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Message-ID: <20171005004605.GA22686@beast>
Date: Wed, 4 Oct 2017 17:46:06 -0700
From: Kees Cook <keescook@...omium.org>
To: linux-kernel@...r.kernel.org
Cc: Aditya Shankar <aditya.shankar@...rochip.com>,
Ganesh Krishna <ganesh.krishna@...rochip.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-wireless@...r.kernel.org, devel@...verdev.osuosl.org,
Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] staging/wilc1000: Convert timers to use timer_setup()
As part of removing the timer_list.data field, this converts the wilc1000
driver to using from_timer and an explicit per-timer data field, since
there doesn't appear to be a way to sanely resolve vif from hif_drv.
Cc: Aditya Shankar <aditya.shankar@...rochip.com>
Cc: Ganesh Krishna <ganesh.krishna@...rochip.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-wireless@...r.kernel.org
Cc: devel@...verdev.osuosl.org
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
This requires commit 686fef928bba ("timer: Prepare to change timer
callback argument type") in v4.14-rc3, but should be otherwise
stand-alone.
---
drivers/staging/wilc1000/host_interface.c | 39 +++++++++++++++++--------------
drivers/staging/wilc1000/host_interface.h | 5 ++++
2 files changed, 27 insertions(+), 17 deletions(-)
diff --git a/drivers/staging/wilc1000/host_interface.c b/drivers/staging/wilc1000/host_interface.c
index 7b620658ec38..c16f96308a97 100644
--- a/drivers/staging/wilc1000/host_interface.c
+++ b/drivers/staging/wilc1000/host_interface.c
@@ -238,6 +238,7 @@ static struct completion hif_driver_comp;
static struct completion hif_wait_response;
static struct mutex hif_deinit_lock;
static struct timer_list periodic_rssi;
+static struct wilc_vif *periodic_rssi_vif;
u8 wilc_multicast_mac_addr_list[WILC_MULTICAST_TABLE_SIZE][ETH_ALEN];
@@ -2272,7 +2273,7 @@ static int Handle_RemainOnChan(struct wilc_vif *vif,
ERRORHANDLER:
{
P2P_LISTEN_STATE = 1;
- hif_drv->remain_on_ch_timer.data = (unsigned long)vif;
+ hif_drv->remain_on_ch_timer_vif = vif;
mod_timer(&hif_drv->remain_on_ch_timer,
jiffies +
msecs_to_jiffies(pstrHostIfRemainOnChan->duration));
@@ -2360,11 +2361,13 @@ static u32 Handle_ListenStateExpired(struct wilc_vif *vif,
return result;
}
-static void ListenTimerCB(unsigned long arg)
+static void ListenTimerCB(struct timer_list *t)
{
+ struct host_if_drv *hif_drv = from_timer(hif_drv, t,
+ remain_on_ch_timer);
+ struct wilc_vif *vif = hif_drv->remain_on_ch_timer_vif;
s32 result = 0;
struct host_if_msg msg;
- struct wilc_vif *vif = (struct wilc_vif *)arg;
del_timer(&vif->hif_drv->remain_on_ch_timer);
@@ -2643,9 +2646,10 @@ static void host_if_work(struct work_struct *work)
complete(&hif_thread_comp);
}
-static void TimerCB_Scan(unsigned long arg)
+static void TimerCB_Scan(struct timer_list *t)
{
- struct wilc_vif *vif = (struct wilc_vif *)arg;
+ struct host_if_drv *hif_drv = from_timer(hif_drv, t, scan_timer);
+ struct wilc_vif *vif = hif_drv->scan_timer_vif;
struct host_if_msg msg;
memset(&msg, 0, sizeof(struct host_if_msg));
