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i40e: use minimal Tx and Rx pairs for kdump

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Set the number of the MSI-X vectors to 1. When MSI-X is enabled,
it's not allowed to use more TC queue pairs than MSI-X vectors
(pf->num_lan_msix) exist. Thus the number of Tx and Rx pairs
(vsi->num_queue_pairs) will be equal to the number of MSI-X vectors,
i.e., 1.

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>
This commit is contained in:
Coiby Xu 2021-03-04 10:55:41 +08:00 committed by Tony Nguyen
parent 6d2c322cce
commit 065aa694a7
1 changed files with 9 additions and 0 deletions
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9
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -6,6 +6,7 @@
#include <linux/pci.h>
#include <linux/bpf.h>
#include <generated/utsrelease.h>
#include <linux/crash_dump.h>
/* Local includes */
#include "i40e.h"
@ -15506,6 +15507,14 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (err)
goto err_switch_setup;
/* Reduce Tx and Rx pairs for kdump
* When MSI-X is enabled, it's not allowed to use more TC queue
* pairs than MSI-X vectors (pf->num_lan_msix) exist. Thus
* vsi->num_queue_pairs will be equal to pf->num_lan_msix, i.e., 1.
*/
if (is_kdump_kernel())
pf->num_lan_msix = 1;
pf->udp_tunnel_nic.set_port = i40e_udp_tunnel_set_port;
pf->udp_tunnel_nic.unset_port = i40e_udp_tunnel_unset_port;
pf->udp_tunnel_nic.flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP;