From 15a7c3bbe344d75e4891c7d30595899c12ccfaa1 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Sun, 1 Oct 2006 10:38:22 -0400
Subject: [libata] pata_artop: kill gcc warning
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gcc complains thusly:

drivers/ata/pata_artop.c: In function ‘artop_init_one’:
drivers/ata/pata_artop.c:429: warning: ‘info’ may be used uninitialized in this function

While this warning is indeed bogus, even with improved static analysis
and value range propagation, gcc will probably never be able to detect
this.

Add a BUG_ON() to trap invalid driver_data entries in the PCI table.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c
index 49565ef..690828e 100644
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -426,7 +426,7 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 		.port_ops	= &artop6260_ops,
 	};
 	struct ata_port_info *port_info[2];
-	struct ata_port_info *info;
+	struct ata_port_info *info = NULL;
 	int ports = 2;
 
 	if (!printed_version++)
@@ -470,6 +470,9 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 		pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80);
 
 	}
+
+	BUG_ON(info == NULL);
+
 	port_info[0] = port_info[1] = info;
 	return ata_pci_init_one(pdev, port_info, ports);
 }
-- 
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