drm/i915/gvt: remove module refcounting in intel_gvt_{,un}register_hypervisor

THIS_MODULE always is reference when a symbol called by it is used, so
don't bother with the additional reference.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-2-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>

diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c
index f0b69e4..6234247 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/gvt.c
+++ b/drivers/gpu/drm/i915/gvt/gvt.c
@@ -308,10 +308,6 @@ intel_gvt_register_hypervisor(const struct intel_gvt_mpt *m)
            m->type != INTEL_GVT_HYPERVISOR_XEN)
                return -EINVAL;
 
-       /* Get a reference for device model module */
-       if (!try_module_get(THIS_MODULE))
-               return -ENODEV;
-
        intel_gvt_host.mpt = m;
        intel_gvt_host.hypervisor_type = m->type;
        gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
@@ -321,7 +317,6 @@ intel_gvt_register_hypervisor(const struct intel_gvt_mpt *m)
        if (ret < 0) {
                gvt_err("Failed to init %s hypervisor module\n",
                        supported_hypervisors[intel_gvt_host.hypervisor_type]);
-               module_put(THIS_MODULE);
                return -ENODEV;
        }
        gvt_dbg_core("Running with hypervisor %s in host mode\n",
@@ -335,6 +330,5 @@ intel_gvt_unregister_hypervisor(void)
 {
        void *gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
        intel_gvt_hypervisor_host_exit(intel_gvt_host.dev, gvt);
-       module_put(THIS_MODULE);
 }
 EXPORT_SYMBOL_GPL(intel_gvt_unregister_hypervisor);