From: Jeremy Linton Date: Mon, 29 Jun 2015 23:50:55 +0000 (-0500) Subject: of/irq: Fix pSeries boot failure X-Git-Tag: firefly_0821_release~176^2~1501^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d23b251669e20b3989643d9c38228039c510478f;p=firefly-linux-kernel-4.4.55.git of/irq: Fix pSeries boot failure of_irq_parse_raw() needs to return the correct interrupt controller node when an interrupt-map property doesn't exist. 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 Reviewed-by: Benjamin Herrenschmidt Signed-off-by: Grant Likely --- diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 1a7980692f25..cb4b9aeaa10d 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;