@@ -2655,9 +2659,11 @@ static void TimerCB_Scan(unsigned long arg)
wilc_enqueue_cmd(&msg);
}
-static void TimerCB_Connect(unsigned long arg)
+static void TimerCB_Connect(struct timer_list *t)
{
- struct wilc_vif *vif = (struct wilc_vif *)arg;
+ struct host_if_drv *hif_drv = from_timer(hif_drv, t,
+ connect_timer);
+ struct wilc_vif *vif = hif_drv->connect_timer_vif;
struct host_if_msg msg;
memset(&msg, 0, sizeof(struct host_if_msg));
@@ -3040,7 +3046,7 @@ int wilc_set_join_req(struct wilc_vif *vif, u8 *bssid, const u8 *ssid,
return -EFAULT;
}
- hif_drv->connect_timer.data = (unsigned long)vif;
+ hif_drv->connect_timer_vif = vif;
mod_timer(&hif_drv->connect_timer,
jiffies + msecs_to_jiffies(HOST_IF_CONNECT_TIMEOUT));
@@ -3283,7 +3289,7 @@ int wilc_scan(struct wilc_vif *vif, u8 scan_source, u8 scan_type,
return -EINVAL;
}
- hif_drv->scan_timer.data = (unsigned long)vif;
+ hif_drv->scan_timer_vif = vif;
mod_timer(&hif_drv->scan_timer,
jiffies + msecs_to_jiffies(HOST_IF_SCAN_TIMEOUT));
@@ -3309,9 +3315,9 @@ int wilc_hif_set_cfg(struct wilc_vif *vif,
return wilc_enqueue_cmd(&msg);
}
-static void GetPeriodicRSSI(unsigned long arg)
+static void GetPeriodicRSSI(struct timer_list *unused)
{
- struct wilc_vif *vif = (struct wilc_vif *)arg;
+ struct wilc_vif *vif = periodic_rssi_vif;
if (!vif->hif_drv) {
netdev_err(vif->ndev, "Driver handler is NULL\n");
@@ -3321,7 +3327,6 @@ static void GetPeriodicRSSI(unsigned long arg)
if (vif->hif_drv->hif_state == HOST_IF_CONNECTED)
wilc_get_statistics(vif, &vif->wilc->dummy_statistics);
- periodic_rssi.data = (unsigned long)vif;
mod_timer(&periodic_rssi, jiffies + msecs_to_jiffies(5000));
}
@@ -3374,14 +3379,14 @@ int wilc_init(struct net_device *dev, struct host_if_drv **hif_drv_handler)
goto _fail_;
}
- setup_timer(&periodic_rssi, GetPeriodicRSSI,
- (unsigned long)vif);
+ periodic_rssi_vif = vif;
+ timer_setup(&periodic_rssi, GetPeriodicRSSI, 0);
mod_timer(&periodic_rssi, jiffies + msecs_to_jiffies(5000));
}
- setup_timer(&hif_drv->scan_timer, TimerCB_Scan, 0);
- setup_timer(&hif_drv->connect_timer, TimerCB_Connect, 0);
- setup_timer(&hif_drv->remain_on_ch_timer, ListenTimerCB, 0);
+ timer_setup(&hif_drv->scan_timer, TimerCB_Scan, 0);
+ timer_setup(&hif_drv->connect_timer, TimerCB_Connect, 0);
+ timer_setup(&hif_drv->remain_on_ch_timer, ListenTimerCB, 0);
mutex_init(&hif_drv->cfg_values_lock);
mutex_lock(&hif_drv->cfg_values_lock);
diff --git a/drivers/staging/wilc1000/host_interface.h b/drivers/staging/wilc1000/host_interface.h
index 1ce5ead318c7..65734c38bf43 100644
--- a/drivers/staging/wilc1000/host_interface.h
+++ b/drivers/staging/wilc1000/host_interface.h
@@ -279,8 +279,13 @@ struct host_if_drv {
struct completion comp_inactive_time;
struct timer_list scan_timer;
+ struct wilc_vif *scan_timer_vif;
+
struct timer_list connect_timer;
+ struct wilc_vif *connect_timer_vif;
+
struct timer_list remain_on_ch_timer;
+ struct wilc_vif *remain_on_ch_timer_vif;
bool IFC_UP;
int driver_handler_id;
--
2.7.4
--
Kees Cook
Pixel Security
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