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fix a possible dead lock in the fonera-mp3 driver, that can happen, when the buffer runs dry

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SVN-Revision: 8753
This commit is contained in:
John Crispin 2007-09-11 16:53:53 +00:00
parent 2ef23a0fd9
commit 6ce13a764f
1 changed files with 5 additions and 2 deletions
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7
package/fonera-mp3-drv/src/mp3_drv.c
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@ -101,11 +101,12 @@ static DECLARE_COMPLETION(mp3_exit);
static int mp3_playback_thread(void *data){
int j;
unsigned long timeout;
unsigned char empty = 0;
printk("started kthread\n");
daemonize("kmp3");
while(mp3_buffering_status != MP3_PLAY_FINISHED){
if((mp3_buffering_status == MP3_PLAYING) || (mp3_buffering_status == MP3_BUFFER_FINISHED)){
while(VS1011_NEEDS_DATA){
while((VS1011_NEEDS_DATA) && (!empty)){
if(mp3_buffer_offset_read == MP3_BUFFER_SIZE){
mp3_buffer_offset_read = 0;
}
@ -115,6 +116,7 @@ static int mp3_playback_thread(void *data){
printk("mp3_drv.ko : finished playing\n");
mp3_buffering_status = MP3_PLAY_FINISHED;
} else {
empty = 1;
printk("mp3_drv.ko : buffer empty ?\n");
if(mp3_buffering_status != MP3_PLAY_FINISHED){
}
@ -128,8 +130,9 @@ static int mp3_playback_thread(void *data){
}
}
}
empty = 0;
timeout = 1;
timeout = wait_event_interruptible_timeout(wq, (timeout==0), timeout);
timeout = wait_event_interruptible_timeout(wq, (timeout==0), timeout);
}
complete_and_exit(&mp3_exit, 0);
}