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Staging: rt2870: Revert d44ca7 Removal of kernel_thread() API
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Staging: rt2870: Revert d44ca7 Removal of kernel_thread() API

The sanity check this patch introduced triggers on shutdown, apparently due to
threads having already exited by the time BUG_ON() is reached.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Peter Teoh <htmldeveloper@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Mike Galbraith authored and Greg Kroah-Hartman committed Aug 7, 2009
1 parent 4d2da07 commit 2c63abf
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Showing 5 changed files with 68 additions and 54 deletions.
13 changes: 4 additions & 9 deletions drivers/staging/rt2860/rt_linux.h
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Original file line number Diff line number Diff line change
Expand Up @@ -43,9 +43,6 @@
#include "rtmp_type.h"
#include <linux/module.h>
#include <linux/kernel.h>
#if !defined(RT2860) && !defined(RT30xx)
#include <linux/kthread.h>
#endif

#include <linux/spinlock.h>
#include <linux/init.h>
Expand Down Expand Up @@ -166,9 +163,7 @@ typedef int (*HARD_START_XMIT_FUNC)(struct sk_buff *skb, struct net_device *net_

#ifndef RT30xx
typedef struct pid * THREAD_PID;
#ifdef RT2860
#define THREAD_PID_INIT_VALUE NULL
#endif
#define GET_PID(_v) find_get_pid(_v)
#define GET_PID_NUMBER(_v) pid_nr(_v)
#define CHECK_PID_LEGALITY(_pid) if (pid_nr(_pid) >= 0)
Expand All @@ -188,12 +183,12 @@ struct os_cookie {
dma_addr_t pAd_pa;
#endif
#ifdef RT2870
struct usb_device *pUsb_Dev;
struct usb_device *pUsb_Dev;

#ifndef RT30xx
struct task_struct *MLMEThr_task;
struct task_struct *RTUSBCmdThr_task;
struct task_struct *TimerQThr_task;
THREAD_PID MLMEThr_pid;
THREAD_PID RTUSBCmdThr_pid;
THREAD_PID TimerQThr_pid;
#endif
#ifdef RT30xx
struct pid *MLMEThr_pid;
Expand Down
67 changes: 45 additions & 22 deletions drivers/staging/rt2870/2870_main_dev.c
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Original file line number Diff line number Diff line change
Expand Up @@ -235,7 +235,7 @@ INT MlmeThread(
DBGPRINT(RT_DEBUG_TRACE,( "<---%s\n",__func__));

#ifndef RT30xx
pObj->MLMEThr_task = NULL;
pObj->MLMEThr_pid = THREAD_PID_INIT_VALUE;
#endif
#ifdef RT30xx
pObj->MLMEThr_pid = NULL;
Expand Down Expand Up @@ -348,7 +348,7 @@ INT RTUSBCmdThread(
DBGPRINT(RT_DEBUG_TRACE,( "<---RTUSBCmdThread\n"));

#ifndef RT30xx
pObj->RTUSBCmdThr_task = NULL;
pObj->RTUSBCmdThr_pid = THREAD_PID_INIT_VALUE;
#endif
#ifdef RT30xx
pObj->RTUSBCmdThr_pid = NULL;
Expand Down Expand Up @@ -447,7 +447,7 @@ INT TimerQThread(
DBGPRINT(RT_DEBUG_TRACE,( "<---%s\n",__func__));

#ifndef RT30xx
pObj->TimerQThr_task = NULL;
pObj->TimerQThr_pid = THREAD_PID_INIT_VALUE;
#endif
#ifdef RT30xx
pObj->TimerQThr_pid = NULL;
Expand Down Expand Up @@ -883,46 +883,69 @@ VOID RT28xxThreadTerminate(

// Terminate Threads
#ifndef RT30xx
BUG_ON(pObj->TimerQThr_task == NULL);
CHECK_PID_LEGALITY(task_pid(pObj->TimerQThr_task))
CHECK_PID_LEGALITY(pObj->TimerQThr_pid)
{
POS_COOKIE pObj = (POS_COOKIE)pAd->OS_Cookie;

printk(KERN_DEBUG "Terminate the TimerQThr pid=%d!\n",
pid_nr(task_pid(pObj->TimerQThr_task)));
printk("Terminate the TimerQThr_pid=%d!\n", GET_PID_NUMBER(pObj->TimerQThr_pid));
mb();
pAd->TimerFunc_kill = 1;
mb();
kthread_stop(pObj->TimerQThr_task);
pObj->TimerQThr_task = NULL;
ret = KILL_THREAD_PID(pObj->TimerQThr_pid, SIGTERM, 1);
if (ret)
{
printk(KERN_WARNING "%s: unable to stop TimerQThread, pid=%d, ret=%d!\n",
pAd->net_dev->name, GET_PID_NUMBER(pObj->TimerQThr_pid), ret);
}
else
{
wait_for_completion(&pAd->TimerQComplete);
pObj->TimerQThr_pid = THREAD_PID_INIT_VALUE;
}
}

