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

Browse source 
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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
[email protected] 2011-05-13 02:44:03 +00:00 • committed by David S. Miller
commit 43e3692101
3 changed files with 47 additions and 21 deletions
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29
include/net/caif/cfsrvl.h
View file

@ -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_ */