diff options
Diffstat (limited to 'drivers/scsi/pm8001/pm8001_sas.c')
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_sas.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index be55859042c..34cea829177 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -77,11 +77,16 @@ inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out) { unsigned int tag; void *bitmap = pm8001_ha->tags; + unsigned long flags; + spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags); tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num); - if (tag >= pm8001_ha->tags_num) + if (tag >= pm8001_ha->tags_num) { + spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags); return -SAS_QUEUE_FULL; + } set_bit(tag, bitmap); + spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags); *tag_out = tag; return 0; } |