Merge pull request #110 from slaclab/update_class_create

Fix class create call for newer kernels

LICENSE.txt

@@ -1,4 +1,4 @@
-Copyright (c) 2023, The Board of Trustees of the Leland Stanford Junior 
+Copyright (c) 2024, The Board of Trustees of the Leland Stanford Junior 
 University, through SLAC National Accelerator Laboratory (subject to receipt 
 of any required approvals from the U.S. Dept. of Energy). All rights reserved. 
 Redistribution and use in source and binary forms, with or without 

common/driver/dma_common.c

@@ -160,10 +160,18 @@ int Dma_Init(struct DmaDevice *dev) {
    // Create class struct if it does not already exist
    if (gCl == NULL) {
       dev_info(dev->device,"Init: Creating device class\n");
-      if ((gCl = class_create(THIS_MODULE, dev->devName)) == NULL) {
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0)
+      gCl = class_create(THIS_MODULE, dev->devName);
+#else
+      gCl = class_create(dev->devName);
+#endif
+
+      if (gCl == NULL) {
          dev_err(dev->device,"Init: Failed to create device class\n");
          goto cleanup_cdev_add;
       }
+
       gCl->devnode = (void *)Dma_DevNode;
    }