Merge "qseecom: simplify unload app operation" (b51ec806) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/misc/qseecom.c

+31 −78

Original line number	Diff line number	Diff line
		@@ -3029,19 +3029,18 @@ static int qseecom_unload_app(struct qseecom_dev_handle *data,
		bool app_crash)
		{
		unsigned long flags;
		unsigned long flags1;
		int ret = 0;
		struct qseecom_registered_app_list *ptr_app = NULL;
		bool unload = false;
		bool found_app = false;
		bool found_dead_app = false;
		bool doublecheck = false;

		if (!data) {
		pr_err("Invalid/uninitialized device handle\n");
		return -EINVAL;
		}

		pr_debug("unload app %d(%s), app_crash flag %d\n", data->client.app_id,
		data->client.app_name, app_crash);

		if (!memcmp(data->client.app_name, "keymaste", strlen("keymaste"))) {
		pr_debug("Do not unload keymaster app from tz\n");
		goto unload_exit;
		@@ -3050,88 +3049,42 @@ static int qseecom_unload_app(struct qseecom_dev_handle *data,
		__qseecom_cleanup_app(data);
		__qseecom_reentrancy_check_if_no_app_blocked(TZ_OS_APP_SHUTDOWN_ID);

		if (data->client.app_id > 0) {
		/* ignore app_id 0, it happens when close qseecom_fd if load app fail*/
		if (!data->client.app_id)
		goto unload_exit;

		spin_lock_irqsave(&qseecom.registered_app_list_lock, flags);
		list_for_each_entry(ptr_app, &qseecom.registered_app_list_head,
		list) {
		if (ptr_app->app_id == data->client.app_id) {
		if (!strcmp((void *)ptr_app->app_name,
		(void *)data->client.app_name)) {
		if ((ptr_app->app_id == data->client.app_id) &&
		(!strcmp(ptr_app->app_name, data->client.app_name))) {
		pr_debug("unload app %d (%s), ref_cnt %d\n",
		ptr_app->app_id, ptr_app->app_name,
		ptr_app->ref_cnt);
		ptr_app->ref_cnt--;
		found_app = true;
		if (ptr_app->app_blocked \|\|
		ptr_app->check_block)
		app_crash = false;
		if (app_crash \|\| ptr_app->ref_cnt == 1)
		unload = true;
		break;
		}
		found_dead_app = true;
		break;
		}
		}
		spin_unlock_irqrestore(&qseecom.registered_app_list_lock,
		flags);
		if (!found_app && !found_dead_app) {
		if (!found_app) {
		pr_err("Cannot find app with id = %d (%s)\n",
		data->client.app_id,
		(char *)data->client.app_name);
		data->client.app_id, data->client.app_name);
		ret = -EINVAL;
		goto unload_exit;
		}
		}

		if (found_dead_app)
		pr_warn("cleanup app_id %d(%s)\n", data->client.app_id,
		(char *)data->client.app_name);

		if (unload) {
		if (!ptr_app->ref_cnt) {
		ret = __qseecom_unload_app(data, data->client.app_id);

		/* double check if this app_entry still exists */
		spin_lock_irqsave(&qseecom.registered_app_list_lock, flags1);
		list_for_each_entry(ptr_app,
		&qseecom.registered_app_list_head, list) {
		if ((ptr_app->app_id == data->client.app_id) &&
		(!strcmp((void *)ptr_app->app_name,
		(void *)data->client.app_name))) {
		doublecheck = true;
		break;
		}
		}
		spin_unlock_irqrestore(&qseecom.registered_app_list_lock,
		flags1);
		if (!doublecheck) {
		pr_warn("app %d(%s) entry is already removed\n",
		data->client.app_id,
		(char *)data->client.app_name);
		found_app = false;
		}
		}

		unload_exit:
		if (found_app) {
		spin_lock_irqsave(&qseecom.registered_app_list_lock, flags1);
		if (app_crash) {
		ptr_app->ref_cnt = 0;
		pr_debug("app_crash: ref_count = 0\n");
		} else {
		if (ptr_app->ref_cnt == 1) {
		ptr_app->ref_cnt = 0;
		pr_debug("ref_count set to 0\n");
		} else {
		ptr_app->ref_cnt--;
		pr_debug("Can't unload app(%d) inuse\n",
		ptr_app->app_id);
		}
		}
		if (unload) {
		spin_lock_irqsave(&qseecom.registered_app_list_lock, flags);
		list_del(&ptr_app->list);
		kzfree(ptr_app);
		}
		spin_unlock_irqrestore(&qseecom.registered_app_list_lock,
		flags1);
		flags);
		kzfree(ptr_app);
		}

		unload_exit:
		if (data->client.dmabuf)
		qseecom_vaddr_unmap(data->client.sb_virt, data->client.sgt,
		data->client.attach, data->client.dmabuf);