mirror of
https://github.com/torvalds/linux
synced 2024-10-04 18:33:42 +00:00
97a32539b9
The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in seq_file.h. Conversion rule is: llseek => proc_lseek unlocked_ioctl => proc_ioctl xxx => proc_xxx delete ".owner = THIS_MODULE" line [akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c] [sfr@canb.auug.org.au: fix kernel/sched/psi.c] Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ISA Plug & Play support
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*/
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#include <linux/module.h>
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#include <linux/isapnp.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <linux/uaccess.h>
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extern struct pnp_protocol isapnp_protocol;
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static struct proc_dir_entry *isapnp_proc_bus_dir = NULL;
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static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
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{
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return fixed_size_llseek(file, off, whence, 256);
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}
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static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,
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size_t nbytes, loff_t * ppos)
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{
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struct pnp_dev *dev = PDE_DATA(file_inode(file));
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int pos = *ppos;
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int cnt, size = 256;
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if (pos >= size)
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return 0;
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if (nbytes >= size)
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nbytes = size;
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if (pos + nbytes > size)
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nbytes = size - pos;
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cnt = nbytes;
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if (!access_ok(buf, cnt))
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return -EINVAL;
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isapnp_cfg_begin(dev->card->number, dev->number);
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for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
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unsigned char val;
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val = isapnp_read_byte(pos);
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__put_user(val, buf);
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}
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isapnp_cfg_end();
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*ppos = pos;
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return nbytes;
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}
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static const struct proc_ops isapnp_proc_bus_proc_ops = {
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.proc_lseek = isapnp_proc_bus_lseek,
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.proc_read = isapnp_proc_bus_read,
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};
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static int isapnp_proc_attach_device(struct pnp_dev *dev)
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{
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struct pnp_card *bus = dev->card;
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struct proc_dir_entry *de, *e;
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char name[16];
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if (!(de = bus->procdir)) {
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sprintf(name, "%02x", bus->number);
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de = bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir);
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if (!de)
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return -ENOMEM;
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}
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sprintf(name, "%02x", dev->number);
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e = dev->procent = proc_create_data(name, S_IFREG | S_IRUGO, de,
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&isapnp_proc_bus_proc_ops, dev);
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if (!e)
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return -ENOMEM;
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proc_set_size(e, 256);
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return 0;
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}
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int __init isapnp_proc_init(void)
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{
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struct pnp_dev *dev;
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isapnp_proc_bus_dir = proc_mkdir("bus/isapnp", NULL);
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protocol_for_each_dev(&isapnp_protocol, dev) {
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isapnp_proc_attach_device(dev);
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}
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return 0;
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}
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