On Thu, 2009-07-30 at 10:35 -0700, Greg KH wrote:
> On Thu, Jul 30, 2009 at 07:27:29PM +0200, Mike Galbraith wrote:
> > On Thu, 2009-07-30 at 10:07 -0700, Greg KH wrote:
> > > On Thu, Jul 30, 2009 at 07:01:15PM +0200, Mike Galbraith wrote:
> > > > On Thu, 2009-07-30 at 08:22 -0700, Greg KH wrote:
> > > > > On Thu, Jul 30, 2009 at 11:38:55AM +0200, Mike Galbraith wrote:
> > > > > > -------- Forwarded Message --------
> > > > > > From: Mike Galbraith <efault at gmx.de>
> > > > > > To: linux-wireless at vger.kernel.org
> > > > > > Cc: LKML <linux-kernel at vger.kernel.org>, John W. Linville
> > > > > > <linville at tuxdriver.com>
> > > > > > Subject: [wireless] rt2870sta BUGs on shutdown, 2.6.30.2->git.today
> > > > > > +git.wireless.today
> > > > > > Date: Thu, 30 Jul 2009 11:22:54 +0200
> > > > > >
> > > > > > Greetings,
> > > > > >
> > > > > > $subject appears (at glance) to happen because threads have already
> > > > > > exited when we get to BUG_ON(), I haven't pursued it though. Using
> > > > > > rt3070sta instead of rt2870sta works a treat with same box/adapter.
> > > > > >
> > > > > > (the 2009_0521_RT2870_Linux_STA_V2.1.2.0 tree patches and rpm'd up for
> > > > > > opensuse-11.1 with kernels 27->29 doesn't BUG.. for 30 onward, I'm using
> > > > > > the in kernel staging drivers)
> > > > >
> > > > > Yeah, I think we need to just revert that patch, I'll go dig it up and
> > > > > do it later today...
> > > > >
> > > > > Can you test any proposed patches for this?
> > > >
> > > > Sure thing, only takes a couple minutes.
> > >
> > > Great, here's a patch against 2.6.30.1. Let me know if it solves the
> > > problem for you or not.
> >
> > Confirmed. Thanks Greg.
>
> Ok, thanks. I'll port this to .31-rc and also get it into the next
> .30 stable release sometime next week. Thanks for testing.
Perhaps I can save you a couple minutes with a tested .31-rc patch.
(off to wash eyes out with Mr. Proper;)
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 at gmx.de>
Cc: Peter Teoh <htmldeveloper at gmail.com>
Cc: Greg Kroah-Hartman <gregkh at suse.de>
drivers/staging/rt2860/rt_linux.h | 13 +---
drivers/staging/rt2870/2870_main_dev.c | 67 ++++++++++++++++---------
drivers/staging/rt2870/common/2870_rtmp_init.c | 33 +++++-------
drivers/staging/rt2870/common/rtusb_io.c | 3 -
drivers/staging/rt2870/rt2870.h | 6 --
5 files changed, 68 insertions(+), 54 deletions(-)
Index: linux-2.6.31.git/drivers/staging/rt2860/rt_linux.h
===================================================================
--- linux-2.6.31.git.orig/drivers/staging/rt2860/rt_linux.h
+++ linux-2.6.31.git/drivers/staging/rt2860/rt_linux.h
@@ -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>
@@ -166,9 +163,7 @@ typedef int (*HARD_START_XMIT_FUNC)(stru
#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)
@@ -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;
Index: linux-2.6.31.git/drivers/staging/rt2870/2870_main_dev.c
===================================================================
--- linux-2.6.31.git.orig/drivers/staging/rt2870/2870_main_dev.c
+++ linux-2.6.31.git/drivers/staging/rt2870/2870_main_dev.c
@@ -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;
@@ -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;
@@ -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;
@@ -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
@@ -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",
Index: linux-2.6.31.git/drivers/staging/rt2870/common/2870_rtmp_init.c
===================================================================
--- linux-2.6.31.git.orig/drivers/staging/rt2870/common/2870_rtmp_init.c
+++ linux-2.6.31.git/drivers/staging/rt2870/common/2870_rtmp_init.c
@@ -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;
@@ -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;
@@ -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;
@@ -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);
@@ -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;
@@ -804,7 +803,7 @@ 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);
@@ -812,9 +811,9 @@ NDIS_STATUS CreateThreads(
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;
@@ -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);
Index: linux-2.6.31.git/drivers/staging/rt2870/common/rtusb_io.c
===================================================================
--- linux-2.6.31.git.orig/drivers/staging/rt2870/common/rtusb_io.c
+++ linux-2.6.31.git/drivers/staging/rt2870/common/rtusb_io.c
@@ -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)
Index: linux-2.6.31.git/drivers/staging/rt2870/rt2870.h
===================================================================
--- linux-2.6.31.git.orig/drivers/staging/rt2870/rt2870.h
+++ linux-2.6.31.git/drivers/staging/rt2870/rt2870.h
@@ -587,16 +587,14 @@ VOID RTUSBBulkRxComplete(purbb_t pUrb, s
#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
