1 files changed, 25 insertions, 4 deletions

diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c
index 64f0e047c23d..950b4661d5df 100644
--- a/drivers/tee/optee/device.c
+++ b/drivers/tee/optee/device.c
@@ -7,7 +7,7 @@
 
 #include <linux/kernel.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/uuid.h>
 #include "optee_private.h"
 
@@ -43,6 +43,13 @@ static int get_devices(struct tee_context *ctx, u32 session,
 	ret = tee_client_invoke_func(ctx, &inv_arg, param);
 	if ((ret < 0) || ((inv_arg.ret != TEEC_SUCCESS) &&
 			  (inv_arg.ret != TEEC_ERROR_SHORT_BUFFER))) {
+		/*
+		 * TEE_ERROR_STORAGE_NOT_AVAILABLE is returned when getting
+		 * the list of device TAs that depends on RPMB but a usable
+		 * RPMB device isn't found.
+		 */
+		if (inv_arg.ret == TEE_ERROR_STORAGE_NOT_AVAILABLE)
+			return -ENODEV;
 		pr_err("PTA_CMD_GET_DEVICES invoke function err: %x\n",
 		       inv_arg.ret);
 		return -EINVAL;
@@ -60,7 +67,16 @@ static void optee_release_device(struct device *dev)
 	kfree(optee_device);
 }
 
-static int optee_register_device(const uuid_t *device_uuid)
+static ssize_t need_supplicant_show(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	return 0;
+}
+
+static DEVICE_ATTR_RO(need_supplicant);
+
+static int optee_register_device(const uuid_t *device_uuid, u32 func)
 {
 	struct tee_client_device *optee_device = NULL;
 	int rc;
@@ -81,9 +97,14 @@ static int optee_register_device(const uuid_t *device_uuid)
 	if (rc) {
 		pr_err("device registration failed, err: %d\n", rc);
 		put_device(&optee_device->dev);
+		return rc;
 	}
 
-	return rc;
+	if (func == PTA_CMD_GET_DEVICES_SUPP)
+		device_create_file(&optee_device->dev,
+				   &dev_attr_need_supplicant);
+
+	return 0;
 }
 
 static int __optee_enumerate_devices(u32 func)
@@ -142,7 +163,7 @@ static int __optee_enumerate_devices(u32 func)
 	num_devices = shm_size / sizeof(uuid_t);
 
 	for (idx = 0; idx < num_devices; idx++) {
-		rc = optee_register_device(&device_uuid[idx]);
+		rc = optee_register_device(&device_uuid[idx], func);
 		if (rc)
 			goto out_shm;
 	}