mei: bus: whitelist the watchdog client

The iAMT WD client has to be whitelisted sice it has two connections
and is filtered out by number_of_connections fixup.
Also the API has changed for BDW and SKL but firmware haven't updated
the protocol version.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/bus-fixup.c

@@ -35,6 +35,9 @@ static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
 #define MEI_UUID_NFC_HCI UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, \
 			0x94, 0xd4, 0x50, 0x26, 0x67, 0x23, 0x77, 0x5c)
 
+#define MEI_UUID_WD UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, \
+			    0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB)
+
 #define MEI_UUID_ANY NULL_UUID_LE
 
 /**
@@ -66,6 +69,31 @@ static void blacklist(struct mei_cl_device *cldev)
 	cldev->do_match = 0;
 }
 
+/**
+ * mei_wd - wd client on the bus, change protocol version
+ *   as the API has changed.
+ *
+ * @cldev: me clients device
+ */
+#if IS_ENABLED(CONFIG_INTEL_MEI_ME)
+#include <linux/pci.h>
+#include "hw-me-regs.h"
+static void mei_wd(struct mei_cl_device *cldev)
+{
+	struct pci_dev *pdev = to_pci_dev(cldev->dev.parent);
+
+	dev_dbg(&cldev->dev, "running hook %s\n", __func__);
+	if (pdev->device == MEI_DEV_ID_WPT_LP ||
+	    pdev->device == MEI_DEV_ID_SPT ||
+	    pdev->device == MEI_DEV_ID_SPT_H)
+		cldev->me_cl->props.protocol_version = 0x2;
+
+	cldev->do_match = 1;
+}
+#else
+static inline void mei_wd(struct mei_cl_device *cldev) {}
+#endif /* CONFIG_INTEL_MEI_ME */
+
 struct mei_nfc_cmd {
 	u8 command;
 	u8 status;
@@ -280,6 +308,7 @@ static struct mei_fixup {
 	MEI_FIXUP(MEI_UUID_ANY, number_of_connections),
 	MEI_FIXUP(MEI_UUID_NFC_INFO, blacklist),
 	MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
+	MEI_FIXUP(MEI_UUID_WD, mei_wd),
 };
 
 /**