libata: samsung_cf: fix handling platform_get_irq result

Author: Andrzej Hajda <a.hajda@samsung.com>

The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107

Signed-off-by: Andrzej Hajda 
Signed-off-by: Tejun Heo

---
 drivers/ata/pata_samsung_cf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/drivers/ata/pata_samsung_cf.c b/drivers/ata/pata_samsung_cf.c
index cbb5a47..f6facd6 100644
--- a/drivers/ata/pata_samsung_cf.c
+++ b/drivers/ata/pata_samsung_cf.c
@@ -70,7 +70,7 @@ struct s3c_ide_info {
 	struct clk *clk;
 	void __iomem *ide_addr;
 	void __iomem *sfr_addr;
-	unsigned int irq;
+	int irq;
 	enum s3c_cpu_type cpu_type;
 	unsigned int fifo_status_reg;
 };

libata: samsung_cf: fix handling platform_get_irq result

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