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Commit 185c9bcf authored by Ming Lei's avatar Ming Lei Committed by Greg Kroah-Hartman
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USB: ehci: fix remove of ehci debugfs dir 



The patch below on gregkh tree only creates 'lpm' file under
ehci->debug_dir, but not removes it when unloading module,

	 USB: EHCI: EHCI 1.1 addendum: preparation

which can make loading of ehci-hcd module failed after unloading it.

This patch replaces debugfs_remove with debugfs_remove_recursive
to remove ehci debugfs dir and files. It does fix the bug above,
and may simplify the removing procedure.

Also, remove the debug_registers, debug_async and debug_periodic
field from ehci_hcd struct since they are useless now.

Signed-off-by: default avatarMing Lei <tom.leiming@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent f2402f21

drivers/usb/host/ehci-dbg.c

+21 −37
Original line number Diff line number Diff line
@@ -1049,49 +1049,33 @@ static inline void create_debug_files (struct ehci_hcd *ehci) 


	ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);

	if (!ehci->debug_dir)

		goto dir_error;



	ehci->debug_async = debugfs_create_file("async", S_IRUGO,

						ehci->debug_dir, bus,

						&debug_async_fops);

	if (!ehci->debug_async)

		goto async_error;



	ehci->debug_periodic = debugfs_create_file("periodic", S_IRUGO,

						   ehci->debug_dir, bus,

						   &debug_periodic_fops);

	if (!ehci->debug_periodic)

		goto periodic_error;



	ehci->debug_registers = debugfs_create_file("registers", S_IRUGO,

						    ehci->debug_dir, bus,

						    &debug_registers_fops);



	ehci->debug_registers = debugfs_create_file("lpm", S_IRUGO|S_IWUGO,

						    ehci->debug_dir, bus,

						    &debug_lpm_fops);

	if (!ehci->debug_registers)

		goto registers_error;

		return;



registers_error:

	debugfs_remove(ehci->debug_periodic);

periodic_error:

	debugfs_remove(ehci->debug_async);

async_error:

	debugfs_remove(ehci->debug_dir);

dir_error:

	ehci->debug_periodic = NULL;

	ehci->debug_async = NULL;

	ehci->debug_dir = NULL;

	if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,

						&debug_async_fops))

		goto file_error;



	if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,

						&debug_periodic_fops))

		goto file_error;



	if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,

						    &debug_registers_fops))

		goto file_error;



	if (!debugfs_create_file("lpm", S_IRUGO|S_IWUGO, ehci->debug_dir, bus,

						    &debug_lpm_fops))

		goto file_error;



	return;



file_error:

	debugfs_remove_recursive(ehci->debug_dir);

}



static inline void remove_debug_files (struct ehci_hcd *ehci)

{

	debugfs_remove(ehci->debug_registers);

	debugfs_remove(ehci->debug_periodic);

	debugfs_remove(ehci->debug_async);

	debugfs_remove(ehci->debug_dir);

	debugfs_remove_recursive(ehci->debug_dir);

}



#endif /* STUB_DEBUG_FILES */

drivers/usb/host/ehci.h

+0 −4
Original line number Diff line number Diff line
@@ -156,10 +156,6 @@ struct ehci_hcd { /* one per controller */ 
	/* debug files */

#ifdef DEBUG

	struct dentry		*debug_dir;

	struct dentry		*debug_async;

	struct dentry		*debug_periodic;

	struct dentry		*debug_registers;

	struct dentry		*debug_lpm;

#endif

};