| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 6 Jun 2016 10:43:54 +0530
From: Binoy Jayan <binoy.jayan@...aro.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Larry Finger <Larry.Finger@...inger.net>
Cc: Jakub Sitnicki <jsitnicki@...il.com>,
Arnd Bergmann <arnd@...db.de>,
driverdev-devel@...uxdriverproject.org,
linux-kernel@...r.kernel.org, Binoy Jayan <binoy.jayan@...aro.org>
Subject: [PATCH v3 3/4] staging: r8188eu: pwrctrl_priv: Replace semaphore 'lock' with mutex
The semaphore 'lock' in pwrctrl_priv is a simple mutex, so it should
be written as one. Semaphores are going away in the future.
_enter_pwrlock was using down_interruptible(), so the lock could be broken
by sending a signal. This could be a bug, because nothing checks the return
code here. Hence, using mutex_lock instead of the interruptible version.
Also, remove the now unused wrappers _init_pwrlock, _enter_pwrlock,
_exit_pwrlock and _rtw_down_sema.
Signed-off-by: Binoy Jayan <binoy.jayan@...aro.org>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Larry Finger <Larry.Finger@...inger.net>
---
drivers/staging/rtl8188eu/core/rtw_pwrctrl.c | 20 ++++++++++----------
drivers/staging/rtl8188eu/include/osdep_service.h | 3 +--
drivers/staging/rtl8188eu/include/rtw_event.h | 1 +
drivers/staging/rtl8188eu/include/rtw_pwrctrl.h | 17 +----------------
drivers/staging/rtl8188eu/os_dep/osdep_service.c | 7 -------
drivers/staging/rtl8188eu/os_dep/usb_intf.c | 8 ++++----
6 files changed, 17 insertions(+), 39 deletions(-)
diff --git a/drivers/staging/rtl8188eu/core/rtw_pwrctrl.c b/drivers/staging/rtl8188eu/core/rtw_pwrctrl.c
index 59c6d8a..0b70fe7 100644
--- a/drivers/staging/rtl8188eu/core/rtw_pwrctrl.c
+++ b/drivers/staging/rtl8188eu/core/rtw_pwrctrl.c
@@ -38,7 +38,7 @@ static int rtw_hw_suspend(struct adapter *padapter)
LeaveAllPowerSaveMode(padapter);
DBG_88E("==> rtw_hw_suspend\n");
- _enter_pwrlock(&pwrpriv->lock);
+ mutex_lock(&pwrpriv->mutex_lock);
pwrpriv->bips_processing = true;
/* s1. */
if (pnetdev) {
@@ -73,7 +73,7 @@ static int rtw_hw_suspend(struct adapter *padapter)
pwrpriv->rf_pwrstate = rf_off;
pwrpriv->bips_processing = false;
- _exit_pwrlock(&pwrpriv->lock);
+ mutex_unlock(&pwrpriv->mutex_lock);
return 0;
@@ -90,12 +90,12 @@ static int rtw_hw_resume(struct adapter *padapter)
/* system resume */
DBG_88E("==> rtw_hw_resume\n");
- _enter_pwrlock(&pwrpriv->lock);
+ mutex_lock(&pwrpriv->mutex_lock);
pwrpriv->bips_processing = true;
rtw_reset_drv_sw(padapter);
if (pm_netdev_open(pnetdev, false) != 0) {
- _exit_pwrlock(&pwrpriv->lock);
+ mutex_unlock(&pwrpriv->mutex_lock);
goto error_exit;
}
@@ -113,7 +113,7 @@ static int rtw_hw_resume(struct adapter *padapter)
pwrpriv->rf_pwrstate = rf_on;
pwrpriv->bips_processing = false;
- _exit_pwrlock(&pwrpriv->lock);
+ mutex_unlock(&pwrpriv->mutex_lock);
return 0;
@@ -138,7 +138,7 @@ void ips_enter(struct adapter *padapter)
return;
}
- _enter_pwrlock(&pwrpriv->lock);
+ mutex_lock(&pwrpriv->mutex_lock);
pwrpriv->bips_processing = true;
@@ -159,7 +159,7 @@ void ips_enter(struct adapter *padapter)
}
pwrpriv->bips_processing = false;
- _exit_pwrlock(&pwrpriv->lock);
+ mutex_unlock(&pwrpriv->mutex_lock);
}
int ips_leave(struct adapter *padapter)
@@ -171,7 +171,7 @@ int ips_leave(struct adapter *padapter)
int keyid;
- _enter_pwrlock(&pwrpriv->lock);
+ mutex_lock(&pwrpriv->mutex_lock);
if ((pwrpriv->rf_pwrstate == rf_off) && (!pwrpriv->bips_processing)) {
pwrpriv->bips_processing = true;
@@ -205,7 +205,7 @@ int ips_leave(struct adapter *padapter)
pwrpriv->bpower_saving = false;
}
- _exit_pwrlock(&pwrpriv->lock);
+ mutex_unlock(&pwrpriv->mutex_lock);
return result;
}
@@ -504,7 +504,7 @@ void rtw_init_pwrctrl_priv(struct adapter *padapter)
{
struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
- _init_pwrlock(&pwrctrlpriv->lock);
+ mutex_init(&pwrctrlpriv->mutex_lock);
pwrctrlpriv->rf_pwrstate = rf_on;
pwrctrlpriv->ips_enter_cnts = 0;
