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Revision b4cd08aa1f53c831e67dc5c6bc9f9acff27abcba authored by Wolfram Sang on 16 December 2015, 19:05:18 UTC, committed by Wolfram Sang on 19 December 2015, 11:00:37 UTC 
i2c: rcar: disable runtime PM correctly in slave mode
 
When we also are I2C slave, we need to disable runtime PM because the
address detection mechanism needs to be active all the time. However, we
can reenable runtime PM once the slave instance was unregistered. So,
use pm_runtime_get_sync/put to achieve this, since it has proper
refcounting. pm_runtime_allow/forbid is like a global knob controllable
from userspace which is unsuitable here.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
1 parent e79e72c
Raw File
atmclip.h 
/* net/atm/atmarp.h - RFC1577 ATM ARP */
 
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
 
 
#ifndef _ATMCLIP_H
#define _ATMCLIP_H

#include <linux/netdevice.h>
#include <linux/atm.h>
#include <linux/atmdev.h>
#include <linux/atmarp.h>
#include <linux/spinlock.h>
#include <net/neighbour.h>


#define CLIP_VCC(vcc) ((struct clip_vcc *) ((vcc)->user_back))

struct sk_buff;

struct clip_vcc {
	struct atm_vcc	*vcc;		/* VCC descriptor */
	struct atmarp_entry *entry;	/* ATMARP table entry, NULL if IP addr.
					   isn't known yet */
	int		xoff;		/* 1 if send buffer is full */
	unsigned char	encap;		/* 0: NULL, 1: LLC/SNAP */
	unsigned long	last_use;	/* last send or receive operation */
	unsigned long	idle_timeout;	/* keep open idle for so many jiffies*/
	void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
					/* keep old push fn for chaining */
	void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb);
					/* keep old pop fn for chaining */
	struct clip_vcc	*next;		/* next VCC */
};


struct atmarp_entry {
	struct clip_vcc	*vccs;		/* active VCCs; NULL if resolution is
					   pending */
	unsigned long	expires;	/* entry expiration time */
	struct neighbour *neigh;	/* neighbour back-pointer */
};

#define PRIV(dev) ((struct clip_priv *) netdev_priv(dev))

struct clip_priv {
	int number;			/* for convenience ... */
	spinlock_t xoff_lock;		/* ensures that pop is atomic (SMP) */
	struct net_device *next;	/* next CLIP interface */
};

#endif
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