drm/amd/display: Slightly optimize dm_dmub_outbox1_low_irq()

A kzalloc()+memcpy() can be optimized in a single kmemdup().
This saves a few cycles because some memory doesn't need to be zeroed.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 5bac578..57a5fbd 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -820,15 +820,14 @@ static void dm_dmub_outbox1_low_irq(void *interrupt_params)
                                        DRM_ERROR("Failed to allocate dmub_hpd_wrk");
                                        return;
                                }
-                               dmub_hpd_wrk->dmub_notify = kzalloc(sizeof(struct dmub_notification), GFP_ATOMIC);
+                               dmub_hpd_wrk->dmub_notify = kmemdup(&notify, sizeof(struct dmub_notification),
+                                                                   GFP_ATOMIC);
                                if (!dmub_hpd_wrk->dmub_notify) {
                                        kfree(dmub_hpd_wrk);
                                        DRM_ERROR("Failed to allocate dmub_hpd_wrk->dmub_notify");
                                        return;
                                }
                                INIT_WORK(&dmub_hpd_wrk->handle_hpd_work, dm_handle_hpd_work);
-                               if (dmub_hpd_wrk->dmub_notify)
-                                       memcpy(dmub_hpd_wrk->dmub_notify, &notify, sizeof(struct dmub_notification));
                                dmub_hpd_wrk->adev = adev;
                                if (notify.type == DMUB_NOTIFICATION_HPD) {
                                        plink = adev->dm.dc->links[notify.link_index];