mirror of
https://github.com/torvalds/linux.git
synced 2024-11-24 05:02:12 +00:00
6cb5f3ea46
When fixing the initialization race, we neglected to account for
the fact that debugfs is initialized in wiphy_register(), and
some debugfs things went missing (or rather were rerooted to the
global debugfs root).
Fix this by adding debugfs entries only after wiphy_register().
This requires some changes in the rate control code since it
currently adds debugfs at alloc time, which can no longer be
done after the reordering.
Reported-by: Jouni Malinen <j@w1.fi>
Reported-by: kernel test robot <rong.a.chen@intel.com>
Reported-by: Hauke Mehrtens <hauke@hauke-m.de>
Reported-by: Felix Fietkau <nbd@nbd.name>
Cc: stable@vger.kernel.org
Fixes: 52e04b4ce5 ("mac80211: fix race in ieee80211_register_hw()")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Sumit Garg <sumit.garg@linaro.org>
Link: https://lore.kernel.org/r/20200423111344.0e00d3346f12.Iadc76a03a55093d94391fc672e996a458702875d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright 2002-2005, Instant802 Networks, Inc.
|
|
* Copyright 2005, Devicescape Software, Inc.
|
|
* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
|
|
*/
|
|
|
|
#ifndef IEEE80211_RATE_H
|
|
#define IEEE80211_RATE_H
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/types.h>
|
|
#include <net/mac80211.h>
|
|
#include "ieee80211_i.h"
|
|
#include "sta_info.h"
|
|
#include "driver-ops.h"
|
|
|
|
struct rate_control_ref {
|
|
const struct rate_control_ops *ops;
|
|
void *priv;
|
|
};
|
|
|
|
void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
|
|
struct sta_info *sta,
|
|
struct ieee80211_tx_rate_control *txrc);
|
|
|
|
void rate_control_tx_status(struct ieee80211_local *local,
|
|
struct ieee80211_supported_band *sband,
|
|
struct ieee80211_tx_status *st);
|
|
|
|
void rate_control_rate_init(struct sta_info *sta);
|
|
void rate_control_rate_update(struct ieee80211_local *local,
|
|
struct ieee80211_supported_band *sband,
|
|
struct sta_info *sta, u32 changed);
|
|
|
|
static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
|
|
struct sta_info *sta, gfp_t gfp)
|
|
{
|
|
spin_lock_init(&sta->rate_ctrl_lock);
|
|
return ref->ops->alloc_sta(ref->priv, &sta->sta, gfp);
|
|
}
|
|
|
|
static inline void rate_control_free_sta(struct sta_info *sta)
|
|
{
|
|
struct rate_control_ref *ref = sta->rate_ctrl;
|
|
struct ieee80211_sta *ista = &sta->sta;
|
|
void *priv_sta = sta->rate_ctrl_priv;
|
|
|
|
ref->ops->free_sta(ref->priv, ista, priv_sta);
|
|
}
|
|
|
|
static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
|
|
{
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
struct rate_control_ref *ref = sta->rate_ctrl;
|
|
if (ref && sta->debugfs_dir && ref->ops->add_sta_debugfs)
|
|
ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
|
|
sta->debugfs_dir);
|
|
#endif
|
|
}
|
|
|
|
extern const struct file_operations rcname_ops;
|
|
|
|
static inline void rate_control_add_debugfs(struct ieee80211_local *local)
|
|
{
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
struct dentry *debugfsdir;
|
|
|
|
if (!local->rate_ctrl)
|
|
return;
|
|
|
|
if (!local->rate_ctrl->ops->add_debugfs)
|
|
return;
|
|
|
|
debugfsdir = debugfs_create_dir("rc", local->hw.wiphy->debugfsdir);
|
|
local->debugfs.rcdir = debugfsdir;
|
|
debugfs_create_file("name", 0400, debugfsdir,
|
|
local->rate_ctrl, &rcname_ops);
|
|
|
|
local->rate_ctrl->ops->add_debugfs(&local->hw, local->rate_ctrl->priv,
|
|
debugfsdir);
|
|
#endif
|
|
}
|
|
|
|
void ieee80211_check_rate_mask(struct ieee80211_sub_if_data *sdata);
|
|
|
|
/* Get a reference to the rate control algorithm. If `name' is NULL, get the
|
|
* first available algorithm. */
|
|
int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
|
|
const char *name);
|
|
void rate_control_deinitialize(struct ieee80211_local *local);
|
|
|
|
|
|
/* Rate control algorithms */
|
|
#ifdef CONFIG_MAC80211_RC_MINSTREL
|
|
int rc80211_minstrel_init(void);
|
|
void rc80211_minstrel_exit(void);
|
|
#else
|
|
static inline int rc80211_minstrel_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void rc80211_minstrel_exit(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
|
|
#endif /* IEEE80211_RATE_H */
|