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[v5,2/3] net/iavf: enable PCI bus master after reset

Message ID 20210506034957.46458-3-haiyue.wang@intel.com (mailing list archive)
State Superseded, archived
Delegated to: David Marchand
Headers show
Series fix PF reset causes VF memory request failure | expand


Context Check Description
ci/checkpatch warning coding style issues

Commit Message

Wang, Haiyue May 6, 2021, 3:49 a.m. UTC
The VF reset can be triggerred by the PF reset event, in this case, the
PCI bus master will be cleared, then the VF is not allowed to issue any
Memory or I/O Requests.

So after the reset event is detected, always enable the PCI bus master.
And if failed, the device or system may be in an invalid state, so keep
the VF reset state to mark it as I/O error.

Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
 drivers/net/iavf/iavf_ethdev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index c06873d26..0084a083b 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -2356,7 +2356,8 @@  iavf_dev_close(struct rte_eth_dev *dev)
 	vf->aq_resp = NULL;
-	vf->vf_reset = false;
+	if (vf->vf_reset && !rte_pci_set_bus_master(pci_dev, true))
+		vf->vf_reset = false;
 	return ret;