qseecom: improve error checks in qseecom_probe()

Make change in qseecom_probe() to improve the error return value
checks on some subfunctions, and free memory allocated within
qseecom_retrieve_ce_data.

CRs-fixed: 1075082
Change-Id: I971e555ec8d02ccf4382e83132a696b065a8ff12
Signed-off-by: Zhen Kong <zkong@codeaurora.org>

drivers/misc/qseecom.c

@@ -8125,11 +8125,12 @@ static int qseecom_check_whitelist_feature(void)
 static int qseecom_probe(struct platform_device *pdev)
 {
 	int rc;
-	int ret = 0;
+	int i;
 	uint32_t feature = 10;
 	struct device *class_dev;
 	struct msm_bus_scale_pdata *qseecom_platform_support = NULL;
 	struct qseecom_command_scm_resp resp;
+	struct qseecom_ce_info_use *pce_info_use = NULL;
 
 	qseecom.qsee_bw_count = 0;
 	qseecom.qsee_perf_client = 0;
@@ -8171,7 +8172,7 @@ static int qseecom_probe(struct platform_device *pdev)
 
 	class_dev = device_create(driver_class, NULL, qseecom_device_no, NULL,
 			QSEECOM_DEV);
-	if (!class_dev) {
+	if (IS_ERR(class_dev)) {
 		pr_err("class_device_create failed %d\n", rc);
 		rc = -ENOMEM;
 		goto exit_destroy_class;
@@ -8210,7 +8211,7 @@ static int qseecom_probe(struct platform_device *pdev)
 	qseecom.pdev = class_dev;
 	/* Create ION msm client */
 	qseecom.ion_clnt = msm_ion_client_create("qseecom-kernel");
-	if (qseecom.ion_clnt == NULL) {
+	if (IS_ERR_OR_NULL(qseecom.ion_clnt)) {
 		pr_err("Ion client cannot be created\n");
 		rc = -ENOMEM;
 		goto exit_del_cdev;
@@ -8272,14 +8273,14 @@ static int qseecom_probe(struct platform_device *pdev)
 			pr_debug("CE operating frequency is not defined, setting to default 100MHZ\n");
 			qseecom.ce_opp_freq_hz = QSEE_CE_CLK_100MHZ;
 		}
-		ret = __qseecom_init_clk(CLK_QSEE);
+		rc = __qseecom_init_clk(CLK_QSEE);
-		if (ret)
+		if (rc)
 			goto exit_destroy_ion_client;
 
 		if ((qseecom.qsee.instance != qseecom.ce_drv.instance) &&
 				(qseecom.support_pfe || qseecom.support_fde)) {
-			ret = __qseecom_init_clk(CLK_CE_DRV);
+			rc = __qseecom_init_clk(CLK_CE_DRV);
-			if (ret) {
+			if (rc) {
 				__qseecom_deinit_clk(CLK_QSEE);
 				goto exit_destroy_ion_client;
 			}
@@ -8333,9 +8334,14 @@ static int qseecom_probe(struct platform_device *pdev)
 			} else {
 				pr_err("Fail to get secure app region info\n");
 				rc = -EINVAL;
-				goto exit_destroy_ion_client;
+				goto exit_deinit_clock;
+			}
+			rc = __qseecom_enable_clk(CLK_QSEE);
+			if (rc) {
+				pr_err("CLK_QSEE enabling failed (%d)\n", rc);
+				rc = -EIO;
+				goto exit_deinit_clock;
 			}
-			__qseecom_enable_clk(CLK_QSEE);
 			rc = qseecom_scm_call(SCM_SVC_TZSCHEDULER, 1,
 					cmd_buf, cmd_len,
 					&resp, sizeof(resp));
@@ -8344,7 +8350,7 @@ static int qseecom_probe(struct platform_device *pdev)
 				pr_err("send secapp reg fail %d resp.res %d\n",
 							rc, resp.result);
 				rc = -EINVAL;
-				goto exit_destroy_ion_client;
+				goto exit_deinit_clock;
 			}
 		}
 	/*
@@ -8380,7 +8386,28 @@ static int qseecom_probe(struct platform_device *pdev)
 	atomic_set(&qseecom.qseecom_state, QSEECOM_STATE_READY);
 	return 0;
 
+exit_deinit_clock:
+	__qseecom_deinit_clk(CLK_QSEE);
+	if ((qseecom.qsee.instance != qseecom.ce_drv.instance) &&
+		(qseecom.support_pfe || qseecom.support_fde))
+		__qseecom_deinit_clk(CLK_CE_DRV);
 exit_destroy_ion_client:
+	if (qseecom.ce_info.fde) {
+		pce_info_use = qseecom.ce_info.fde;
+		for (i = 0; i < qseecom.ce_info.num_fde; i++) {
+			kzfree(pce_info_use->ce_pipe_entry);
+			pce_info_use++;
+		}
+		kfree(qseecom.ce_info.fde);
+	}
+	if (qseecom.ce_info.pfe) {
+		pce_info_use = qseecom.ce_info.pfe;
+		for (i = 0; i < qseecom.ce_info.num_pfe; i++) {
+			kzfree(pce_info_use->ce_pipe_entry);
+			pce_info_use++;
+		}
+		kfree(qseecom.ce_info.pfe);
+	}
 	ion_client_destroy(qseecom.ion_clnt);
 exit_del_cdev:
 	cdev_del(&qseecom.cdev);