[PATCH 14/34] qla2xxx: Avoid that qla2x00_mem_free() crashes if called twice

[Bart Van Assche]

Clear each pointer after having freed memory such that it becomes safe
to call qla2x00_mem_free() twice.

Cc: Himanshu Madhani <hmadh...@marvell.com>
Cc: Giridhar Malavali <gmalav...@marvell.com>
Signed-off-by: Bart Van Assche <bvanass...@acm.org>
---
 drivers/scsi/qla2xxx/qla_os.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index b90eed1c989e..6d5dfe12760e 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -4715,6 +4715,8 @@ qla2x00_mem_free(struct qla_hw_data *ha)
        if (ha->flt)
                dma_free_coherent(&ha->pdev->dev, SFP_DEV_SIZE,
                    ha->flt, ha->flt_dma);
+       ha->flt = NULL;
+       ha->flt_dma = 0;
 
        if (ha->ms_iocb)
                dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
@@ -4790,6 +4792,7 @@ qla2x00_mem_free(struct qla_hw_data *ha)
 
        if (ha->dif_bundl_pool)
                dma_pool_destroy(ha->dif_bundl_pool);
+       ha->dif_bundl_pool = NULL;
 
        qlt_mem_free(ha);
 
-- 
2.21.0.196.g041f5ea1cf98