jmicron: make ide jmicron driver play nice with libata ones

When libata is configured, the device is configured such that SATA and
PATA ports live in separate functions with different programming
interfaces.  pata_jmicron and ide jmicron drivers can drive only the
PATA part.

This patch makes jmicron match PCI class code such that it doesn't
attach itself to the SATA part preventing the proper ahci driver from
attaching.

This change is suggested by Bartlomiej.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: justin@jmicron.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/pci/jmicron.c

@@ -240,12 +240,31 @@ static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_devi
 	return 0;
 }
 
+/* If libata is configured, jmicron PCI quirk will configure it such
+ * that the SATA ports are in AHCI function while the PATA ports are
+ * in a separate IDE function.  In such cases, match device class and
+ * attach only to IDE.  If libata isn't configured, keep the old
+ * behavior for backward compatibility.
+ */
+#if defined(CONFIG_ATA) || defined(CONFIG_ATA_MODULE)
+#define JMB_CLASS	PCI_CLASS_STORAGE_IDE << 8
+#define JMB_CLASS_MASK	0xffff00
+#else
+#define JMB_CLASS	0
+#define JMB_CLASS_MASK	0
+#endif
+
 static struct pci_device_id jmicron_pci_tbl[] = {
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
+	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361,
+	  PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 0},
+	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363,
+	  PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 1},
+	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365,
+	  PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 2},
+	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366,
+	  PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 3},
+	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368,
+	  PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 4},
 	{ 0, },
 };