diff options
Diffstat (limited to 'drivers/pci/hotplug/ibmphp_hpc.c')
| -rw-r--r-- | drivers/pci/hotplug/ibmphp_hpc.c | 57 |
1 files changed, 12 insertions, 45 deletions
diff --git a/drivers/pci/hotplug/ibmphp_hpc.c b/drivers/pci/hotplug/ibmphp_hpc.c index d06ccb69e411..c31e7bf34502 100644 --- a/drivers/pci/hotplug/ibmphp_hpc.c +++ b/drivers/pci/hotplug/ibmphp_hpc.c @@ -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; } @@ -1050,47 +1044,20 @@ static int process_changeinlatch (u8 old, u8 new, struct controller *ctrl) } /*---------------------------------------------------------------------- -* 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 * * Action: start polling thread *---------------------------------------------------------------------*/ 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"); |