BUG_ON(pObj->MLMEThr_task == NULL);
CHECK_PID_LEGALITY(task_pid(pObj->MLMEThr_task))
CHECK_PID_LEGALITY(pObj->MLMEThr_pid)
{
printk(KERN_DEBUG "Terminate the MLMEThr pid=%d!\n",
pid_nr(task_pid(pObj->MLMEThr_task)));
printk("Terminate the MLMEThr_pid=%d!\n", GET_PID_NUMBER(pObj->MLMEThr_pid));
mb();
pAd->mlme_kill = 1;
//RT28XX_MLME_HANDLER(pAd);
mb();
kthread_stop(pObj->MLMEThr_task);
pObj->MLMEThr_task = NULL;
ret = KILL_THREAD_PID(pObj->MLMEThr_pid, SIGTERM, 1);
if (ret)
{
printk (KERN_WARNING "%s: unable to Mlme thread, pid=%d, ret=%d!\n",
pAd->net_dev->name, GET_PID_NUMBER(pObj->MLMEThr_pid), ret);
}
else
{
//wait_for_completion (&pAd->notify);
wait_for_completion (&pAd->mlmeComplete);
pObj->MLMEThr_pid = THREAD_PID_INIT_VALUE;
}
}

BUG_ON(pObj->RTUSBCmdThr_task == NULL);
CHECK_PID_LEGALITY(task_pid(pObj->RTUSBCmdThr_task))
CHECK_PID_LEGALITY(pObj->RTUSBCmdThr_pid)
{
printk(KERN_DEBUG "Terminate the RTUSBCmdThr pid=%d!\n",
pid_nr(task_pid(pObj->RTUSBCmdThr_task)));
printk("Terminate the RTUSBCmdThr_pid=%d!\n", GET_PID_NUMBER(pObj->RTUSBCmdThr_pid));
mb();
NdisAcquireSpinLock(&pAd->CmdQLock);
pAd->CmdQ.CmdQState = RT2870_THREAD_STOPED;
NdisReleaseSpinLock(&pAd->CmdQLock);
mb();
//RTUSBCMDUp(pAd);
kthread_stop(pObj->RTUSBCmdThr_task);
pObj->RTUSBCmdThr_task = NULL;
ret = KILL_THREAD_PID(pObj->RTUSBCmdThr_pid, SIGTERM, 1);
if (ret)
{
printk(KERN_WARNING "%s: unable to RTUSBCmd thread, pid=%d, ret=%d!\n",
pAd->net_dev->name, GET_PID_NUMBER(pObj->RTUSBCmdThr_pid), ret);
}
else
{
//wait_for_completion (&pAd->notify);
wait_for_completion (&pAd->CmdQComplete);
pObj->RTUSBCmdThr_pid = THREAD_PID_INIT_VALUE;
}
}
#endif
#ifdef RT30xx
Expand Down Expand Up @@ -1045,7 +1068,7 @@ BOOLEAN RT28XXChipsetCheck(
dev_p->descriptor.idProduct == rtusb_usb_id[i].idProduct)
{
#ifndef RT30xx
printk(KERN_DEBUG "rt2870: idVendor = 0x%x, idProduct = 0x%x\n",
printk("rt2870: idVendor = 0x%x, idProduct = 0x%x\n",
#endif
#ifdef RT30xx
printk("rt2870: idVendor = 0x%x, idProduct = 0x%x\n",
Expand Down
33 changes: 16 additions & 17 deletions drivers/staging/rt2870/common/2870_rtmp_init.c
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Original file line number Diff line number Diff line change
Expand Up @@ -700,8 +700,8 @@ NDIS_STATUS AdapterBlockAllocateMemory(
usb_dev = pObj->pUsb_Dev;

#ifndef RT30xx
pObj->MLMEThr_task = NULL;
pObj->RTUSBCmdThr_task = NULL;
pObj->MLMEThr_pid = THREAD_PID_INIT_VALUE;
pObj->RTUSBCmdThr_pid = THREAD_PID_INIT_VALUE;
#endif
#ifdef RT30xx
pObj->MLMEThr_pid = NULL;
Expand Down Expand Up @@ -743,7 +743,7 @@ NDIS_STATUS CreateThreads(
PRTMP_ADAPTER pAd = net_dev->ml_priv;
POS_COOKIE pObj = (POS_COOKIE) pAd->OS_Cookie;
#ifndef RT30xx
struct task_struct *tsk;
pid_t pid_number = -1;
#endif
#ifdef RT30xx
pid_t pid_number;
Expand All @@ -762,10 +762,10 @@ NDIS_STATUS CreateThreads(

