mei: bus: unconditionally enable clients with vtag support

The list of clients is only visible via mei client bus.
Enabling vtag clients on the mei client bus allows user-space to
enumerate clients with vtag support by traversing the mei bus on sysfs.
This feature is required for ACRN device model service.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200818115147.2567012-11-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 07ba16d..4e30fa9 100644 (file)
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -463,6 +463,17 @@ out:
        dev_dbg(bus->dev, "end of fixup match = %d\n", cldev->do_match);
 }
 
+/**
+ * vt_support - enable on bus clients with vtag support
+ *
+ * @cldev: me clients device
+ */
+static void vt_support(struct mei_cl_device *cldev)
+{
+       if (cldev->me_cl->props.vt_supported == 1)
+               cldev->do_match = 1;
+}
+
 #define MEI_FIXUP(_uuid, _hook) { _uuid, _hook }
 
 static struct mei_fixup {
@@ -476,6 +487,7 @@ static struct mei_fixup {
        MEI_FIXUP(MEI_UUID_WD, mei_wd),
        MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
        MEI_FIXUP(MEI_UUID_HDCP, whitelist),
+       MEI_FIXUP(MEI_UUID_ANY, vt_support),
 };
 
 /**