linux-kernel - [PATCH 3/3] of: Handle memory@0 node on PPC32 only

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Date:	Thu, 17 Apr 2014 18:42:01 +0100
From:	Leif Lindholm <leif.lindholm@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	patches@...aro.org, Leif Lindholm <leif.lindholm@...aro.org>,
	linuxppc-dev@...ts.ozlabs.org,
	Grant Likely <grant.likely@...aro.org>,
	Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org
Subject: [PATCH 3/3] of: Handle memory@0 node on PPC32 only

In order to deal with an firmware bug on a specific ppc32 platform
(longtrail), early_init_dt_scan_memory() looks for a node called
memory@0 on all platforms. Restrict this quirk to ppc32 kernels only.

Signed-off-by: Leif Lindholm <leif.lindholm@...aro.org>
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: Grant Likely <grant.likely@...aro.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: devicetree@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/of/fdt.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index fa16a91..7368472 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -887,14 +887,19 @@ int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
 
 	/* We are scanning "memory" nodes only */
 	if (type == NULL) {
+#ifdef CONFIG_PPC32
 		/*
 		 * The longtrail doesn't have a device_type on the
 		 * /memory node, so look for the node called /memory@0.
 		 */
 		if (depth != 1 || strcmp(uname, "memory@0") != 0)
 			return 0;
-	} else if (strcmp(type, "memory") != 0)
+#else
+		return 0;
+#endif
+	} else if (strcmp(type, "memory") != 0) {
 		return 0;
+	}
 
 	reg = of_get_flat_dt_prop(node, "linux,usable-memory", &l);
 	if (reg == NULL)
-- 
1.7.10.4

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