Skip to main content

Browse the archive

Revision d261154057c27f6c1d256b6198b0ad08733f1758 authored by Ian Abbott on 19 May 2010, 16:22:41 UTC, committed by Greg Kroah-Hartman on 04 June 2010, 20:38:53 UTC 
Staging: comedi: don't write to buffer if command finished
 
For write(), any data copied to the data buffer after the previously
set up streaming acquisition command has finished won't be used, but a
non-empty write() does not currently return 0 (or -EPIPE on error) after
the command has finished until the data buffer has been filled up.
Change this behavior to return 0 (or -EPIPE) any time after the command
has finished, without bothering to fill up the buffer with more useless
data.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1 parent ee4063f
Raw File
resources.h 
/* net/atm/resources.h - ATM-related resources */

/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */


#ifndef NET_ATM_RESOURCES_H
#define NET_ATM_RESOURCES_H

#include <linux/atmdev.h>
#include <linux/mutex.h>


extern struct list_head atm_devs;
extern struct mutex atm_dev_mutex;

int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat);


#ifdef CONFIG_PROC_FS

#include <linux/proc_fs.h>

void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos);
void atm_dev_seq_stop(struct seq_file *seq, void *v);
void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);


int atm_proc_dev_register(struct atm_dev *dev);
void atm_proc_dev_deregister(struct atm_dev *dev);

#else

static inline int atm_proc_dev_register(struct atm_dev *dev)
{
	return 0;
}

static inline void atm_proc_dev_deregister(struct atm_dev *dev)
{
	/* nothing */
}

#endif /* CONFIG_PROC_FS */

int atm_register_sysfs(struct atm_dev *adev);
void atm_unregister_sysfs(struct atm_dev *adev);
#endif
back to top