In lpfc_release_io_buf, an lpfc_io_buf is returned to the
'available' pool before any associated sgl or cmd and rsp
buffers are returned via their respective 'put' routines.
If xri rebalancing occurs and an lpfc_io_buf structure is
reused quickly, there may be a race condition between release
of old and association of new resources.
Re-ordered lpfc_release_io_buf to release sgl and cmd/rsp
buffer lists before releasing the lpfc_io_buf structure for re-use.
Fixes: d79c9e9d4b3d ("scsi: lpfc: Support dynamic unbounded SGL lists on G7
hardware.")
Signed-off-by: Dick Kennedy <[email protected]>
Signed-off-by: James Smart <[email protected]>
---
drivers/scsi/lpfc/lpfc_sli.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 6d89dd3dd532..09e275e3bcd8 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -20138,6 +20138,13 @@ void lpfc_release_io_buf(struct lpfc_hba *phba, struct
lpfc_io_buf *lpfc_ncmd,
lpfc_ncmd->cur_iocbq.wqe_cmpl = NULL;
lpfc_ncmd->cur_iocbq.iocb_cmpl = NULL;
+ if (phba->cfg_xpsgl && !phba->nvmet_support &&
+ !list_empty(&lpfc_ncmd->dma_sgl_xtra_list))
+ lpfc_put_sgl_per_hdwq(phba, lpfc_ncmd);
+
+ if (!list_empty(&lpfc_ncmd->dma_cmd_rsp_list))
+ lpfc_put_cmd_rsp_buf_per_hdwq(phba, lpfc_ncmd);
+
if (phba->cfg_xri_rebalancing) {
if (lpfc_ncmd->expedite) {
/* Return to expedite pool */
@@ -20202,13 +20209,6 @@ void lpfc_release_io_buf(struct lpfc_hba *phba, struct
lpfc_io_buf *lpfc_ncmd,
spin_unlock_irqrestore(&qp->io_buf_list_put_lock,
iflag);
}
-
- if (phba->cfg_xpsgl && !phba->nvmet_support &&
- !list_empty(&lpfc_ncmd->dma_sgl_xtra_list))
- lpfc_put_sgl_per_hdwq(phba, lpfc_ncmd);
-
- if (!list_empty(&lpfc_ncmd->dma_cmd_rsp_list))
- lpfc_put_cmd_rsp_buf_per_hdwq(phba, lpfc_ncmd);
}
/**
--
2.13.7
