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nfp: move link state interrupt request/free calls

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We need to be able to disable the link state interrupt when
the device is brought down.  We used to just free the IRQ
at the beginning of .ndo_stop().  As we now move towards
more ordered .ndo_open()/.ndo_stop() paths LSC allocation
should be placed in the "allocate resource" section.

Since the IRQ can't be freed early in .ndo_stop(), it is
disabled instead.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2016-04-07 19:39:35 +01:00 committed by David S. Miller
parent ff1b68ab2d
commit 0ba40af963
1 changed files with 12 additions and 11 deletions
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23
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
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@ -1729,10 +1729,16 @@ static int nfp_net_netdev_open(struct net_device *netdev)
NFP_NET_IRQ_EXN_IDX, nn->exn_handler);
if (err)
return err;
err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc",
nn->lsc_name, sizeof(nn->lsc_name),
NFP_NET_IRQ_LSC_IDX, nn->lsc_handler);
if (err)
goto err_free_exn;
disable_irq(nn->irq_entries[NFP_NET_CFG_LSC].vector);
err = nfp_net_alloc_rings(nn);
if (err)
goto err_free_exn;
goto err_free_lsc;
err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings);
if (err)
@ -1812,19 +1818,11 @@ static int nfp_net_netdev_open(struct net_device *netdev)
netif_tx_wake_all_queues(netdev);
err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc",
nn->lsc_name, sizeof(nn->lsc_name),
NFP_NET_IRQ_LSC_IDX, nn->lsc_handler);
if (err)
goto err_stop_tx;
enable_irq(nn->irq_entries[NFP_NET_CFG_LSC].vector);
nfp_net_read_link_status(nn);
return 0;
err_stop_tx:
netif_tx_disable(netdev);
for (r = 0; r < nn->num_r_vecs; r++)
nfp_net_tx_flush(nn->r_vecs[r].tx_ring);
err_disable_napi:
while (r--) {
napi_disable(&nn->r_vecs[r].napi);
@ -1834,6 +1832,8 @@ err_clear_config:
nfp_net_clear_config_and_disable(nn);
err_free_rings:
nfp_net_free_rings(nn);
err_free_lsc:
nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
err_free_exn:
nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
return err;
@ -1855,7 +1855,7 @@ static int nfp_net_netdev_close(struct net_device *netdev)
/* Step 1: Disable RX and TX rings from the Linux kernel perspective
*/
nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
disable_irq(nn->irq_entries[NFP_NET_CFG_LSC].vector);
netif_carrier_off(netdev);
nn->link_up = false;
@ -1876,6 +1876,7 @@ static int nfp_net_netdev_close(struct net_device *netdev)
}
nfp_net_free_rings(nn);
nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
nn_dbg(nn, "%s down", netdev->name);