diff options
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 45 | ||||
| -rw-r--r-- | include/drm/drm_modes.h | 22 |
2 files changed, 42 insertions, 25 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 3d48ad1c3682..717c4e7271b0 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -2289,7 +2289,7 @@ static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *conne static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, - const struct list_head *export_list, + const struct list_head *modes, const struct drm_file *file_priv) { /* @@ -2305,15 +2305,17 @@ drm_mode_expose_to_userspace(const struct drm_display_mode *mode, * while preparing the list of user-modes. */ if (!file_priv->aspect_ratio_allowed) { - struct drm_display_mode *mode_itr; + const struct drm_display_mode *mode_itr; - list_for_each_entry(mode_itr, export_list, export_head) - if (drm_mode_match(mode_itr, mode, + list_for_each_entry(mode_itr, modes, head) { + if (mode_itr->expose_to_userspace && + drm_mode_match(mode_itr, mode, DRM_MODE_MATCH_TIMINGS | DRM_MODE_MATCH_CLOCK | DRM_MODE_MATCH_FLAGS | DRM_MODE_MATCH_3D_FLAGS)) return false; + } } return true; @@ -2333,7 +2335,6 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, struct drm_mode_modeinfo u_mode; struct drm_mode_modeinfo __user *mode_ptr; uint32_t __user *encoder_ptr; - LIST_HEAD(export_list); if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EOPNOTSUPP; @@ -2377,25 +2378,30 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, out_resp->connection = connector->status; /* delayed so we get modes regardless of pre-fill_modes state */ - list_for_each_entry(mode, &connector->modes, head) - if (drm_mode_expose_to_userspace(mode, &export_list, + list_for_each_entry(mode, &connector->modes, head) { + WARN_ON(mode->expose_to_userspace); + + if (drm_mode_expose_to_userspace(mode, &connector->modes, file_priv)) { - list_add_tail(&mode->export_head, &export_list); + mode->expose_to_userspace = true; mode_count++; } + } /* * This ioctl is called twice, once to determine how much space is * needed, and the 2nd time to fill it. - * The modes that need to be exposed to the user are maintained in the - * 'export_list'. When the ioctl is called first time to determine the, - * space, the export_list gets filled, to find the no.of modes. In the - * 2nd time, the user modes are filled, one by one from the export_list. */ if ((out_resp->count_modes >= mode_count) && mode_count) { copied = 0; mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; - list_for_each_entry(mode, &export_list, export_head) { + list_for_each_entry(mode, &connector->modes, head) { + if (!mode->expose_to_userspace) + continue; + + /* Clear the tag for the next time around */ + mode->expose_to_userspace = false; + drm_mode_convert_to_umode(&u_mode, mode); /* * Reset aspect ratio flags of user-mode, if modes with @@ -2406,13 +2412,26 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, if (copy_to_user(mode_ptr + copied, &u_mode, sizeof(u_mode))) { ret = -EFAULT; + + /* + * Clear the tag for the rest of + * the modes for the next time around. + */ + list_for_each_entry_continue(mode, &connector->modes, head) + mode->expose_to_userspace = false; + mutex_unlock(&dev->mode_config.mutex); goto out; } copied++; } + } else { + /* Clear the tag for the next time around */ + list_for_each_entry(mode, &connector->modes, head) + mode->expose_to_userspace = false; } + out_resp->count_modes = mode_count; mutex_unlock(&dev->mode_config.mutex); diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h index 7d686f9a29bf..cdf2a299ccd4 100644 --- a/include/drm/drm_modes.h +++ b/include/drm/drm_modes.h @@ -350,24 +350,22 @@ struct drm_display_mode { u8 type; /** - * @head: + * @expose_to_userspace: * - * struct list_head for mode lists. + * Indicates whether the mode is to be exposed to the userspace. + * This is to maintain a set of exposed modes while preparing + * user-mode's list in drm_mode_getconnector ioctl. The purpose of + * this only lies in the ioctl function, and is not to be used + * outside the function. */ - struct list_head head; + bool expose_to_userspace; /** - * @export_head: + * @head: * - * struct list_head for modes to be exposed to the userspace. - * This is to maintain a list of exposed modes while preparing - * user-mode's list in drm_mode_getconnector ioctl. The purpose of this - * list_head only lies in the ioctl function, and is not expected to be - * used outside the function. - * Once used, the stale pointers are not reset, but left as it is, to - * avoid overhead of protecting it by mode_config.mutex. + * struct list_head for mode lists. */ - struct list_head export_head; + struct list_head head; /** * @name: |