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[v2,1/6] omap: mailbox: check iomem resource before dereferencing it

Message ID 1370970210-6669-1-git-send-email-s-anna@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Suman Anna June 11, 2013, 5:03 p.m. UTC 
Add a NULL check for iomem resource in mailbox probe functions.

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

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;