linux-kernel - [PATCH AUTOSEL 4.18 01/56] ARM: OMAP2+: Fix null hwmod for ti-sysc debug

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Date:   Thu, 20 Sep 2018 02:47:25 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Tony Lindgren <tony@...mide.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 01/56] ARM: OMAP2+: Fix null hwmod for ti-sysc
 debug

From: Tony Lindgren <tony@...mide.com>

[ Upstream commit 4769c003e0fcff0ee001a9102e2605bdaa5880f0 ]

We may call omap_hwmod_parse_module_range() with no hwmod allocated yet
and may have debug enabled. Let's fix this by checking for hwmod before
trying to use it's name.

Fixes: 6c72b3550672 ("ARM: OMAP2+: Parse module IO range from dts for legacy
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 arch/arm/mach-omap2/omap_hwmod.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 2ceffd85dd3d..7f759abcf49c 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -2220,7 +2220,7 @@ int omap_hwmod_parse_module_range(struct omap_hwmod *oh,
 	size = be32_to_cpup(ranges);
 
 	pr_debug("omap_hwmod: %s %s at 0x%llx size 0x%llx\n",
-		 oh->name, np->name, base, size);
+		 oh ? oh->name : "", np->name, base, size);
 
 	res->start = base;
 	res->end = base + size - 1;
-- 
2.17.1