6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Suman Ghosh <sumang@xxxxxxxxxxx>
[ Upstream commit 8c97ab5448f2096daba11edf8d18a44e1eb6f31d ]
During PFC configuration failure the code was not handling a graceful
exit. This patch fixes the same and add proper code for a graceful exit.
Fixes: 99c969a83d82 ("octeontx2-pf: Add egress PFC support")
Signed-off-by: Suman Ghosh <sumang@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
.../ethernet/marvell/octeontx2/nic/otx2_dcbnl.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_dcbnl.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_dcbnl.c
index bfddbff7bcdfb..28fb643d2917f 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_dcbnl.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_dcbnl.c
@@ -399,9 +399,10 @@ static int otx2_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
static int otx2_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
{
struct otx2_nic *pfvf = netdev_priv(dev);
+ u8 old_pfc_en;
int err;
- /* Save PFC configuration to interface */
+ old_pfc_en = pfvf->pfc_en;
pfvf->pfc_en = pfc->pfc_en;
if (pfvf->hw.tx_queues >= NIX_PF_PFC_PRIO_MAX)
@@ -411,13 +412,17 @@ static int otx2_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
* supported by the tx queue configuration
*/
err = otx2_check_pfc_config(pfvf);
- if (err)
+ if (err) {
+ pfvf->pfc_en = old_pfc_en;
return err;
+ }
process_pfc:
err = otx2_config_priority_flow_ctrl(pfvf);
- if (err)
+ if (err) {
+ pfvf->pfc_en = old_pfc_en;
return err;
+ }
/* Request Per channel Bpids */
if (pfc->pfc_en)
@@ -425,6 +430,12 @@ static int otx2_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
err = otx2_pfc_txschq_update(pfvf);
if (err) {
+ if (pfc->pfc_en)
+ otx2_nix_config_bp(pfvf, false);
+
+ otx2_pfc_txschq_stop(pfvf);
+ pfvf->pfc_en = old_pfc_en;
+ otx2_config_priority_flow_ctrl(pfvf);
dev_err(pfvf->dev, "%s failed to update TX schedulers\n", __func__);
return err;
}
--
2.43.0
