ice: Fix RDMA VSI removal during queue rebuild

[ Upstream commit 4b31fd4d77ffa430d0b74ba1885ea0a41594f202 ]

During qdisc create/delete, it is necessary to rebuild the queue
of VSIs. An error occurred because the VSIs created by RDMA were
still active.

Added check if RDMA is active. If yes, it disallows qdisc changes
and writes a message in the system logs.

Fixes: 348048e724a0 ("ice: Implement iidc operations")
Signed-off-by: Rafal Rogalski <rafalx.rogalski@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Signed-off-by: Kamil Maziarz <kamil.maziarz@intel.com>
Tested-by: Bharathi Sreenivas <bharathi.sreenivas@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230728171243.2446101-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 8f77088900e9475a80a569b95e3bf5ebec77d77c..a771e597795d39b334dfe1b0860afdc07f79055e 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -8777,6 +8777,7 @@ ice_setup_tc(struct net_device *netdev, enum tc_setup_type type,
 {
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_pf *pf = np->vsi->back;
+       bool locked = false;
        int err;
 
        switch (type) {
@@ -8786,10 +8787,27 @@ ice_setup_tc(struct net_device *netdev, enum tc_setup_type type,
                                                  ice_setup_tc_block_cb,
                                                  np, np, true);
        case TC_SETUP_QDISC_MQPRIO:
+               if (pf->adev) {
+                       mutex_lock(&pf->adev_mutex);
+                       device_lock(&pf->adev->dev);
+                       locked = true;
+                       if (pf->adev->dev.driver) {
+                               netdev_err(netdev, "Cannot change qdisc when RDMA is active\n");
+                               err = -EBUSY;
+                               goto adev_unlock;
+                       }
+               }
+
                /* setup traffic classifier for receive side */
                mutex_lock(&pf->tc_mutex);
                err = ice_setup_tc_mqprio_qdisc(netdev, type_data);
                mutex_unlock(&pf->tc_mutex);
+
+adev_unlock:
+               if (locked) {
+                       device_unlock(&pf->adev->dev);
+                       mutex_unlock(&pf->adev_mutex);
+               }
                return err;
        default:
                return -EOPNOTSUPP;