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authorMaxim Levitsky <maximlevitsky@gmail.com>2007-10-13 05:35:33 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2007-10-22 12:01:41 -0200
commitea63d0b11ebb296b3daca4fcb74931604ee3ce78 (patch)
tree7f0cddc91eabbc4b24869cfb3b5e184e80fd2275 /drivers/media/video/saa7134/saa7134-tvaudio.c
parentc458473ebf31755373ca2f8063c9ec9744205924 (diff)
V4L/DVB (6330): V4L: saa7134: Fix interaction between tvaudio thread and the freezer
make tvaudio thread freezeable, and add proper support for that Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/saa7134/saa7134-tvaudio.c')
-rw-r--r--drivers/media/video/saa7134/saa7134-tvaudio.c30
1 files changed, 23 insertions, 7 deletions
diff --git a/drivers/media/video/saa7134/saa7134-tvaudio.c b/drivers/media/video/saa7134/saa7134-tvaudio.c
index 976318d5082..f8e304c7623 100644
--- a/drivers/media/video/saa7134/saa7134-tvaudio.c
+++ b/drivers/media/video/saa7134/saa7134-tvaudio.c
@@ -27,6 +27,7 @@
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/delay.h>
+#include <linux/freezer.h>
#include <asm/div64.h>
#include "saa7134-reg.h"
@@ -502,13 +503,17 @@ static int tvaudio_thread(void *data)
unsigned int i, audio, nscan;
int max1,max2,carrier,rx,mode,lastmode,default_carrier;
- allow_signal(SIGTERM);
+
+ set_freezable();
+
for (;;) {
tvaudio_sleep(dev,-1);
- if (kthread_should_stop() || signal_pending(current))
+ if (kthread_should_stop())
goto done;
restart:
+ try_to_freeze();
+
dev->thread.scan1 = dev->thread.scan2;
dprintk("tvaudio thread scan start [%d]\n",dev->thread.scan1);
dev->tvaudio = NULL;
@@ -612,9 +617,12 @@ static int tvaudio_thread(void *data)
lastmode = 42;
for (;;) {
+
+ try_to_freeze();
+
if (tvaudio_sleep(dev,5000))
goto restart;
- if (kthread_should_stop() || signal_pending(current))
+ if (kthread_should_stop())
break;
if (UNSET == dev->thread.mode) {
rx = tvaudio_getstereo(dev,&tvaudio[i]);
@@ -630,6 +638,7 @@ static int tvaudio_thread(void *data)
}
done:
+ dev->thread.stopped = 1;
return 0;
}
@@ -777,7 +786,8 @@ static int tvaudio_thread_ddep(void *data)
struct saa7134_dev *dev = data;
u32 value, norms, clock;
- allow_signal(SIGTERM);
+
+ set_freezable();
clock = saa7134_boards[dev->board].audio_clock;
if (UNSET != audio_clock_override)
@@ -790,10 +800,13 @@ static int tvaudio_thread_ddep(void *data)
for (;;) {
tvaudio_sleep(dev,-1);
- if (kthread_should_stop() || signal_pending(current))
+ if (kthread_should_stop())
goto done;
restart:
+
+ try_to_freeze();
+
dev->thread.scan1 = dev->thread.scan2;
dprintk("tvaudio thread scan start [%d]\n",dev->thread.scan1);
@@ -870,6 +883,7 @@ static int tvaudio_thread_ddep(void *data)
}
done:
+ dev->thread.stopped = 1;
return 0;
}
@@ -997,7 +1011,7 @@ int saa7134_tvaudio_init2(struct saa7134_dev *dev)
int saa7134_tvaudio_fini(struct saa7134_dev *dev)
{
/* shutdown tvaudio thread */
- if (dev->thread.thread)
+ if (dev->thread.thread && !dev->thread.stopped)
kthread_stop(dev->thread.thread);
saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x07, 0x00); /* LINE1 */
@@ -1013,7 +1027,9 @@ int saa7134_tvaudio_do_scan(struct saa7134_dev *dev)
} else if (dev->thread.thread) {
dev->thread.mode = UNSET;
dev->thread.scan2++;
- wake_up_process(dev->thread.thread);
+
+ if (!dev->insuspend && !dev->thread.stopped)
+ wake_up_process(dev->thread.thread);
} else {
dev->automute = 0;
saa7134_tvaudio_setmute(dev);