[PATCH 1/7] omap: mailbox: check iomem resource before dereferencing it

[Suman Anna]

Add a NULL check for iomem resource in mailbox probe functions.

Signed-off-by: Fernando Guzman Lugo <lugo.fernando at gmail.com>
Signed-off-by: Suman Anna <s-anna at ti.com>
---
 arch/arm/mach-omap1/mailbox.c | 3 +++
 arch/arm/mach-omap2/mailbox.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/arch/arm/mach-omap1/mailbox.c b/arch/arm/mach-omap1/mailbox.c
index efc8f20..a343d5f 100644
--- a/arch/arm/mach-omap1/mailbox.c
+++ b/arch/arm/mach-omap1/mailbox.c
@@ -152,6 +152,9 @@ static int omap1_mbox_probe(struct platform_device *pdev)
 	list[0]->irq = platform_get_irq_byname(pdev, "dsp");
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!mem)
+		return -ENOENT;
+
 	mbox_base = ioremap(mem->start, resource_size(mem));
 	if (!mbox_base)
 		return -ENOMEM;
diff --git a/arch/arm/mach-omap2/mailbox.c b/arch/arm/mach-omap2/mailbox.c
index 0b08026..9fe0bf2 100644
--- a/arch/arm/mach-omap2/mailbox.c
+++ b/arch/arm/mach-omap2/mailbox.c
@@ -382,6 +382,9 @@ static int omap2_mbox_probe(struct platform_device *pdev)
 	}
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!mem)
+		return -ENOENT;
+
 	mbox_base = ioremap(mem->start, resource_size(mem));
 	if (!mbox_base)
 		return -ENOMEM;
-- 
1.8.2