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I found a code problem in dvb-core when I was debugging with my dvb
driver. The code in dvb_dvr_release() file dmxdev.c /* TODO */ dvbdev->users--; if(dvbdev->users== -1 && dmxdev->exit==1) { fops_put(file->f_op); file->f_op = NULL; mutex_unlock(&dmxdev->mutex); "dvbdev->users== -1" should be changed to "dvbdev->users== 1", otherwise driver may block forever in dvb_dmxdev_release() where a wakeup condition is "dvbdev->users== 1". Here is the code in dvb_dmxdev_release(). if (dmxdev->dvr_dvbdev->users > 1) { wait_event(dmxdev->dvr_dvbdev->wait_queue, dmxdev->dvr_dvbdev->users==1); } I hope it is right to post this message here. --
Xiaobing Zhang |
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