diff options
| author | Ciara Loftus <ciara.loftus@intel.com> | 2020-06-09 16:19:45 +0300 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2020-06-19 08:35:34 +0300 |
| commit | b1d95cc2391ffac0c5b27256a4fb0d2cfb021a29 (patch) | |
| tree | daba3edf8a8be9f2f85ae07209ecb033e8295882 /drivers/net | |
| parent | d59e267912cd90b0adf33b4659050d831e746317 (diff) | |
| download | linux-b1d95cc2391ffac0c5b27256a4fb0d2cfb021a29.tar.xz | |
ice: protect ring accesses with WRITE_ONCE
The READ_ONCE macro is used when reading rings prior to accessing the
statistics pointer. The corresponding WRITE_ONCE usage when allocating and
freeing the rings to ensure protected access was not in place. Introduce
this.
Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_lib.c | 8 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_main.c | 2 |
2 files changed, 5 insertions, 5 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c index 28b46cc9f5cb..2e3a39cea2c0 100644 --- a/drivers/net/ethernet/intel/ice/ice_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_lib.c @@ -1194,7 +1194,7 @@ static void ice_vsi_clear_rings(struct ice_vsi *vsi) for (i = 0; i < vsi->alloc_txq; i++) { if (vsi->tx_rings[i]) { kfree_rcu(vsi->tx_rings[i], rcu); - vsi->tx_rings[i] = NULL; + WRITE_ONCE(vsi->tx_rings[i], NULL); } } } @@ -1202,7 +1202,7 @@ static void ice_vsi_clear_rings(struct ice_vsi *vsi) for (i = 0; i < vsi->alloc_rxq; i++) { if (vsi->rx_rings[i]) { kfree_rcu(vsi->rx_rings[i], rcu); - vsi->rx_rings[i] = NULL; + WRITE_ONCE(vsi->rx_rings[i], NULL); } } } @@ -1235,7 +1235,7 @@ static int ice_vsi_alloc_rings(struct ice_vsi *vsi) ring->vsi = vsi; ring->dev = dev; ring->count = vsi->num_tx_desc; - vsi->tx_rings[i] = ring; + WRITE_ONCE(vsi->tx_rings[i], ring); } /* Allocate Rx rings */ @@ -1254,7 +1254,7 @@ static int ice_vsi_alloc_rings(struct ice_vsi *vsi) ring->netdev = vsi->netdev; ring->dev = dev; ring->count = vsi->num_rx_desc; - vsi->rx_rings[i] = ring; + WRITE_ONCE(vsi->rx_rings[i], ring); } return 0; diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c index 082825e3cb39..4cbd49c87568 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -1702,7 +1702,7 @@ static int ice_xdp_alloc_setup_rings(struct ice_vsi *vsi) xdp_ring->netdev = NULL; xdp_ring->dev = dev; xdp_ring->count = vsi->num_tx_desc; - vsi->xdp_rings[i] = xdp_ring; + WRITE_ONCE(vsi->xdp_rings[i], xdp_ring); if (ice_setup_tx_ring(xdp_ring)) goto free_xdp_rings; ice_set_ring_xdp(xdp_ring); |