msm: camera: common: Fix cpas register for custom hw

The client handle is obtained by providing client identifier
to cpas. Add identifier in custom hw registration for cpas
to recognize client. Also, improve identifier string
validation in cpas register client.

CRs-Fixed: 2528679
Change-Id: I924f5c98a8affa26753710fa542c1bb651d0af13
Signed-off-by: Mukund Madhusudan Atre <matre@codeaurora.org>

drivers/cam_cpas/cam_cpas_hw.c

@@ -1369,6 +1369,12 @@ static int cam_cpas_hw_register_client(struct cam_hw_info *cpas_hw,
 	struct cam_cpas_private_soc *soc_private =
 		(struct cam_cpas_private_soc *) cpas_hw->soc_info.soc_private;
 
+	if ((!register_params) ||
+		(strlen(register_params->identifier) < 1)) {
+		CAM_ERR(CAM_CPAS, "Invalid cpas client identifier");
+		return -EINVAL;
+	}
+
 	CAM_DBG(CAM_CPAS, "Register params : identifier=%s, cell_index=%d",
 		register_params->identifier, register_params->cell_index);
 

drivers/cam_cust/cam_custom_hw_mgr/cam_custom_hw1/cam_custom_sub_mod_soc.c

@@ -41,17 +41,20 @@ int cam_custom_hw_sub_mod_init_soc_resources(struct cam_hw_soc_info *soc_info,
 
 	memset(&cpas_register_param, 0, sizeof(cpas_register_param));
 
+	strlcpy(cpas_register_param.identifier, "custom",
+		CAM_HW_IDENTIFIER_LENGTH);
 	cpas_register_param.cell_index = soc_info->index;
 	cpas_register_param.dev = soc_info->dev;
 	cpas_register_param.cam_cpas_client_cb = NULL;
 	cpas_register_param.userdata = soc_info;
-	soc_private->cpas_handle =
-		cpas_register_param.client_handle;
 
 	rc = cam_cpas_register_client(&cpas_register_param);
 	if (rc < 0)
 		goto release_soc;
 
+	soc_private->cpas_handle =
+		cpas_register_param.client_handle;
+
 	return rc;
 
 release_soc: