From: Shuah Khan <skhan@linuxfoundation.org>
To: gregkh@linuxfoundation.org, keescook@chromium.org, peterz@infradead.org
Cc: Shuah Khan <skhan@linuxfoundation.org>,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: [PATCH 11/13] drivers/staging/rtl8188eu: convert stats to use seqnum_ops
Date: Tue, 10 Nov 2020 12:53:37 -0700 [thread overview]
Message-ID: <07ada10228dbd8d8954a30d6604fef2db762be69.1605027593.git.skhan@linuxfoundation.org> (raw)
In-Reply-To: <cover.1605027593.git.skhan@linuxfoundation.org>
seqnum_ops api is introduced to be used when a variable is used as
a sequence/stat counter and doesn't guard object lifetimes. This
clearly differentiates atomic_t usages that guard object lifetimes.
seqnum32 variables wrap around to INT_MIN when it overflows and
should not be used to guard resource lifetimes, device usage and
open counts that control state changes, and pm states.
atomic_t variables used for stats are atomic counters. Overflow will
wrap around and reset the stats and no change with the conversion.
Convert them to use seqnum_ops. This conversion replaces inc_return()
with _inc() followed by _read().
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
drivers/staging/rtl8188eu/core/rtw_mlme_ext.c | 23 ++++++++++++++-----
.../staging/rtl8188eu/include/rtw_mlme_ext.h | 3 ++-
2 files changed, 19 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
index b3eddcb83cd0..31dd9d31dd9a 100644
--- a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
@@ -7,6 +7,7 @@
#define _RTW_MLME_EXT_C_
#include <linux/ieee80211.h>
+#include <linux/seqnum_ops.h>
#include <asm/unaligned.h>
#include <osdep_service.h>
@@ -3860,7 +3861,7 @@ static void init_mlme_ext_priv_value(struct adapter *padapter)
_12M_RATE_, _24M_RATE_, 0xff,
};
- atomic_set(&pmlmeext->event_seq, 0);
+ seqnum32_set(&pmlmeext->event_seq, 0);
pmlmeext->mgnt_seq = 0;/* reset to zero when disconnect at client mode */
pmlmeext->cur_channel = padapter->registrypriv.channel;
@@ -4189,7 +4190,9 @@ void report_survey_event(struct adapter *padapter,
pc2h_evt_hdr = (struct C2HEvent_Header *)(pevtcmd);
pc2h_evt_hdr->len = sizeof(struct survey_event);
pc2h_evt_hdr->ID = _Survey_EVT_;
- pc2h_evt_hdr->seq = atomic_inc_return(&pmlmeext->event_seq);
+
+ seqnum32_inc(&pmlmeext->event_seq);
+ pc2h_evt_hdr->seq = seqnum32_read(&pmlmeext->event_seq);
psurvey_evt = (struct survey_event *)(pevtcmd + sizeof(struct C2HEvent_Header));
@@ -4239,7 +4242,9 @@ void report_surveydone_event(struct adapter *padapter)
pc2h_evt_hdr = (struct C2HEvent_Header *)(pevtcmd);
pc2h_evt_hdr->len = sizeof(struct surveydone_event);
pc2h_evt_hdr->ID = _SurveyDone_EVT_;
- pc2h_evt_hdr->seq = atomic_inc_return(&pmlmeext->event_seq);
+
+ seqnum32_inc(&pmlmeext->event_seq);
+ pc2h_evt_hdr->seq = seqnum32_read(&pmlmeext->event_seq);
psurveydone_evt = (struct surveydone_event *)(pevtcmd + sizeof(struct C2HEvent_Header));
psurveydone_evt->bss_cnt = pmlmeext->sitesurvey_res.bss_cnt;
@@ -4283,7 +4288,9 @@ void report_join_res(struct adapter *padapter, int res)
pc2h_evt_hdr = (struct C2HEvent_Header *)(pevtcmd);
pc2h_evt_hdr->len = sizeof(struct joinbss_event);
pc2h_evt_hdr->ID = _JoinBss_EVT_;
- pc2h_evt_hdr->seq = atomic_inc_return(&pmlmeext->event_seq);
+
+ seqnum32_inc(&pmlmeext->event_seq);
+ pc2h_evt_hdr->seq = seqnum32_read(&pmlmeext->event_seq);
pjoinbss_evt = (struct joinbss_event *)(pevtcmd + sizeof(struct C2HEvent_Header));
memcpy((unsigned char *)(&pjoinbss_evt->network.network), &pmlmeinfo->network, sizeof(struct wlan_bssid_ex));
@@ -4333,7 +4340,9 @@ void report_del_sta_event(struct adapter *padapter, unsigned char *MacAddr,
pc2h_evt_hdr = (struct C2HEvent_Header *)(pevtcmd);
pc2h_evt_hdr->len = sizeof(struct stadel_event);
pc2h_evt_hdr->ID = _DelSTA_EVT_;
