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pci: hotplug: ibmphp: convert to kthread 

Convert ibmphp to new kthread api

Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Kristen Carlson Accardi 2007-08-14 16:07:00 -07:00 committed by Greg Kroah-Hartman
parent 229f5afded
commit 2d100fe8f6
1 changed files with 12 additions and 45 deletions
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57
drivers/pci/hotplug/ibmphp_hpc.c
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@ -35,7 +35,7 @@
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/kthread.h>
#include "ibmphp.h"
static int to_debug = 0;
@ -101,12 +101,11 @@ static int to_debug = 0;
//----------------------------------------------------------------------------
// global variables
//----------------------------------------------------------------------------
static int ibmphp_shutdown;
static int tid_poll;
static struct mutex sem_hpcaccess; // lock access to HPC
static struct semaphore semOperations; // lock all operations and
// access to data structures
static struct semaphore sem_exit; // make sure polling thread goes away
static struct task_struct *ibmphp_poll_thread;
//----------------------------------------------------------------------------
// local function prototypes
//----------------------------------------------------------------------------
@ -116,10 +115,9 @@ static u8 hpc_writecmdtoindex (u8, u8);
static u8 hpc_readcmdtoindex (u8, u8);
static void get_hpc_access (void);
static void free_hpc_access (void);
static void poll_hpc (void);
static int poll_hpc(void *data);
static int process_changeinstatus (struct slot *, struct slot *);
static int process_changeinlatch (u8, u8, struct controller *);
static int hpc_poll_thread (void *);
static int hpc_wait_ctlr_notworking (int, struct controller *, void __iomem *, u8 *);
//----------------------------------------------------------------------------
@ -137,8 +135,6 @@ void __init ibmphp_hpc_initvars (void)
init_MUTEX (&semOperations);
init_MUTEX_LOCKED (&sem_exit);
to_debug = 0;
ibmphp_shutdown = 0;
tid_poll = 0;
debug ("%s - Exit\n", __FUNCTION__);
}
@ -819,7 +815,7 @@ void ibmphp_unlock_operations (void)
#define POLL_LATCH_REGISTER 0
#define POLL_SLOTS 1
#define POLL_SLEEP 2
static void poll_hpc (void)
static int poll_hpc(void *data)
{
struct slot myslot;
struct slot *pslot = NULL;
@ -833,10 +829,7 @@ static void poll_hpc (void)
debug ("%s - Entry\n", __FUNCTION__);
while (!ibmphp_shutdown) {
if (ibmphp_shutdown)
break;
while (!kthread_should_stop()) {
/* try to get the lock to do some kind of hardware access */
down (&semOperations);
@ -896,7 +889,7 @@ static void poll_hpc (void)
up (&semOperations);
msleep(POLL_INTERVAL_SEC * 1000);
if (ibmphp_shutdown)
if (kthread_should_stop())
break;
down (&semOperations);
@ -915,6 +908,7 @@ static void poll_hpc (void)
}
up (&sem_exit);
debug ("%s - Exit\n", __FUNCTION__);
return 0;
}
@ -1049,29 +1043,6 @@ static int process_changeinlatch (u8 old, u8 new, struct controller *ctrl)
return rc;
}
/*----------------------------------------------------------------------
* Name: hpc_poll_thread
*
* Action: polling
*
* Return 0
* Value:
*---------------------------------------------------------------------*/
static int hpc_poll_thread (void *data)
{
debug ("%s - Entry\n", __FUNCTION__);
daemonize("hpc_poll");
allow_signal(SIGKILL);
poll_hpc ();
tid_poll = 0;
debug ("%s - Exit\n", __FUNCTION__);
return 0;
}
/*----------------------------------------------------------------------
* Name: ibmphp_hpc_start_poll_thread
*
@ -1079,18 +1050,14 @@ static int hpc_poll_thread (void *data)
*---------------------------------------------------------------------*/
int __init ibmphp_hpc_start_poll_thread (void)
{
int rc = 0;
debug ("%s - Entry\n", __FUNCTION__);
tid_poll = kernel_thread (hpc_poll_thread, NULL, 0);
if (tid_poll < 0) {
ibmphp_poll_thread = kthread_run(poll_hpc, NULL, "hpc_poll");
if (IS_ERR(ibmphp_poll_thread)) {
err ("%s - Error, thread not started\n", __FUNCTION__);
rc = -1;
return PTR_ERR(ibmphp_poll_thread);
}
debug ("%s - Exit tid_poll[%d] rc[%d]\n", __FUNCTION__, tid_poll, rc);
return rc;
return 0;
}
/*----------------------------------------------------------------------
@ -1102,7 +1069,7 @@ void __exit ibmphp_hpc_stop_poll_thread (void)
{
debug ("%s - Entry\n", __FUNCTION__);
ibmphp_shutdown = 1;
kthread_stop(ibmphp_poll_thread);
debug ("before locking operations \n");
ibmphp_lock_operations ();
debug ("after locking operations \n");