From: Mitch Williams Date: Tue, 7 Apr 2015 18:32:55 +0000 (-0700) Subject: i40e: stop VF rings X-Git-Tag: v5.15~15945^2~24^2~13 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=444346385249603f8970314dcdb058d84a2530a4;p=platform%2Fkernel%2Flinux-starfive.git i40e: stop VF rings Explicitly stop the rings belonging to each VF when disabling SR-IOV. Even though the VFs were gone, and the associated VSIs were removed, the rings were not stopped, and in some circumstances the hardware would continue to access the memory formerly used by the rings, causing memory corruption or DMAR errors, both of which would lead to general malaise of the kernel. To relieve this condition, explicitly stop all the rings associated with each VF before releasing its resources. Signed-off-by: Mitch Williams Tested-by: Jim Young Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index 4d69e1f..9b3fc83 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -733,6 +733,11 @@ void i40e_free_vfs(struct i40e_pf *pf) while (test_and_set_bit(__I40E_VF_DISABLE, &pf->state)) usleep_range(1000, 2000); + for (i = 0; i < pf->num_alloc_vfs; i++) + if (test_bit(I40E_VF_STAT_INIT, &pf->vf[i].vf_states)) + i40e_vsi_control_rings(pf->vsi[pf->vf[i].lan_vsi_idx], + false); + /* Disable IOV before freeing resources. This lets any VF drivers * running in the host get themselves cleaned up before we yank * the carpet out from underneath their feet.