Commit c308dfd1 authored by Íñigo Huguet's avatar Íñigo Huguet Committed by David S. Miller

sfc: fix wrong tx channel offset with efx_separate_tx_channels

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: 3990a8ff ("sfc: allocate channels for XDP tx queues")
Reported-by: default avatarTianhao Zhao <tizhao@redhat.com>
Signed-off-by: default avatarÍñigo Huguet <ihuguet@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2e102b53
...@@ -298,6 +298,7 @@ int efx_probe_interrupts(struct efx_nic *efx) ...@@ -298,6 +298,7 @@ int efx_probe_interrupts(struct efx_nic *efx)
efx->n_channels = 1; efx->n_channels = 1;
efx->n_rx_channels = 1; efx->n_rx_channels = 1;
efx->n_tx_channels = 1; efx->n_tx_channels = 1;
efx->tx_channel_offset = 0;
efx->n_xdp_channels = 0; efx->n_xdp_channels = 0;
efx->xdp_channel_offset = efx->n_channels; efx->xdp_channel_offset = efx->n_channels;
rc = pci_enable_msi(efx->pci_dev); rc = pci_enable_msi(efx->pci_dev);
...@@ -318,6 +319,7 @@ int efx_probe_interrupts(struct efx_nic *efx) ...@@ -318,6 +319,7 @@ int efx_probe_interrupts(struct efx_nic *efx)
efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0); efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0);
efx->n_rx_channels = 1; efx->n_rx_channels = 1;
efx->n_tx_channels = 1; efx->n_tx_channels = 1;
efx->tx_channel_offset = 1;
efx->n_xdp_channels = 0; efx->n_xdp_channels = 0;
efx->xdp_channel_offset = efx->n_channels; efx->xdp_channel_offset = efx->n_channels;
efx->legacy_irq = efx->pci_dev->irq; efx->legacy_irq = efx->pci_dev->irq;
...@@ -954,10 +956,6 @@ int efx_set_channels(struct efx_nic *efx) ...@@ -954,10 +956,6 @@ int efx_set_channels(struct efx_nic *efx)
struct efx_channel *channel; struct efx_channel *channel;
int rc; int rc;
efx->tx_channel_offset =
efx_separate_tx_channels ?
efx->n_channels - efx->n_tx_channels : 0;
if (efx->xdp_tx_queue_count) { if (efx->xdp_tx_queue_count) {
EFX_WARN_ON_PARANOID(efx->xdp_tx_queues); EFX_WARN_ON_PARANOID(efx->xdp_tx_queues);
......
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