diff options
Diffstat (limited to 'drivers/scsi/pm8001/pm8001_sas.c')
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_sas.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index c9fa3328f3fa..2359e827c9e6 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -65,9 +65,12 @@ static int pm8001_find_tag(struct sas_task *task, u32 *tag) */ void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag) { - void *bitmap = pm8001_ha->tags; + void *bitmap = pm8001_ha->rsvd_tags; unsigned long flags; + if (tag >= PM8001_RESERVE_SLOT) + return; + spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags); __clear_bit(tag, bitmap); spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags); @@ -80,18 +83,20 @@ void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag) */ int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out) { - void *bitmap = pm8001_ha->tags; + void *bitmap = pm8001_ha->rsvd_tags; unsigned long flags; unsigned int tag; spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags); - tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num); - if (tag >= pm8001_ha->tags_num) { + tag = find_first_zero_bit(bitmap, PM8001_RESERVE_SLOT); + if (tag >= PM8001_RESERVE_SLOT) { spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags); return -SAS_QUEUE_FULL; } __set_bit(tag, bitmap); spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags); + + /* reserved tags are in the lower region of the tagset */ *tag_out = tag; return 0; } |