From: Michal Maloszewski michal.maloszewski@intel.com
[ Upstream commit 5fcbb711024aac6d4db385623e6f2fdf019f7782 ]
Fix the inability to bring an interface up on a setup with only MSI interrupts enabled (no MSI-X). Solution is to add a default number of QPs = 1. This is enough, since without MSI-X support driver enables only a basic feature set.
Fixes: bc6d33c8d93f ("i40e: Fix the number of queues available to be mapped for use") Signed-off-by: Dawid Lukwinski dawid.lukwinski@intel.com Signed-off-by: Michal Maloszewski michal.maloszewski@intel.com Tested-by: Dave Switzer david.switzer@intel.com Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Link: https://lore.kernel.org/r/20220722175401.112572-1-anthony.l.nguyen@intel.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/i40e/i40e_main.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index c801b128e5b2..b07d55c99317 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -1908,11 +1908,15 @@ static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi, * non-zero req_queue_pairs says that user requested a new * queue count via ethtool's set_channels, so use this * value for queues distribution across traffic classes + * We need at least one queue pair for the interface + * to be usable as we see in else statement. */ if (vsi->req_queue_pairs > 0) vsi->num_queue_pairs = vsi->req_queue_pairs; else if (pf->flags & I40E_FLAG_MSIX_ENABLED) vsi->num_queue_pairs = pf->num_lan_msix; + else + vsi->num_queue_pairs = 1; }
/* Number of queues per enabled TC */