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[SCSI] libsas: convert ha->state to flags 

In preparation for adding new states (SAS_HA_DRAINING, SAS_HA_FROZEN),
convert ha->state into a set of flags.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams 2011-12-19 17:02:25 -08:00 committed by James Bottomley
parent b15ebe0b5d
commit f8daa6e6d8
3 changed files with 4 additions and 5 deletions
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4
drivers/scsi/libsas/sas_init.c
View File

@ -112,7 +112,7 @@ int sas_register_ha(struct sas_ha_struct *sas_ha)
else if (sas_ha->lldd_queue_size == -1)
sas_ha->lldd_queue_size = 128; /* Sanity */
sas_ha->state = SAS_HA_REGISTERED;
set_bit(SAS_HA_REGISTERED, &sas_ha->state);
spin_lock_init(&sas_ha->state_lock);
error = sas_register_phys(sas_ha);
@ -160,7 +160,7 @@ int sas_unregister_ha(struct sas_ha_struct *sas_ha)
/* Set the state to unregistered to avoid further
* events to be queued */
spin_lock_irqsave(&sas_ha->state_lock, flags);
sas_ha->state = SAS_HA_UNREGISTERED;
clear_bit(SAS_HA_REGISTERED, &sas_ha->state);
spin_unlock_irqrestore(&sas_ha->state_lock, flags);
scsi_flush_work(sas_ha->core.shost);

2
drivers/scsi/libsas/sas_internal.h
View File

@ -100,7 +100,7 @@ static inline void sas_queue_event(int event, unsigned long *pending,
unsigned long flags;
spin_lock_irqsave(&sas_ha->state_lock, flags);
if (sas_ha->state != SAS_HA_UNREGISTERED)
if (test_bit(SAS_HA_REGISTERED, &sas_ha->state))
scsi_queue_work(sas_ha->core.shost, work);
spin_unlock_irqrestore(&sas_ha->state_lock, flags);
}

3
include/scsi/libsas.h
View File

@ -330,7 +330,6 @@ struct sas_ha_event {
enum sas_ha_state {
SAS_HA_REGISTERED,
SAS_HA_UNREGISTERED
};
struct sas_ha_struct {
@ -338,7 +337,7 @@ struct sas_ha_struct {
struct sas_ha_event ha_events[HA_NUM_EVENTS];
unsigned long pending;
enum sas_ha_state state;
unsigned long state;
spinlock_t state_lock;
struct scsi_core core;