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caif: Move refcount from service layer to sock and dev.

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Instead of having reference counts in caif service layers,
we hook into existing refcount handling in socket layer and netdevice.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
sjur.brandeland@stericsson.com
2011-05-13 02:44:03 +00:00
committed by David S. Miller
parent cb3cb423a0
commit 43e3692101
3 changed files with 47 additions and 21 deletions
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29
include/net/caif/cfsrvl.h
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@@ -10,6 +10,7 @@
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/kref.h>
#include <linux/rculist.h>
struct cfsrvl {
struct cflayer layer;
@@ -17,9 +18,11 @@ struct cfsrvl {
bool phy_flow_on;
bool modem_flow_on;
bool supports_flowctrl;
void (*release)(struct kref *);
void (*release)(struct cflayer *layer);
struct dev_info dev_info;
struct kref ref;
void (*hold)(struct cflayer *lyr);
void (*put)(struct cflayer *lyr);
struct rcu_head rcu;
};
struct cflayer *cfvei_create(u8 linkid, struct dev_info *dev_info);
@@ -29,6 +32,10 @@ struct cflayer *cfvidl_create(u8 linkid, struct dev_info *dev_info);
struct cflayer *cfrfml_create(u8 linkid, struct dev_info *dev_info,
int mtu_size);
struct cflayer *cfdbgl_create(u8 linkid, struct dev_info *dev_info);
void cfsrvl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
int phyid);
bool cfsrvl_phyid_match(struct cflayer *layer, int phyid);
void cfsrvl_init(struct cfsrvl *service,
@@ -40,23 +47,19 @@ u8 cfsrvl_getphyid(struct cflayer *layer);
static inline void cfsrvl_get(struct cflayer *layr)
{
struct cfsrvl *s;
if (layr == NULL)
struct cfsrvl *s = container_of(layr, struct cfsrvl, layer);
if (layr == NULL || layr->up == NULL || s->hold == NULL)
return;
s = container_of(layr, struct cfsrvl, layer);
kref_get(&s->ref);
s->hold(layr->up);
}
static inline void cfsrvl_put(struct cflayer *layr)
{
struct cfsrvl *s;
if (layr == NULL)
struct cfsrvl *s = container_of(layr, struct cfsrvl, layer);
if (layr == NULL || layr->up == NULL || s->hold == NULL)
return;
s = container_of(layr, struct cfsrvl, layer);
WARN_ON(!s->release);
if (s->release)
kref_put(&s->ref, s->release);
s->put(layr->up);
}
#endif /* CFSRVL_H_ */