drm: Nuke SET_UNIQUE ioctl

Ever since

commit 2e1868b560315a8b20d688e646c489a5ad93eeae
Author: Eric Anholt <anholt@freebsd.org>
Date:   Wed Jun 16 09:25:21 2004 +0000

    DRI trunk-20040613 import

the X server supports drm 1.1, thus doesn't call call libdrm's
drmSetBusid - the sole user of this ioctl. When reviewing this note
that for hilarity both the kernel-internal functions (set_busid) and
the libdrm wrapper (drmSetBusid) have names not matching this ioctl
(SET_UNIQUE).

v2: Polish commit message (Emil).

Cc: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466499262-18717-6-git-send-email-daniel.vetter@ffwll.ch

3 files changed, 1 insertions, 100 deletions

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 38401d406532..b86dc9b921a5 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -29,9 +29,6 @@ extern struct mutex drm_global_mutex;
 void drm_lastclose(struct drm_device *dev);
 
 /* drm_pci.c */
-int drm_pci_set_unique(struct drm_device *dev,
-                       struct drm_master *master,
-                       struct drm_unique *u);
 int drm_irq_by_busid(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
 
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index b7f7d968e4cd..1fa7619face3 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -75,51 +75,6 @@ drm_unset_busid(struct drm_device *dev,
         master->unique_len = 0;
 }
 
-/*
- * Set the bus id.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg user argument, pointing to a drm_unique structure.
- * \return zero on success or a negative number on failure.
- *
- * Copies the bus id from userspace into drm_device::unique, and verifies that
- * it matches the device this DRM is attached to (EINVAL otherwise).  Deprecated
- * in interface version 1.1 and will return EBUSY when setversion has requested
- * version 1.1 or greater. Also note that KMS is all version 1.1 and later and
- * UMS was only ever supported on pci devices.
- */
-static int drm_setunique(struct drm_device *dev, void *data,
-                  struct drm_file *file_priv)
-{
-        struct drm_unique *u = data;
-        struct drm_master *master = file_priv->master;
-        int ret;
-
-        if (master->unique_len || master->unique)
-                return -EBUSY;
-
-        if (!u->unique_len || u->unique_len > 1024)
-                return -EINVAL;
-
-        if (drm_core_check_feature(dev, DRIVER_MODESET))
-                return 0;
-
-        if (WARN_ON(!dev->pdev))
-                return -EINVAL;
-
-        ret = drm_pci_set_unique(dev, master, u);
-        if (ret)
-                goto err;
-
-        return 0;
-
-err:
-        drm_unset_busid(dev, master);
-        return ret;
-}
-
 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
 {
         struct drm_master *master = file_priv->master;
@@ -508,7 +463,7 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
         DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
         DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
 
-        DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
+        DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_invalid_op, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
         DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
         DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
         DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_UNLOCKED|DRM_MASTER),
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index 29d5a548d07a..b2f8f1062d5f 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -144,50 +144,6 @@ int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
 }
 EXPORT_SYMBOL(drm_pci_set_busid);
 
-int drm_pci_set_unique(struct drm_device *dev,
-                       struct drm_master *master,
-                       struct drm_unique *u)
-{
-        int domain, bus, slot, func, ret;
-
-        master->unique_len = u->unique_len;
-        master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
-        if (!master->unique) {
-                ret = -ENOMEM;
-                goto err;
-        }
-
-        if (copy_from_user(master->unique, u->unique, master->unique_len)) {
-                ret = -EFAULT;
-                goto err;
-        }
-
-        master->unique[master->unique_len] = '\0';
-
-        /* Return error if the busid submitted doesn't match the device's actual
-         * busid.
-         */
-        ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
-        if (ret != 3) {
-                ret = -EINVAL;
-                goto err;
-        }
-
-        domain = bus >> 8;
-        bus &= 0xff;
-
-        if ((domain != drm_get_pci_domain(dev)) ||
-            (bus != dev->pdev->bus->number) ||
-            (slot != PCI_SLOT(dev->pdev->devfn)) ||
-            (func != PCI_FUNC(dev->pdev->devfn))) {
-                ret = -EINVAL;
-                goto err;
-        }
-        return 0;
-err:
-        return ret;
-}
-
 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
 {
         if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
@@ -444,13 +400,6 @@ int drm_irq_by_busid(struct drm_device *dev, void *data,
 {
         return -EINVAL;
 }
-
-int drm_pci_set_unique(struct drm_device *dev,
-                       struct drm_master *master,
-                       struct drm_unique *u)
-{
-        return -EINVAL;
-}
 #endif
 
 EXPORT_SYMBOL(drm_pci_init);