From: Íñigo Huguet ihuguet@redhat.com
[ Upstream commit c308dfd1b43ef0d4c3e57b741bb3462eb7a7f4a2 ]
tx_channel_offset is calculated in efx_allocate_msix_channels, but it is also calculated again in efx_set_channels because it was originally done there, and when efx_allocate_msix_channels was introduced it was forgotten to be removed from efx_set_channels.
Moreover, the old calculation is wrong when using efx_separate_tx_channels because now we can have XDP channels after the TX channels, so n_channels - n_tx_channels doesn't point to the first TX channel.
Remove the old calculation from efx_set_channels, and add the initialization of this variable if MSI or legacy interrupts are used, next to the initialization of the rest of the related variables, where it was missing.
Fixes: 3990a8fffbda ("sfc: allocate channels for XDP tx queues") Reported-by: Tianhao Zhao tizhao@redhat.com Signed-off-by: Íñigo Huguet ihuguet@redhat.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/sfc/efx_channels.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/sfc/efx_channels.c b/drivers/net/ethernet/sfc/efx_channels.c index eec0db76d888..8ab9358a1c3d 100644 --- a/drivers/net/ethernet/sfc/efx_channels.c +++ b/drivers/net/ethernet/sfc/efx_channels.c @@ -309,6 +309,7 @@ int efx_probe_interrupts(struct efx_nic *efx) efx->n_channels = 1; efx->n_rx_channels = 1; efx->n_tx_channels = 1; + efx->tx_channel_offset = 0; efx->n_xdp_channels = 0; efx->xdp_channel_offset = efx->n_channels; rc = pci_enable_msi(efx->pci_dev); @@ -329,6 +330,7 @@ int efx_probe_interrupts(struct efx_nic *efx) efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0); efx->n_rx_channels = 1; efx->n_tx_channels = 1; + efx->tx_channel_offset = 1; efx->n_xdp_channels = 0; efx->xdp_channel_offset = efx->n_channels; efx->legacy_irq = efx->pci_dev->irq; @@ -957,10 +959,6 @@ int efx_set_channels(struct efx_nic *efx) struct efx_channel *channel; int rc;
- efx->tx_channel_offset = - efx_separate_tx_channels ? - efx->n_channels - efx->n_tx_channels : 0; - if (efx->xdp_tx_queue_count) { EFX_WARN_ON_PARANOID(efx->xdp_tx_queues);