Added open/close hooks to device structure

diff --git a/comedi/comedi_fops.c b/comedi/comedi_fops.c
index 2e23fe79d9fe591e6a967565c984bb38ec7289ea..66e1a342b78df97ee8e3e7cd0fd07984b44ced8f 100644 (file)
--- a/comedi/comedi_fops.c
+++ b/comedi/comedi_fops.c
@@ -1618,6 +1618,11 @@ ok:
        if(dev->attached && dev->driver->module){
                __MOD_INC_USE_COUNT(dev->driver->module);
        }
+
+       if(dev->attached && dev->use_count==0 && dev->open){
+               dev->open(dev);
+       }
+
        dev->use_count++;
 
        return 0;
@@ -1640,6 +1645,10 @@ static int comedi_close_v22(struct inode *inode,struct file *file)
                }
        }
 
+       if(dev->attached && dev->use_count==1 && dev->close){
+               dev->close(dev);
+       }
+
        MOD_DEC_USE_COUNT;
        if(dev->attached && dev->driver->module){
                __MOD_DEC_USE_COUNT(dev->driver->module);

diff --git a/include/linux/comedidev.h b/include/linux/comedidev.h
index c468d5d5176c691b628c7e12ea502605c04d801d..715db3271e07ce82d175d6a5b80e27f28f573dd8 100644 (file)
--- a/include/linux/comedidev.h
+++ b/include/linux/comedidev.h
@@ -206,6 +206,9 @@ struct comedi_device_struct{
        wait_queue_head_t write_wait;
 
        struct fasync_struct *async_queue;
+
+       void (*open)(comedi_device *dev);
+       void (*close)(comedi_device *dev);
 };