drm/vmwgfx: Fix the lockdep breakage

Thomas has noticed that the lockdep was broken in vmwgfx. It
was broken during the pci initialization rework. This fixes
the breakage by making sure we initialize the locking code
before doing anything else. This was independently spotted
and fixed by Tetsuo Handa as well.

Reviewed-by: Martin Krastev <krastevm@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Zack Rusin <zackr@vmware.com>
Fixes: 8772c0bb58bbf98a ("drm/vmwgfx: Cleanup pci resource allocation")
Link: https://patchwork.freedesktop.org/patch/msgid/20210408172245.673785-1-zackr@vmware.com

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index dd69b51..6fa2464 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -712,17 +712,8 @@ static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
        dev_priv->last_read_seqno = (uint32_t) -100;
        dev_priv->drm.dev_private = dev_priv;
 
-       ret = vmw_setup_pci_resources(dev_priv, pci_id);
-       if (ret)
-               return ret;
-       ret = vmw_detect_version(dev_priv);
-       if (ret)
-               goto out_no_pci_or_version;
-
        mutex_init(&dev_priv->cmdbuf_mutex);
-       mutex_init(&dev_priv->release_mutex);
        mutex_init(&dev_priv->binding_mutex);
-       mutex_init(&dev_priv->global_kms_state_mutex);
        ttm_lock_init(&dev_priv->reservation_sem);
        spin_lock_init(&dev_priv->resource_lock);
        spin_lock_init(&dev_priv->hw_lock);
@@ -730,6 +721,14 @@ static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
        spin_lock_init(&dev_priv->cap_lock);
        spin_lock_init(&dev_priv->cursor_lock);
 
+       ret = vmw_setup_pci_resources(dev_priv, pci_id);
+       if (ret)
+               return ret;
+       ret = vmw_detect_version(dev_priv);
+       if (ret)
+               goto out_no_pci_or_version;
+
+
        for (i = vmw_res_context; i < vmw_res_max; ++i) {
                idr_init(&dev_priv->res_idr[i]);
                INIT_LIST_HEAD(&dev_priv->res_lru[i]);

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 336f508..8087a90 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -529,7 +529,6 @@ struct vmw_private {
        struct vmw_overlay *overlay_priv;
        struct drm_property *hotplug_mode_update_property;
        struct drm_property *implicit_placement_property;
-       struct mutex global_kms_state_mutex;
        spinlock_t cursor_lock;
        struct drm_atomic_state *suspend_state;
 
@@ -592,7 +591,6 @@ struct vmw_private {
        bool refuse_hibernation;
        bool suspend_locked;
 
-       struct mutex release_mutex;
        atomic_t num_fifo_resources;
 
        /*