Release 4.14 drivers/w1/w1_family.c
/*
* Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net>
*
* 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.
*/
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/sched/signal.h>
#include <linux/delay.h>
#include <linux/export.h>
#include "w1_internal.h"
DEFINE_SPINLOCK(w1_flock);
static LIST_HEAD(w1_families);
/**
* w1_register_family() - register a device family driver
* @newf: family to register
*/
int w1_register_family(struct w1_family *newf)
{
struct list_head *ent, *n;
struct w1_family *f;
int ret = 0;
spin_lock(&w1_flock);
list_for_each_safe(ent, n, &w1_families) {
f = list_entry(ent, struct w1_family, family_entry);
if (f->fid == newf->fid) {
ret = -EEXIST;
break;
}
}
if (!ret) {
atomic_set(&newf->refcnt, 0);
list_add_tail(&newf->family_entry, &w1_families);
}
spin_unlock(&w1_flock);
/* check default devices against the new set of drivers */
w1_reconnect_slaves(newf, 1);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 111 | 93.28% | 1 | 33.33% |
| Evgeniy Polyakov | 5 | 4.20% | 1 | 33.33% |
| David Fries | 3 | 2.52% | 1 | 33.33% |
| Total | 119 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(w1_register_family);
/**
* w1_unregister_family() - unregister a device family driver
* @fent: family to unregister
*/
void w1_unregister_family(struct w1_family *fent)
{
struct list_head *ent, *n;
struct w1_family *f;
spin_lock(&w1_flock);
list_for_each_safe(ent, n, &w1_families) {
f = list_entry(ent, struct w1_family, family_entry);
if (f->fid == fent->fid) {
list_del(&fent->family_entry);
break;
}
}
spin_unlock(&w1_flock);
/* deatch devices using this family code */
w1_reconnect_slaves(fent, 0);
while (atomic_read(&fent->refcnt)) {
pr_info("Waiting for family %u to become free: refcnt=%d.\n",
fent->fid, atomic_read(&fent->refcnt));
if (msleep_interruptible(1000))
flush_signals(current);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 90 | 70.87% | 1 | 20.00% |
| Evgeniy Polyakov | 28 | 22.05% | 2 | 40.00% |
| David Fries | 8 | 6.30% | 1 | 20.00% |
| Fjodor Schelichow | 1 | 0.79% | 1 | 20.00% |
| Total | 127 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL(w1_unregister_family);
/*
* Should be called under w1_flock held.
*/
struct w1_family * w1_family_registered(u8 fid)
{
struct list_head *ent, *n;
struct w1_family *f = NULL;
int ret = 0;
list_for_each_safe(ent, n, &w1_families) {
f = list_entry(ent, struct w1_family, family_entry);
if (f->fid == fid) {
ret = 1;
break;
}
}
return (ret) ? f : NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 76 | 100.00% | 1 | 100.00% |
| Total | 76 | 100.00% | 1 | 100.00% |
static void __w1_family_put(struct w1_family *f)
{
atomic_dec(&f->refcnt);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 17 | 89.47% | 1 | 33.33% |
| Evgeniy Polyakov | 1 | 5.26% | 1 | 33.33% |
| David Fries | 1 | 5.26% | 1 | 33.33% |
| Total | 19 | 100.00% | 3 | 100.00% |
void w1_family_put(struct w1_family *f)
{
spin_lock(&w1_flock);
__w1_family_put(f);
spin_unlock(&w1_flock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 25 | 92.59% | 1 | 50.00% |
| Evgeniy Polyakov | 2 | 7.41% | 1 | 50.00% |
| Total | 27 | 100.00% | 2 | 100.00% |
#if 0
void w1_family_get(struct w1_family *f)
{
spin_lock(&w1_flock);
__w1_family_get(f);
spin_unlock(&w1_flock);
}
#endif /* 0 */
void __w1_family_get(struct w1_family *f)
{
smp_mb__before_atomic();
atomic_inc(&f->refcnt);
smp_mb__after_atomic();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 18 | 75.00% | 1 | 33.33% |
| Evgeniy Polyakov | 4 | 16.67% | 1 | 33.33% |
| Peter Zijlstra | 2 | 8.33% | 1 | 33.33% |
| Total | 24 | 100.00% | 3 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 356 | 80.54% | 2 | 10.53% |
| Evgeniy Polyakov | 47 | 10.63% | 5 | 26.32% |
| David Fries | 14 | 3.17% | 3 | 15.79% |
| Andrew F. Davis | 12 | 2.71% | 3 | 15.79% |
| Thomas Gleixner | 4 | 0.90% | 1 | 5.26% |
| Paul Gortmaker | 3 | 0.68% | 1 | 5.26% |
| Peter Zijlstra | 2 | 0.45% | 1 | 5.26% |
| Tim Schmielau | 2 | 0.45% | 1 | 5.26% |
| Fjodor Schelichow | 1 | 0.23% | 1 | 5.26% |
| Ingo Molnar | 1 | 0.23% | 1 | 5.26% |
| Total | 442 | 100.00% | 19 | 100.00% |
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