tpmrm-dev.c (1190B)
1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright (C) 2017 James.Bottomley@HansenPartnership.com 4 */ 5#include <linux/slab.h> 6#include "tpm-dev.h" 7 8struct tpmrm_priv { 9 struct file_priv priv; 10 struct tpm_space space; 11}; 12 13static int tpmrm_open(struct inode *inode, struct file *file) 14{ 15 struct tpm_chip *chip; 16 struct tpmrm_priv *priv; 17 int rc; 18 19 chip = container_of(inode->i_cdev, struct tpm_chip, cdevs); 20 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 21 if (priv == NULL) 22 return -ENOMEM; 23 24 rc = tpm2_init_space(&priv->space, TPM2_SPACE_BUFFER_SIZE); 25 if (rc) { 26 kfree(priv); 27 return -ENOMEM; 28 } 29 30 tpm_common_open(file, chip, &priv->priv, &priv->space); 31 32 return 0; 33} 34 35static int tpmrm_release(struct inode *inode, struct file *file) 36{ 37 struct file_priv *fpriv = file->private_data; 38 struct tpmrm_priv *priv = container_of(fpriv, struct tpmrm_priv, priv); 39 40 tpm_common_release(file, fpriv); 41 tpm2_del_space(fpriv->chip, &priv->space); 42 kfree(priv); 43 44 return 0; 45} 46 47const struct file_operations tpmrm_fops = { 48 .owner = THIS_MODULE, 49 .llseek = no_llseek, 50 .open = tpmrm_open, 51 .read = tpm_common_read, 52 .write = tpm_common_write, 53 .poll = tpm_common_poll, 54 .release = tpmrm_release, 55};