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[SCSI] scsi_dh: Change the scsidh_activate interface to be asynchronous

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Make scsi_dh_activate() function asynchronous, by taking in two additional
parameters, one is the callback function and the other is the data to call
the callback function with.

Signed-off-by: Chandra Seetharaman <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Chandra Seetharaman 2009-10-21 09:22:46 -07:00 • committed by James Bottomley
commit 3ae31f6a7b
8 changed files with 42 additions and 20 deletions
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3
include/scsi/scsi_device.h
View file

@ -177,6 +177,7 @@ struct scsi_dh_devlist {
char *model;
};
typedef void (*activate_complete)(void *, int);
struct scsi_device_handler {
/* Used by the infrastructure */
struct list_head list; /* list of scsi_device_handlers */
@ -188,7 +189,7 @@ struct scsi_device_handler {
int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *);
int (*attach)(struct scsi_device *);
void (*detach)(struct scsi_device *);
int (*activate)(struct scsi_device *);
int (*activate)(struct scsi_device *, activate_complete, void *);
int (*prep_fn)(struct scsi_device *, struct request *);
int (*set_params)(struct scsi_device *, const char *);
};

6
include/scsi/scsi_dh.h
View file

@ -56,14 +56,16 @@ enum {
SCSI_DH_DRIVER_MAX,
};
#if defined(CONFIG_SCSI_DH) || defined(CONFIG_SCSI_DH_MODULE)
extern int scsi_dh_activate(struct request_queue *);
extern int scsi_dh_activate(struct request_queue *, activate_complete, void *);
extern int scsi_dh_handler_exist(const char *);
extern int scsi_dh_attach(struct request_queue *, const char *);
extern void scsi_dh_detach(struct request_queue *);
extern int scsi_dh_set_params(struct request_queue *, const char *);
#else
static inline int scsi_dh_activate(struct request_queue *req)
static inline int scsi_dh_activate(struct request_queue *req,
activate_complete fn, void *data)
{
fn(data, 0);
return 0;
}
static inline int scsi_dh_handler_exist(const char *name)