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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: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2019-01-22 16:21:44 +01:00
parent 03eb2a08fc
commit 4aa3b1f67d
1 changed files with 5 additions and 18 deletions
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23
kernel/fail_function.c
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@ -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);