- pc2h_evt_hdr->seq = atomic_inc_return(&pmlmeext->event_seq);
+
+ seqnum32_inc(&pmlmeext->event_seq);
+ pc2h_evt_hdr->seq = seqnum32_read(&pmlmeext->event_seq);
pdel_sta_evt = (struct stadel_event *)(pevtcmd + sizeof(struct C2HEvent_Header));
ether_addr_copy((unsigned char *)(&pdel_sta_evt->macaddr), MacAddr);
@@ -4386,7 +4395,9 @@ void report_add_sta_event(struct adapter *padapter, unsigned char *MacAddr,
pc2h_evt_hdr = (struct C2HEvent_Header *)(pevtcmd);
pc2h_evt_hdr->len = sizeof(struct stassoc_event);
pc2h_evt_hdr->ID = _AddSTA_EVT_;
- pc2h_evt_hdr->seq = atomic_inc_return(&pmlmeext->event_seq);
+
+ seqnum32_inc(&pmlmeext->event_seq);
+ pc2h_evt_hdr->seq = seqnum32_read(&pmlmeext->event_seq);
padd_sta_evt = (struct stassoc_event *)(pevtcmd + sizeof(struct C2HEvent_Header));
ether_addr_copy((unsigned char *)(&padd_sta_evt->macaddr), MacAddr);
diff --git a/drivers/staging/rtl8188eu/include/rtw_mlme_ext.h b/drivers/staging/rtl8188eu/include/rtw_mlme_ext.h
index b11a6886a083..09b7e3bb2738 100644
--- a/drivers/staging/rtl8188eu/include/rtw_mlme_ext.h
+++ b/drivers/staging/rtl8188eu/include/rtw_mlme_ext.h
@@ -7,6 +7,7 @@
#ifndef __RTW_MLME_EXT_H_
#define __RTW_MLME_EXT_H_
+#include <linux/seqnum_ops.h>
#include <osdep_service.h>
#include <drv_types.h>
#include <wlan_bssdef.h>
@@ -393,7 +394,7 @@ struct p2p_oper_class_map {
struct mlme_ext_priv {
struct adapter *padapter;
u8 mlmeext_init;
- atomic_t event_seq;
+ struct seqnum32 event_seq;
u16 mgnt_seq;
unsigned char cur_channel;
--
2.27.0
next prev parent reply other threads:[~2020-11-10 19:55 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-10 19:53 [PATCH 00/13] Introduce seqnum_ops Shuah Khan
2020-11-10 19:53 ` [PATCH 01/13] seqnum_ops: Introduce Sequence Number Ops Shuah Khan
2020-11-10 20:41 ` Greg KH
2020-11-10 20:43 ` Greg KH
2020-11-11 0:18 ` Kees Cook
2020-11-11 19:23 ` Shuah Khan
2020-11-12 12:36 ` Matthew Wilcox
2020-11-12 16:17 ` Shuah Khan
2020-11-12 16:45 ` Greg KH
2020-11-12 16:59 ` Shuah Khan
2020-11-12 21:27 ` Shuah Khan
2020-11-17 12:27 ` Peter Zijlstra
2020-11-10 21:03 ` Matthew Wilcox
2020-11-10 22:58 ` Shuah Khan
2020-11-11 0:20 ` Kees Cook
2020-11-11 15:42 ` Shuah Khan
2020-11-11 8:23 ` Peter Zijlstra
2020-11-11 15:56 ` Shuah Khan
2020-11-11 16:04 ` Peter Zijlstra
2020-11-11 17:34 ` Shuah Khan
2020-11-11 17:50 ` Peter Zijlstra
2020-11-11 18:28 ` Shuah Khan
2020-11-11 20:15 ` Peter Zijlstra
2020-11-12 13:29 ` Greg KH
2020-11-10 19:53 ` [PATCH 02/13] selftests:lib:test_seqnum_ops: add new test for seqnum_ops Shuah Khan
2020-11-10 19:53 ` [PATCH 03/13] drivers/acpi: convert seqno seqnum_ops Shuah Khan
2020-11-10 19:53 ` [PATCH 04/13] drivers/acpi/apei: convert seqno to seqnum_ops Shuah Khan
2020-11-10 19:53 ` [PATCH 05/13] drivers/base/test/test_async_driver_probe: convert to use seqnum_ops Shuah Khan
2020-11-10 19:53 ` [PATCH 06/13] drivers/char/ipmi: convert stats " Shuah Khan
2020-11-10 19:53 ` [PATCH 07/13] drivers/edac: convert pci counters to seqnum_ops Shuah Khan
2020-11-10 19:53 ` [PATCH 08/13] drivers/oprofile: convert stats to use seqnum_ops Shuah Khan
2020-11-10 19:53 ` [PATCH 09/13] drivers/staging/rtl8723bs: " Shuah Khan
2020-11-10 19:53 ` [PATCH 10/13] usb: usbip/vhci: convert seqno to seqnum_ops Shuah Khan
2020-11-10 19:53 ` Shuah Khan [this message]
2020-11-10 19:53 ` [PATCH 12/13] drivers/staging/unisys/visorhba: convert stats to use seqnum_ops Shuah Khan
2020-11-10 20:42 ` Greg KH
2020-11-10 21:02 ` Shuah Khan
2020-11-10 19:53 ` [PATCH 13/13] security/integrity/ima: converts stats to seqnum_ops Shuah Khan
2020-11-10 20:44 ` [PATCH 00/13] Introduce seqnum_ops Alan Stern
2020-11-10 22:42 ` Shuah Khan
2020-11-11 4:33 ` Matthew Wilcox
2020-11-11 16:03 ` Shuah Khan
2020-11-11 16:41 ` Matthew Wilcox
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