// Creat MLME Thread
#ifndef RT30xx
pObj->MLMEThr_task = NULL;
tsk = kthread_run(MlmeThread, pAd, "%s", pAd->net_dev->name);

if (IS_ERR(tsk)) {
pObj->MLMEThr_pid= THREAD_PID_INIT_VALUE;
pid_number = kernel_thread(MlmeThread, pAd, CLONE_VM);
if (pid_number < 0)
{
#endif
#ifdef RT30xx
pObj->MLMEThr_pid = NULL;
Expand All @@ -778,7 +778,7 @@ NDIS_STATUS CreateThreads(
}

#ifndef RT30xx
pObj->MLMEThr_task = tsk;
pObj->MLMEThr_pid = GET_PID(pid_number);
#endif
#ifdef RT30xx
pObj->MLMEThr_pid = find_get_pid(pid_number);
Expand All @@ -788,10 +788,9 @@ NDIS_STATUS CreateThreads(

// Creat Command Thread
#ifndef RT30xx
pObj->RTUSBCmdThr_task = NULL;
tsk = kthread_run(RTUSBCmdThread, pAd, "%s", pAd->net_dev->name);

if (IS_ERR(tsk) < 0)
pObj->RTUSBCmdThr_pid= THREAD_PID_INIT_VALUE;
pid_number = kernel_thread(RTUSBCmdThread, pAd, CLONE_VM);
if (pid_number < 0)
#endif
#ifdef RT30xx
pObj->RTUSBCmdThr_pid = NULL;
Expand All @@ -804,17 +803,17 @@ NDIS_STATUS CreateThreads(
}

#ifndef RT30xx
pObj->RTUSBCmdThr_task = tsk;
pObj->RTUSBCmdThr_pid = GET_PID(pid_number);
#endif
#ifdef RT30xx
pObj->RTUSBCmdThr_pid = find_get_pid(pid_number);
#endif
wait_for_completion(&(pAd->CmdQComplete));

#ifndef RT30xx
pObj->TimerQThr_task = NULL;
tsk = kthread_run(TimerQThread, pAd, "%s", pAd->net_dev->name);
if (IS_ERR(tsk) < 0)
pObj->TimerQThr_pid= THREAD_PID_INIT_VALUE;
pid_number = kernel_thread(TimerQThread, pAd, CLONE_VM);
if (pid_number < 0)
#endif
#ifdef RT30xx
pObj->TimerQThr_pid = NULL;
Expand All @@ -826,7 +825,7 @@ NDIS_STATUS CreateThreads(
return NDIS_STATUS_FAILURE;
}
#ifndef RT30xx
pObj->TimerQThr_task = tsk;
pObj->TimerQThr_pid = GET_PID(pid_number);
#endif
#ifdef RT30xx
pObj->TimerQThr_pid = find_get_pid(pid_number);
Expand Down
3 changes: 1 addition & 2 deletions drivers/staging/rt2870/common/rtusb_io.c
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Original file line number Diff line number Diff line change
Expand Up @@ -984,8 +984,7 @@ NDIS_STATUS RTUSBEnqueueCmdFromNdis(
POS_COOKIE pObj = (POS_COOKIE) pAd->OS_Cookie;

#ifndef RT30xx
BUG_ON(pObj->RTUSBCmdThr_task == NULL);
CHECK_PID_LEGALITY(task_pid(pObj->RTUSBCmdThr_task))
CHECK_PID_LEGALITY(pObj->RTUSBCmdThr_pid)
#endif
#ifdef RT30xx
if (pObj->RTUSBCmdThr_pid < 0)
Expand Down
6 changes: 2 additions & 4 deletions drivers/staging/rt2870/rt2870.h
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Original file line number Diff line number Diff line change
Expand Up @@ -590,16 +590,14 @@ VOID RTUSBBulkRxComplete(purbb_t pUrb, struct pt_regs *pt_regs);
#define RTUSBMlmeUp(pAd) \
{ \
POS_COOKIE pObj = (POS_COOKIE) pAd->OS_Cookie; \
BUG_ON(pObj->MLMEThr_task == NULL); \
CHECK_PID_LEGALITY(task_pid(pObj->MLMEThr_task)) \
CHECK_PID_LEGALITY(pObj->MLMEThr_pid) \
up(&(pAd->mlme_semaphore)); \
}

#define RTUSBCMDUp(pAd) \
{ \
POS_COOKIE pObj = (POS_COOKIE) pAd->OS_Cookie; \
BUG_ON(pObj->RTUSBCmdThr_task == NULL); \
CHECK_PID_LEGALITY(task_pid(pObj->RTUSBCmdThr_task)) \
CHECK_PID_LEGALITY(pObj->RTUSBCmdThr_pid) \
up(&(pAd->RTUSBCmd_semaphore)); \
}
#endif
Expand Down

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