tree bd4e2cc82e85f6897c6c1fb4f09f79030eea32a9
parent e42eaefd55441c06e4f75d982cb5edf462a68572
author Vivek Behera <vivek.behera@siemens.com> 1766404667 +0100
committer Tony Nguyen <anthony.l.nguyen@intel.com> 1767822574 -0800

igb: Fix trigger of incorrect irq in igb_xsk_wakeup

The current implementation in the igb_xsk_wakeup expects the Rx and Tx queues
to share the same irq. This would lead to triggering of incorrect irq
in split irq configuration.
This patch addresses this issue which could impact environments
with 2 active cpu cores
or when the number of queues is reduced to 2 or less

cat /proc/interrupts | grep eno2
 167:          0          0          0          0 IR-PCI-MSIX-0000:08:00.0
 0-edge      eno2
 168:          0          0          0          0 IR-PCI-MSIX-0000:08:00.0
 1-edge      eno2-rx-0
 169:          0          0          0          0 IR-PCI-MSIX-0000:08:00.0
 2-edge      eno2-rx-1
 170:          0          0          0          0 IR-PCI-MSIX-0000:08:00.0
 3-edge      eno2-tx-0
 171:          0          0          0          0 IR-PCI-MSIX-0000:08:00.0
 4-edge      eno2-tx-1

Furthermore it uses the flags input argument to trigger either rx, tx or
both rx and tx irqs as specified in the ndo_xsk_wakeup api documentation

Fixes: 80f6ccf9f116 ("igb: Introduce XSK data structures and helpers")
Signed-off-by: Vivek Behera <vivek.behera@siemens.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>