Merge "qseecom: do not wake up listener to receive request if it is not ready" (80e1574b) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/misc/qseecom.c

+22 −15

Original line number	Diff line number	Diff line
		@@ -191,6 +191,7 @@ struct qseecom_registered_listener_list {
		phys_addr_t sb_phys;
		size_t sb_length;
		wait_queue_head_t rcv_req_wq;
		/* rcv_req_flag: -1: not ready; 0: ready and empty; 1: received req */
		int rcv_req_flag;
		int send_resp_flag;
		bool listener_in_use;
		@@ -1346,7 +1347,7 @@ static int qseecom_register_listener(struct qseecom_dev_handle *data,
		if (!new_entry)
		return -ENOMEM;
		memcpy(&new_entry->svc, &rcvd_lstnr, sizeof(rcvd_lstnr));
		new_entry->rcv_req_flag = 0;
		new_entry->rcv_req_flag = -1;

		new_entry->svc.listener_id = rcvd_lstnr.listener_id;
		new_entry->sb_length = rcvd_lstnr.sb_size;
		@@ -1770,21 +1771,20 @@ static void __qseecom_clean_listener_sglistinfo(
		}
		}

		/* wake up listener receive request wq retry delay (ms) and max attemp count */
		#define QSEECOM_WAKE_LISTENER_RCVWQ_DELAY 10
		#define QSEECOM_WAKE_LISTENER_RCVWQ_MAX_ATTEMP 3
		/* wait listener retry delay (ms) and max attemp count */
		#define QSEECOM_WAIT_LISTENER_DELAY 10
		#define QSEECOM_WAIT_LISTENER_MAX_ATTEMP 3

		static int __qseecom_retry_wake_up_listener_rcv_wq(
		static int __is_listener_rcv_wq_not_ready(
		struct qseecom_registered_listener_list *ptr_svc)
		{
		int retry = 0;

		while (ptr_svc->rcv_req_flag == 1 &&
		retry++ < QSEECOM_WAKE_LISTENER_RCVWQ_MAX_ATTEMP) {
		wake_up_interruptible(&ptr_svc->rcv_req_wq);
		msleep(QSEECOM_WAKE_LISTENER_RCVWQ_DELAY);
		while (ptr_svc->rcv_req_flag == -1 &&
		retry++ < QSEECOM_WAIT_LISTENER_MAX_ATTEMP) {
		msleep(QSEECOM_WAIT_LISTENER_DELAY);
		}
		return ptr_svc->rcv_req_flag == 1;
		return ptr_svc->rcv_req_flag == -1;
		}

		static int __qseecom_process_incomplete_cmd(struct qseecom_dev_handle *data,
		@@ -1815,6 +1815,8 @@ static int __qseecom_process_incomplete_cmd(struct qseecom_dev_handle *data,
		list_for_each_entry(ptr_svc,
		&qseecom.registered_listener_list_head, list) {
		if (ptr_svc->svc.listener_id == lstnr) {
		if (__is_listener_rcv_wq_not_ready(ptr_svc))
		break;
		ptr_svc->listener_in_use = true;
		ptr_svc->rcv_req_flag = 1;
		wake_up_interruptible(&ptr_svc->rcv_req_wq);
		@@ -1855,14 +1857,15 @@ static int __qseecom_process_incomplete_cmd(struct qseecom_dev_handle *data,
		goto err_resp;
		}

		if (ptr_svc->rcv_req_flag == 1 &&
		__qseecom_retry_wake_up_listener_rcv_wq(ptr_svc)) {
		if (ptr_svc->rcv_req_flag == -1) {
		pr_err("Service %d is not ready to receive request\n",
		lstnr);
		rc = -ENOENT;
		status = QSEOS_RESULT_FAILURE;
		goto err_resp;

		}

		pr_debug("waking up rcv_req_wq and waiting for send_resp_wq\n");

		/* initialize the new signal mask with all signals*/
		@@ -2144,6 +2147,8 @@ static int __qseecom_reentrancy_process_incomplete_cmd(
		list_for_each_entry(ptr_svc,
		&qseecom.registered_listener_list_head, list) {
		if (ptr_svc->svc.listener_id == lstnr) {
		if (__is_listener_rcv_wq_not_ready(ptr_svc))
		break;
		ptr_svc->listener_in_use = true;
		ptr_svc->rcv_req_flag = 1;
		wake_up_interruptible(&ptr_svc->rcv_req_wq);
		@@ -2184,14 +2189,15 @@ static int __qseecom_reentrancy_process_incomplete_cmd(
		goto err_resp;
		}

		if (ptr_svc->rcv_req_flag == 1 &&
		__qseecom_retry_wake_up_listener_rcv_wq(ptr_svc)) {
		if (ptr_svc->rcv_req_flag == -1) {
		pr_err("Service %d is not ready to receive request\n",
		lstnr);
		rc = -ENOENT;
		status = QSEOS_RESULT_FAILURE;
		goto err_resp;

		}

		pr_debug("waking up rcv_req_wq and waiting for send_resp_wq\n");

		/* initialize the new signal mask with all signals*/
		@@ -3977,7 +3983,7 @@ static int __qseecom_listener_has_rcvd_req(struct qseecom_dev_handle *data,
		{
		int ret;

		ret = (svc->rcv_req_flag != 0);
		ret = (svc->rcv_req_flag == 1);
		return ret \|\| data->abort \|\| svc->abort;
		}

		@@ -3991,6 +3997,7 @@ static int qseecom_receive_req(struct qseecom_dev_handle *data)
		pr_err("Invalid listener ID\n");
		return -ENODATA;
		}
		this_lstnr->rcv_req_flag = 0;

		while (1) {
		if (wait_event_freezable(this_lstnr->rcv_req_wq,