diff options
Diffstat (limited to 'drivers/gpu/drm/drm_ioctl.c')
-rw-r--r-- | drivers/gpu/drm/drm_ioctl.c | 140 |
1 files changed, 106 insertions, 34 deletions
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 9b9ff46c237..7b03b197fc0 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -64,6 +64,19 @@ int drm_getunique(struct drm_device *dev, void *data, return 0; } +static void +drm_unset_busid(struct drm_device *dev, + struct drm_master *master) +{ + kfree(dev->devname); + dev->devname = NULL; + + kfree(master->unique); + master->unique = NULL; + master->unique_len = 0; + master->unique_size = 0; +} + /** * Set the bus id. * @@ -94,17 +107,24 @@ int drm_setunique(struct drm_device *dev, void *data, master->unique_len = u->unique_len; master->unique_size = u->unique_len + 1; master->unique = kmalloc(master->unique_size, GFP_KERNEL); - if (!master->unique) - return -ENOMEM; - if (copy_from_user(master->unique, u->unique, master->unique_len)) - return -EFAULT; + 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'; dev->devname = kmalloc(strlen(dev->driver->pci_driver.name) + strlen(master->unique) + 2, GFP_KERNEL); - if (!dev->devname) - return -ENOMEM; + if (!dev->devname) { + ret = -ENOMEM; + goto err; + } sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, master->unique); @@ -113,53 +133,103 @@ int drm_setunique(struct drm_device *dev, void *data, * busid. */ ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func); - if (ret != 3) - return -EINVAL; + 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))) - return -EINVAL; + (func != PCI_FUNC(dev->pdev->devfn))) { + ret = -EINVAL; + 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; - int len; + int len, ret; if (master->unique != NULL) - return -EBUSY; + drm_unset_busid(dev, master); - master->unique_len = 40; - master->unique_size = master->unique_len; - master->unique = kmalloc(master->unique_size, GFP_KERNEL); - if (master->unique == NULL) - return -ENOMEM; - - len = snprintf(master->unique, master->unique_len, "pci:%04x:%02x:%02x.%d", - drm_get_pci_domain(dev), - dev->pdev->bus->number, - PCI_SLOT(dev->pdev->devfn), - PCI_FUNC(dev->pdev->devfn)); - if (len >= master->unique_len) - DRM_ERROR("buffer overflow"); - else - master->unique_len = len; + if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE)) { + master->unique_len = 10 + strlen(dev->platformdev->name); + master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL); - dev->devname = kmalloc(strlen(dev->driver->pci_driver.name) + - master->unique_len + 2, GFP_KERNEL); - if (dev->devname == NULL) - return -ENOMEM; + if (master->unique == NULL) + return -ENOMEM; - sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, - master->unique); + len = snprintf(master->unique, master->unique_len, + "platform:%s", dev->platformdev->name); + + if (len > master->unique_len) { + DRM_ERROR("Unique buffer overflowed\n"); + ret = -EINVAL; + goto err; + } + + dev->devname = + kmalloc(strlen(dev->platformdev->name) + + master->unique_len + 2, GFP_KERNEL); + + if (dev->devname == NULL) { + ret = -ENOMEM; + goto err; + } + + sprintf(dev->devname, "%s@%s", dev->platformdev->name, + master->unique); + + } else { + master->unique_len = 40; + master->unique_size = master->unique_len; + master->unique = kmalloc(master->unique_size, GFP_KERNEL); + if (master->unique == NULL) + return -ENOMEM; + + len = snprintf(master->unique, master->unique_len, + "pci:%04x:%02x:%02x.%d", + drm_get_pci_domain(dev), + dev->pdev->bus->number, + PCI_SLOT(dev->pdev->devfn), + PCI_FUNC(dev->pdev->devfn)); + if (len >= master->unique_len) { + DRM_ERROR("buffer overflow"); + ret = -EINVAL; + goto err; + } else + master->unique_len = len; + + dev->devname = + kmalloc(strlen(dev->driver->pci_driver.name) + + master->unique_len + 2, GFP_KERNEL); + + if (dev->devname == NULL) { + ret = -ENOMEM; + goto err; + } + + sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, + master->unique); + } return 0; + +err: + drm_unset_busid(dev, master); + return ret; } /** @@ -323,7 +393,9 @@ int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_pri /* * Version 1.1 includes tying of DRM to specific device */ - drm_set_busid(dev, file_priv); + retcode = drm_set_busid(dev, file_priv); + if (retcode) + goto done; } } |