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path: root/drivers/scsi/pm8001/pm8001_sas.c
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Diffstat (limited to 'drivers/scsi/pm8001/pm8001_sas.c')
-rw-r--r--drivers/scsi/pm8001/pm8001_sas.c13
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;
}