From: Herbert Poetzl Date: Thu, 8 Feb 2007 17:32:43 +0000 (-0300) Subject: V4L/DVB (5208): Kthread API conversion for dvb_frontend and av7110 X-Git-Tag: v2.6.21-rc2~66^2~35 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8eec14295e03f9dfe2be7bb75c8004a5fa867cdb;p=linux-2.6 V4L/DVB (5208): Kthread API conversion for dvb_frontend and av7110 dvb kernel_thread to kthread API port. It is running fine here, including module load/unload and software suspend (which doesn't work as expected with or without this patch :). I didn't convert the dvb_ca_en50221 as I do not have such an interface, but if the conversion process is fine with the v4l-dvb maintainers, it should not be a problem to send a patch for that too ... Acked-by: Oliver Endriss Signed-off-by: Herbert Poetzl Signed-off-by: Andrew Morton Acked-by: Oliver Endriss Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c index 7c42d53a1c..470ae167be 100644 --- a/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include "dvb_frontend.h" @@ -100,7 +101,7 @@ struct dvb_frontend_private { struct semaphore sem; struct list_head list_head; wait_queue_head_t wait_queue; - pid_t thread_pid; + struct task_struct *thread; unsigned long release_jiffies; unsigned int exit; unsigned int wakeup; @@ -508,19 +509,11 @@ static int dvb_frontend_thread(void *data) struct dvb_frontend *fe = data; struct dvb_frontend_private *fepriv = fe->frontend_priv; unsigned long timeout; - char name [15]; fe_status_t s; struct dvb_frontend_parameters *params; dprintk("%s\n", __FUNCTION__); - snprintf (name, sizeof(name), "kdvb-fe-%i", fe->dvb->num); - - lock_kernel(); - daemonize(name); - sigfillset(¤t->blocked); - unlock_kernel(); - fepriv->check_wrapped = 0; fepriv->quality = 0; fepriv->delay = 3*HZ; @@ -534,14 +527,16 @@ static int dvb_frontend_thread(void *data) up(&fepriv->sem); /* is locked when we enter the thread... */ timeout = wait_event_interruptible_timeout(fepriv->wait_queue, - dvb_frontend_should_wakeup(fe), - fepriv->delay); - if (0 != dvb_frontend_is_exiting(fe)) { + dvb_frontend_should_wakeup(fe) || kthread_should_stop(), + fepriv->delay); + + if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { /* got signal or quitting */ break; } - try_to_freeze(); + if (try_to_freeze()) + continue; if (down_interruptible(&fepriv->sem)) break; @@ -591,7 +586,7 @@ static int dvb_frontend_thread(void *data) fe->ops.sleep(fe); } - fepriv->thread_pid = 0; + fepriv->thread = NULL; mb(); dvb_frontend_wakeup(fe); @@ -600,7 +595,6 @@ static int dvb_frontend_thread(void *data) static void dvb_frontend_stop(struct dvb_frontend *fe) { - unsigned long ret; struct dvb_frontend_private *fepriv = fe->frontend_priv; dprintk ("%s\n", __FUNCTION__); @@ -608,33 +602,17 @@ static void dvb_frontend_stop(struct dvb_frontend *fe) fepriv->exit = 1; mb(); - if (!fepriv->thread_pid) + if (!fepriv->thread) return; - /* check if the thread is really alive */ - if (kill_proc(fepriv->thread_pid, 0, 1) == -ESRCH) { - printk("dvb_frontend_stop: thread PID %d already died\n", - fepriv->thread_pid); - /* make sure the mutex was not held by the thread */ - init_MUTEX (&fepriv->sem); - return; - } - - /* wake up the frontend thread, so it notices that fe->exit == 1 */ - dvb_frontend_wakeup(fe); - - /* wait until the frontend thread has exited */ - ret = wait_event_interruptible(fepriv->wait_queue,0 == fepriv->thread_pid); - if (-ERESTARTSYS != ret) { - fepriv->state = FESTATE_IDLE; - return; - } + kthread_stop(fepriv->thread); + init_MUTEX (&fepriv->sem); fepriv->state = FESTATE_IDLE; /* paranoia check in case a signal arrived */ - if (fepriv->thread_pid) - printk("dvb_frontend_stop: warning: thread PID %d won't exit\n", - fepriv->thread_pid); + if (fepriv->thread) + printk("dvb_frontend_stop: warning: thread %p won't exit\n", + fepriv->thread); } s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) @@ -684,10 +662,11 @@ static int dvb_frontend_start(struct dvb_frontend *fe) { int ret; struct dvb_frontend_private *fepriv = fe->frontend_priv; + struct task_struct *fe_thread; dprintk ("%s\n", __FUNCTION__); - if (fepriv->thread_pid) { + if (fepriv->thread) { if (!fepriv->exit) return 0; else @@ -701,18 +680,18 @@ static int dvb_frontend_start(struct dvb_frontend *fe) fepriv->state = FESTATE_IDLE; fepriv->exit = 0; - fepriv->thread_pid = 0; + fepriv->thread = NULL; mb(); - ret = kernel_thread (dvb_frontend_thread, fe, 0); - - if (ret < 0) { - printk("dvb_frontend_start: failed to start kernel_thread (%d)\n", ret); + fe_thread = kthread_run(dvb_frontend_thread, fe, + "kdvb-fe-%i", fe->dvb->num); + if (IS_ERR(fe_thread)) { + ret = PTR_ERR(fe_thread); + printk("dvb_frontend_start: failed to start kthread (%d)\n", ret); up(&fepriv->sem); return ret; } - fepriv->thread_pid = ret; - + fepriv->thread = fe_thread; return 0; } diff --git a/drivers/media/dvb/ttpci/av7110.c b/drivers/media/dvb/ttpci/av7110.c index bb213d836c..29ed532ba9 100644 --- a/drivers/media/dvb/ttpci/av7110.c +++ b/drivers/media/dvb/ttpci/av7110.c @@ -51,6 +51,7 @@ #include #include #include +#include #include @@ -223,11 +224,10 @@ static void recover_arm(struct av7110 *av7110) static void av7110_arm_sync(struct av7110 *av7110) { - av7110->arm_rmmod = 1; - wake_up_interruptible(&av7110->arm_wait); + if (av7110->arm_thread) + kthread_stop(av7110->arm_thread); - while (av7110->arm_thread) - msleep(1); + av7110->arm_thread = NULL; } static int arm_thread(void *data) @@ -238,17 +238,11 @@ static int arm_thread(void *data) dprintk(4, "%p\n",av7110); - lock_kernel(); - daemonize("arm_mon"); - sigfillset(¤t->blocked); - unlock_kernel(); - - av7110->arm_thread = current; - for (;;) { timeout = wait_event_interruptible_timeout(av7110->arm_wait, - av7110->arm_rmmod, 5 * HZ); - if (-ERESTARTSYS == timeout || av7110->arm_rmmod) { + kthread_should_stop(), 5 * HZ); + + if (-ERESTARTSYS == timeout || kthread_should_stop()) { /* got signal or told to quit*/ break; } @@ -276,7 +270,6 @@ static int arm_thread(void *data) av7110->arm_errors = 0; } - av7110->arm_thread = NULL; return 0; } @@ -2338,6 +2331,7 @@ static int __devinit av7110_attach(struct saa7146_dev* dev, const int length = TS_WIDTH * TS_HEIGHT; struct pci_dev *pdev = dev->pci; struct av7110 *av7110; + struct task_struct *thread; int ret, count = 0; dprintk(4, "dev: %p\n", dev); @@ -2622,9 +2616,12 @@ static int __devinit av7110_attach(struct saa7146_dev* dev, printk ("dvb-ttpci: Warning, firmware version 0x%04x is too old. " "System might be unstable!\n", FW_VERSION(av7110->arm_app)); - ret = kernel_thread(arm_thread, (void *) av7110, 0); - if (ret < 0) + thread = kthread_run(arm_thread, (void *) av7110, "arm_mon"); + if (IS_ERR(thread)) { + ret = PTR_ERR(thread); goto err_stop_arm_9; + } + av7110->arm_thread = thread; /* set initial volume in mixer struct */ av7110->mixer.volume_left = volume; diff --git a/drivers/media/dvb/ttpci/av7110.h b/drivers/media/dvb/ttpci/av7110.h index 1d05166bd8..b98bd453ca 100644 --- a/drivers/media/dvb/ttpci/av7110.h +++ b/drivers/media/dvb/ttpci/av7110.h @@ -204,7 +204,6 @@ struct av7110 { struct task_struct *arm_thread; wait_queue_head_t arm_wait; u16 arm_loops; - int arm_rmmod; void *debi_virt; dma_addr_t debi_bus;