is a reformat of the patch attached to "pSeries boot failure due
to wrong interrupt controller".

It allows of_irq_parse_raw() to return the node pointer of the
interrupt controller, rather than the parent bus. This allows
ics_rtas_host_match() to detect that the controller is a legacy 8259
and avoid using xics. This avoids an RTAS assertion/crash during early
kernel bootstrapping.




Signed-off-by: Jeremy Linton <lintonrjeremy at gmail.com>
---
 drivers/of/irq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 1a79806..cb4b9ae 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -252,8 +252,6 @@ int of_irq_parse_raw(const __be32 *addr, struct
of_phandle_args *out_irq)
                 * Successfully parsed an interrrupt-map translation; copy new
                 * interrupt specifier into the out_irq structure
                 */
-               out_irq->np = newpar;
-
                match_array = imap - newaddrsize - newintsize;
                for (i = 0; i < newintsize; i++)
                        out_irq->args[i] = be32_to_cpup(imap - newintsize + i);
@@ -262,6 +260,7 @@ int of_irq_parse_raw(const __be32 *addr, struct
of_phandle_args *out_irq)

        skiplevel:
                /* Iterate again with new parent */
+               out_irq->np = newpar;
                pr_debug(" -> new parent: %s\n", of_node_full_name(newpar));
                of_node_put(ipar);
                ipar = newpar;
--
1.8.1.4