From: Shukun Tan <[email protected]>
When PF FLR, the hardware will actively trigger the VF FLR. Configuration
space of VF needs to be saved and restored to ensure that it is available
after the PF FLR.
Fixes: 7ce396fa12a9("crypto: hisilicon - add FLR support")
Signed-off-by: Shukun Tan <[email protected]>
Signed-off-by: Yang Shen <[email protected]>
Reviewed-by: Zhou Wang <[email protected]>
---
drivers/crypto/hisilicon/qm.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 427c3e0..914771f 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -3317,6 +3317,9 @@ static int qm_vf_reset_prepare(struct hisi_qm *qm,
continue;
if (pci_physfn(virtfn) == pdev) {
+ /* save VFs PCIE BAR configuration */
+ pci_save_state(virtfn);
+
ret = hisi_qm_stop(vf_qm, stop_reason);
if (ret)
goto stop_fail;
@@ -3480,6 +3483,9 @@ static int qm_vf_reset_done(struct hisi_qm *qm)
continue;
if (pci_physfn(virtfn) == pdev) {
+ /* enable VFs PCIE BAR configuration */
+ pci_restore_state(virtfn);
+
ret = qm_restart(vf_qm);
if (ret)
goto restart_fail;
--
2.7.4