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crypto: hisilicon/qm - fix VF not available after PF FLR

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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 <tanshukun1@huawei.com>
Signed-off-by: Yang Shen <shenyang39@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Shukun Tan 2020-08-15 17:56:14 +08:00 committed by Herbert Xu
parent e88dd6e1d8
commit 8d8f8d494d
1 changed files with 6 additions and 0 deletions
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6
drivers/crypto/hisilicon/qm.c
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@ -3318,6 +3318,9 @@ 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;
@ -3481,6 +3484,9 @@ 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;