From b3f2333de8e81b089262b26d52272911523e605f Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 11 Dec 2013 11:34:31 +0100 Subject: drm: restrict the device list for shadow attached drivers There's really no need for the drm core to keep a list of all devices of a given driver - the linux device model keeps perfect track of this already for us. The exception is old legacy ums drivers using pci shadow attaching. So rename the lists to make the use case clearer and rip out everything else. v2: Rebase on top of David Herrmann's drm device register changes. Also drop the bogus dev_set_drvdata for platform drivers that somehow crept into the original version - drivers really should be in full control of that field. v3: Initialize driver->legacy_dev_list outside of the loop, spotted by David Herrmann. v4: Rebase on top of the newly created host1x drm_bus for tegra. Cc: David Herrmann Signed-off-by: Daniel Vetter Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_pci.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/drm_pci.c') diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c index 02679793c9e2..efadad850288 100644 --- a/drivers/gpu/drm/drm_pci.c +++ b/drivers/gpu/drm/drm_pci.c @@ -346,6 +346,11 @@ int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent, driver->name, driver->major, driver->minor, driver->patchlevel, driver->date, pci_name(pdev), dev->primary->index); + /* No locking needed since shadow-attach is single-threaded since it may + * only be called from the per-driver module init hook. */ + if (!drm_core_check_feature(dev, DRIVER_MODESET)) + list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list); + return 0; err_pci: @@ -375,7 +380,6 @@ int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver) DRM_DEBUG("\n"); - INIT_LIST_HEAD(&driver->device_list); driver->kdriver.pci = pdriver; driver->bus = &drm_pci_bus; @@ -383,6 +387,7 @@ int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver) return pci_register_driver(pdriver); /* If not using KMS, fall back to stealth mode manual scanning. */ + INIT_LIST_HEAD(&driver->legacy_dev_list); for (i = 0; pdriver->id_table[i].vendor != 0; i++) { pid = &pdriver->id_table[i]; @@ -465,8 +470,11 @@ void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver) if (driver->driver_features & DRIVER_MODESET) { pci_unregister_driver(pdriver); } else { - list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item) + list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list, + legacy_dev_list) { drm_put_dev(dev); + list_del(&dev->legacy_dev_list); + } } DRM_INFO("Module unloaded\n"); } -- cgit v1.2.3