From: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Date: Mon, 13 Jul 2020 13:53:09 -0700
Subject: ice: fix overwriting TX/RX descriptor values when rebuilding VSI
Patch-mainline: v5.9-rc1
Git-commit: a02016de00f84a9e8a1a8ab1d8b9720c97fb3fdc
References: jsc#SLE-12878
If a user sets the value of the TX or RX descriptors to some non-default
value using 'ethtool -G' then we need to not overwrite the values when
we rebuild the VSI. The VSI rebuild could happen as a result of a user
setting the number of queues via the 'ethtool -L' command. Fix this by
checking to see if the value we have stored is non-zero and if it is
then don't change the value.
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/intel/ice/ice_lib.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -127,8 +127,14 @@ static void ice_vsi_set_num_desc(struct
case ICE_VSI_PF:
case ICE_VSI_CTRL:
case ICE_VSI_LB:
- vsi->num_rx_desc = ICE_DFLT_NUM_RX_DESC;
- vsi->num_tx_desc = ICE_DFLT_NUM_TX_DESC;
+ /* a user could change the values of num_[tr]x_desc using
+ * ethtool -G so we should keep those values instead of
+ * overwriting them with the defaults.
+ */
+ if (!vsi->num_rx_desc)
+ vsi->num_rx_desc = ICE_DFLT_NUM_RX_DESC;
+ if (!vsi->num_tx_desc)
+ vsi->num_tx_desc = ICE_DFLT_NUM_TX_DESC;
break;
default:
dev_dbg(ice_pf_to_dev(vsi->back), "Not setting number of Tx/Rx descriptors for VSI type %d\n",