cregit-Linux how code gets into the kernel

Release 4.11 drivers/parisc/eisa_eeprom.c

Directory: drivers/parisc
/* 
 *    EISA "eeprom" support routines
 *
 *    Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
 *
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <asm/io.h>
#include <linux/uaccess.h>
#include <asm/eisa_eeprom.h>


#define 	EISA_EEPROM_MINOR 241


static loff_t eisa_eeprom_llseek(struct file *file, loff_t offset, int origin) { return fixed_size_llseek(file, offset, origin, HPEE_MAX_LENGTH); }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox2068.97%133.33%
Al Viro827.59%133.33%
Dave Jones13.45%133.33%
Total29100.00%3100.00%


static ssize_t eisa_eeprom_read(struct file * file, char __user *buf, size_t count, loff_t *ppos ) { unsigned char *tmp; ssize_t ret; int i; if (*ppos < 0 || *ppos >= HPEE_MAX_LENGTH) return 0; count = *ppos + count < HPEE_MAX_LENGTH ? count : HPEE_MAX_LENGTH - *ppos; tmp = kmalloc(count, GFP_KERNEL); if (tmp) { for (i = 0; i < count; i++) tmp[i] = readb(eisa_eeprom_addr+(*ppos)++); if (copy_to_user (buf, tmp, count)) ret = -EFAULT; else ret = count; kfree (tmp); } else ret = -ENOMEM; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox13895.83%250.00%
Michael Büsch53.47%125.00%
Alexey Dobriyan10.69%125.00%
Total144100.00%4100.00%


static int eisa_eeprom_open(struct inode *inode, struct file *file) { if (file->f_mode & FMODE_WRITE) return -EINVAL; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox3096.77%150.00%
Al Viro13.23%150.00%
Total31100.00%2100.00%


static int eisa_eeprom_release(struct inode *inode, struct file *file) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox19100.00%1100.00%
Total19100.00%1100.00%

/* * The various file operations we support. */ static const struct file_operations eisa_eeprom_fops = { .owner = THIS_MODULE, .llseek = eisa_eeprom_llseek, .read = eisa_eeprom_read, .open = eisa_eeprom_open, .release = eisa_eeprom_release, }; static struct miscdevice eisa_eeprom_dev = { EISA_EEPROM_MINOR, "eisa_eeprom", &eisa_eeprom_fops };
static int __init eisa_eeprom_init(void) { int retval; if (!eisa_eeprom_addr) return -ENODEV; retval = misc_register(&eisa_eeprom_dev); if (retval < 0) { printk(KERN_ERR "EISA EEPROM: cannot register misc device.\n"); return retval; } printk(KERN_INFO "EISA EEPROM at 0x%p\n", eisa_eeprom_addr); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox3256.14%266.67%
Rusty Russell2543.86%133.33%
Total57100.00%3100.00%

MODULE_LICENSE("GPL"); module_init(eisa_eeprom_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox32788.38%538.46%
Rusty Russell256.76%17.69%
Al Viro92.43%215.38%
Michael Büsch51.35%17.69%
Linus Torvalds10.27%17.69%
Arjan van de Ven10.27%17.69%
Dave Jones10.27%17.69%
Alexey Dobriyan10.27%17.69%
Total370100.00%13100.00%
Directory: drivers/parisc
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