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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 <o.endriss@gmx.de>

Signed-off-by: Herbert Poetzl <herbert@13thfloor.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Herbert Poetzl 2007-02-08 14:32:43 -03:00 committed by Mauro Carvalho Chehab
parent 2a9f8b5d25
commit 8eec14295e
3 changed files with 37 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

69
drivers/media/dvb/dvb-core/dvb_frontend.c
View File

@ -36,6 +36,7 @@
#include <linux/list.h>
#include <linux/freezer.h>
#include <linux/jiffies.h>
#include <linux/kthread.h>
#include <asm/processor.h>
#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(&current->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;
}

29
drivers/media/dvb/ttpci/av7110.c
View File

@ -51,6 +51,7 @@
#include <linux/firmware.h>
#include <linux/crc32.h>
#include <linux/i2c.h>
#include <linux/kthread.h>
#include <asm/system.h>
@ -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(&current->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;

1
drivers/media/dvb/ttpci/av7110.h
View File

@ -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;