pwrctrlpriv->ips_leave_cnts = 0;
diff --git a/drivers/staging/rtl8188eu/include/osdep_service.h b/drivers/staging/rtl8188eu/include/osdep_service.h
index 5475956..c53c9ea 100644
--- a/drivers/staging/rtl8188eu/include/osdep_service.h
+++ b/drivers/staging/rtl8188eu/include/osdep_service.h
@@ -36,6 +36,7 @@
#include <linux/atomic.h>
#include <linux/io.h>
#include <linux/semaphore.h>
+#include <linux/mutex.h>
#include <linux/sem.h>
#include <linux/sched.h>
#include <linux/etherdevice.h>
@@ -78,8 +79,6 @@ u8 *_rtw_malloc(u32 sz);
void *rtw_malloc2d(int h, int w, int size);
-u32 _rtw_down_sema(struct semaphore *sema);
-
void _rtw_init_queue(struct __queue *pqueue);
struct rtw_netdev_priv_indicator {
diff --git a/drivers/staging/rtl8188eu/include/rtw_event.h b/drivers/staging/rtl8188eu/include/rtw_event.h
index 5c34e56..0dc63f2 100644
--- a/drivers/staging/rtl8188eu/include/rtw_event.h
+++ b/drivers/staging/rtl8188eu/include/rtw_event.h
@@ -19,6 +19,7 @@
#include <wlan_bssdef.h>
#include <linux/semaphore.h>
+#include <linux/mutex.h>
#include <linux/sem.h>
/*
diff --git a/drivers/staging/rtl8188eu/include/rtw_pwrctrl.h b/drivers/staging/rtl8188eu/include/rtw_pwrctrl.h
index 9680e2e..18a9e74 100644
--- a/drivers/staging/rtl8188eu/include/rtw_pwrctrl.h
+++ b/drivers/staging/rtl8188eu/include/rtw_pwrctrl.h
@@ -92,21 +92,6 @@ struct reportpwrstate_parm {
unsigned short rsvd;
};
-static inline void _init_pwrlock(struct semaphore *plock)
-{
- sema_init(plock, 1);
-}
-
-static inline void _enter_pwrlock(struct semaphore *plock)
-{
- _rtw_down_sema(plock);
-}
-
-static inline void _exit_pwrlock(struct semaphore *plock)
-{
- up(plock);
-}
-
#define LPS_DELAY_TIME 1*HZ /* 1 sec */
#define EXE_PWR_NONE 0x01
@@ -157,7 +142,7 @@ enum { /* for ips_mode */
};
struct pwrctrl_priv {
- struct semaphore lock;
+ struct mutex mutex_lock;
volatile u8 rpwm; /* requested power state for fw */
volatile u8 cpwm; /* fw current power state. updated when
* 1. read from HCPWM 2. driver lowers power level */
diff --git a/drivers/staging/rtl8188eu/os_dep/osdep_service.c b/drivers/staging/rtl8188eu/os_dep/osdep_service.c
index 764250b..24d1774 100644
--- a/drivers/staging/rtl8188eu/os_dep/osdep_service.c
+++ b/drivers/staging/rtl8188eu/os_dep/osdep_service.c
@@ -55,13 +55,6 @@ void *rtw_malloc2d(int h, int w, int size)
return a;
}
-u32 _rtw_down_sema(struct semaphore *sema)
-{
- if (down_interruptible(sema))
- return _FAIL;
- return _SUCCESS;
-}
-
void _rtw_init_queue(struct __queue *pqueue)
{
INIT_LIST_HEAD(&(pqueue->queue));
diff --git a/drivers/staging/rtl8188eu/os_dep/usb_intf.c b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
index 11d51a3..a5ba1e4 100644
--- a/drivers/staging/rtl8188eu/os_dep/usb_intf.c
+++ b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
@@ -238,7 +238,7 @@ static int rtw_suspend(struct usb_interface *pusb_intf, pm_message_t message)
rtw_cancel_all_timer(padapter);
LeaveAllPowerSaveMode(padapter);
- _enter_pwrlock(&pwrpriv->lock);
+ mutex_lock(&pwrpriv->mutex_lock);
/* s1. */
if (pnetdev) {
netif_carrier_off(pnetdev);
@@ -267,7 +267,7 @@ static int rtw_suspend(struct usb_interface *pusb_intf, pm_message_t message)
rtw_free_network_queue(padapter, true);
rtw_dev_unload(padapter);
- _exit_pwrlock(&pwrpriv->lock);
+ mutex_unlock(&pwrpriv->mutex_lock);
if (check_fwstate(pmlmepriv, _FW_UNDER_SURVEY))
rtw_indicate_scan_done(padapter, 1);
@@ -298,7 +298,7 @@ static int rtw_resume_process(struct adapter *padapter)
goto exit;
}
- _enter_pwrlock(&pwrpriv->lock);
+ mutex_lock(&pwrpriv->mutex_lock);
rtw_reset_drv_sw(padapter);
pwrpriv->bkeepfwalive = false;
@@ -309,7 +309,7 @@ static int rtw_resume_process(struct adapter *padapter)
netif_device_attach(pnetdev);
netif_carrier_on(pnetdev);
- _exit_pwrlock(&pwrpriv->lock);
+ mutex_unlock(&pwrpriv->mutex_lock);
rtw_roaming(padapter, NULL);
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
Powered by blists - more mailing lists