i40e: use minimal Rx and Tx ring buffers for kdump

Use the minimum of the number of descriptors thus we will allocate the
minimal ring buffers for kdump.

Signed-off-by: Coiby Xu <coxu@redhat.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index b51b8e25501dc9e9f02827fc0ac5acbaf585f015..2d3dbb3c0e1427d729307561687b77d8b03109e4 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11040,6 +11040,11 @@ static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
                return -ENODATA;
        }
 
+       if (is_kdump_kernel()) {
+               vsi->num_tx_desc = I40E_MIN_NUM_DESCRIPTORS;
+               vsi->num_rx_desc = I40E_MIN_NUM_DESCRIPTORS;
+       }
+
        return 0;
 }