rtlwifi: rtl8192se: Handle duplicate PCI ID 0x10ec:0x8192 conflict wi…

…th r8192e_pci

There are two devices with PCI ID 0x10ec:0x8192, namely RTL8192E and
RTL8192SE. The method of distinguishing them is by the revision ID
at offset 0x8 of the PCI configuration space. If the value is 0x10,
then the device uses rtl8192se for a driver.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtlwifi/pci.c

@@ -1624,6 +1624,16 @@ static bool _rtl_pci_find_adapter(struct pci_dev *pdev,
 	pci_read_config_byte(pdev, 0x8, &revisionid);
 	pci_read_config_word(pdev, 0x3C, &irqline);
 
+	/* PCI ID 0x10ec:0x8192 occurs for both RTL8192E, which uses
+	 * r8192e_pci, and RTL8192SE, which uses this driver. If the
+	 * revision ID is RTL_PCI_REVISION_ID_8192PCIE (0x01), then
+	 * the correct driver is r8192e_pci, thus this routine should
+	 * return false.
+	 */
+	if (deviceid == RTL_PCI_8192SE_DID &&
+	    revisionid == RTL_PCI_REVISION_ID_8192PCIE)
+		return false;
+
 	if (deviceid == RTL_PCI_8192_DID ||
 	    deviceid == RTL_PCI_0044_DID ||
 	    deviceid == RTL_PCI_0047_DID ||
@@ -1856,7 +1866,8 @@ int __devinit rtl_pci_probe(struct pci_dev *pdev,
 	pci_write_config_byte(pdev, 0x04, 0x07);
 
 	/* find adapter */
-	_rtl_pci_find_adapter(pdev, hw);
+	if (!_rtl_pci_find_adapter(pdev, hw))
+		goto fail3;
 
 	/* Init IO handler */
 	_rtl_pci_io_handler_init(&pdev->dev, hw);