cxgb4vf: Behave properly when CONFIG_DEBUG_FS isn't defined ...

When CONFIG_DEBUG_FS we get "ERR_PTR()"s back from the debugfs routines
instead of NULL.  Use the right predicates to check for this.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/cxgb4vf/cxgb4vf_main.c b/drivers/net/cxgb4vf/cxgb4vf_main.c
index 072b64e..2be1088 100644 (file)
--- a/drivers/net/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/cxgb4vf/cxgb4vf_main.c
@@ -2040,7 +2040,7 @@ static int __devinit setup_debugfs(struct adapter *adapter)
 {
        int i;
 
-       BUG_ON(adapter->debugfs_root == NULL);
+       BUG_ON(IS_ERR_OR_NULL(adapter->debugfs_root));
 
        /*
         * Debugfs support is best effort.
@@ -2061,7 +2061,7 @@ static int __devinit setup_debugfs(struct adapter *adapter)
  */
 static void cleanup_debugfs(struct adapter *adapter)
 {
-       BUG_ON(adapter->debugfs_root == NULL);
+       BUG_ON(IS_ERR_OR_NULL(adapter->debugfs_root));
 
        /*
         * Unlike our sister routine cleanup_proc(), we don't need to remove
@@ -2700,11 +2700,11 @@ static int __devinit cxgb4vf_pci_probe(struct pci_dev *pdev,
        /*
         * Set up our debugfs entries.
         */
-       if (cxgb4vf_debugfs_root) {
+       if (!IS_ERR_OR_NULL(cxgb4vf_debugfs_root)) {
                adapter->debugfs_root =
                        debugfs_create_dir(pci_name(pdev),
                                           cxgb4vf_debugfs_root);
-               if (adapter->debugfs_root == NULL)
+               if (IS_ERR_OR_NULL(adapter->debugfs_root))
                        dev_warn(&pdev->dev, "could not create debugfs"
                                 " directory");
                else
@@ -2759,7 +2759,7 @@ static int __devinit cxgb4vf_pci_probe(struct pci_dev *pdev,
         */
 
 err_free_debugfs:
-       if (adapter->debugfs_root) {
+       if (!IS_ERR_OR_NULL(adapter->debugfs_root)) {
                cleanup_debugfs(adapter);
                debugfs_remove_recursive(adapter->debugfs_root);
        }
@@ -2828,7 +2828,7 @@ static void __devexit cxgb4vf_pci_remove(struct pci_dev *pdev)
                /*
                 * Tear down our debugfs entries.
                 */
-               if (adapter->debugfs_root) {
+               if (!IS_ERR_OR_NULL(adapter->debugfs_root)) {
                        cleanup_debugfs(adapter);
                        debugfs_remove_recursive(adapter->debugfs_root);
                }
@@ -2916,12 +2916,12 @@ static int __init cxgb4vf_module_init(void)
 
        /* Debugfs support is optional, just warn if this fails */
        cxgb4vf_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
-       if (!cxgb4vf_debugfs_root)
+       if (IS_ERR_OR_NULL(cxgb4vf_debugfs_root))
                printk(KERN_WARNING KBUILD_MODNAME ": could not create"
                       " debugfs entry, continuing\n");
 
        ret = pci_register_driver(&cxgb4vf_driver);
-       if (ret < 0)
+       if (ret < 0 && !IS_ERR_OR_NULL(cxgb4vf_debugfs_root))
                debugfs_remove(cxgb4vf_debugfs_root);
        return ret;
 }