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Commit 4aa3b1f6 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

fail_function: 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.

Cc: Kees Cook <keescook@chromium.org>
Cc: Josef Bacik <jbacik@fb.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
Cc: zhong jiang <zhongjiang@huawei.com>
Acked-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 03eb2a08

kernel/fail_function.c

+5 −18
Original line number Diff line number Diff line
@@ -152,20 +152,13 @@ static int fei_retval_get(void *data, u64 *val) 
DEFINE_DEBUGFS_ATTRIBUTE(fei_retval_ops, fei_retval_get, fei_retval_set,

			 "%llx\n");



static int fei_debugfs_add_attr(struct fei_attr *attr)

static void fei_debugfs_add_attr(struct fei_attr *attr)

{

	struct dentry *dir;



	dir = debugfs_create_dir(attr->kp.symbol_name, fei_debugfs_dir);

	if (!dir)

		return -ENOMEM;



	if (!debugfs_create_file("retval", 0600, dir, attr, &fei_retval_ops)) {

		debugfs_remove_recursive(dir);

		return -ENOMEM;

	}



	return 0;

	debugfs_create_file("retval", 0600, dir, attr, &fei_retval_ops);

}



static void fei_debugfs_remove_attr(struct fei_attr *attr)
@@ -306,7 +299,7 @@ static ssize_t fei_write(struct file *file, const char __user *buffer, 


	ret = register_kprobe(&attr->kp);

	if (!ret)

		ret = fei_debugfs_add_attr(attr);

		fei_debugfs_add_attr(attr);

	if (ret < 0)

		fei_attr_remove(attr);

	else {
@@ -337,19 +330,13 @@ static int __init fei_debugfs_init(void) 
		return PTR_ERR(dir);



	/* injectable attribute is just a symlink of error_inject/list */

	if (!debugfs_create_symlink("injectable", dir,

				    "../error_injection/list"))

		goto error;

	debugfs_create_symlink("injectable", dir, "../error_injection/list");



	if (!debugfs_create_file("inject", 0600, dir, NULL, &fei_ops))

		goto error;

	debugfs_create_file("inject", 0600, dir, NULL, &fei_ops);



	fei_debugfs_dir = dir;



	return 0;

error:

	debugfs_remove_recursive(dir);

	return -ENOMEM;

}



late_initcall(fei_debugfs_init);