USB: fhci-hcd: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

There is also no need to keep the file dentries around at all, so remove
those variables from the host controller structure.

Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/fhci-dbg.c b/drivers/usb/host/fhci-dbg.c
index ebf9bb2..100048b 100644 (file)
--- a/drivers/usb/host/fhci-dbg.c
+++ b/drivers/usb/host/fhci-dbg.c
@@ -83,27 +83,14 @@ void fhci_dfs_create(struct fhci_hcd *fhci)
        struct device *dev = fhci_to_hcd(fhci)->self.controller;
 
        fhci->dfs_root = debugfs_create_dir(dev_name(dev), usb_debug_root);
-       if (!fhci->dfs_root) {
-               WARN_ON(1);
-               return;
-       }
-
-       fhci->dfs_regs = debugfs_create_file("regs", S_IFREG | S_IRUGO,
-               fhci->dfs_root, fhci, &fhci_dfs_regs_fops);
 
-       fhci->dfs_irq_stat = debugfs_create_file("irq_stat",
-               S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
-               &fhci_dfs_irq_stat_fops);
-
-       WARN_ON(!fhci->dfs_regs || !fhci->dfs_irq_stat);
+       debugfs_create_file("regs", S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
+                           &fhci_dfs_regs_fops);
+       debugfs_create_file("irq_stat", S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
+                           &fhci_dfs_irq_stat_fops);
 }
 
 void fhci_dfs_destroy(struct fhci_hcd *fhci)
 {
-       if (!fhci->dfs_root)
-               return;
-
-       debugfs_remove(fhci->dfs_irq_stat);
-       debugfs_remove(fhci->dfs_regs);
-       debugfs_remove(fhci->dfs_root);
+       debugfs_remove_recursive(fhci->dfs_root);
 }

diff --git a/drivers/usb/host/fhci.h b/drivers/usb/host/fhci.h
index e7ec41d..2ce5031 100644 (file)
--- a/drivers/usb/host/fhci.h
+++ b/drivers/usb/host/fhci.h
@@ -262,8 +262,6 @@ struct fhci_hcd {
 #ifdef CONFIG_FHCI_DEBUG
        int usb_irq_stat[13];
        struct dentry *dfs_root;
-       struct dentry *dfs_regs;
-       struct dentry *dfs_irq_stat;
 #endif
 };