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sfc: hold filter_sem consistently during reset

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We should take and release the filter_sem consistently during the
reset process, in the same manner as the mac_lock and reset_lock.

For lockdep consistency we also take the filter_sem for write around
other calls to efx->type->init().

Fixes: c2bebe37c6 ("sfc: give ef10 its own rwsem in the filter table instead of filter_lock")
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bert Kenward 2018-07-11 11:45:10 +01:00 committed by David S. Miller
parent 1c56c0994a
commit 193f20033c
1 changed files with 8 additions and 9 deletions
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17
drivers/net/ethernet/sfc/efx.c
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@ -1871,12 +1871,6 @@ static void efx_remove_filters(struct efx_nic *efx)
up_write(&efx->filter_sem);
}
static void efx_restore_filters(struct efx_nic *efx)
{
down_read(&efx->filter_sem);
efx->type->filter_table_restore(efx);
up_read(&efx->filter_sem);
}
/**************************************************************************
*
@ -2688,6 +2682,7 @@ void efx_reset_down(struct efx_nic *efx, enum reset_type method)
efx_disable_interrupts(efx);
mutex_lock(&efx->mac_lock);
down_write(&efx->filter_sem);
mutex_lock(&efx->rss_lock);
if (efx->port_initialized && method != RESET_TYPE_INVISIBLE &&
method != RESET_TYPE_DATAPATH)
@ -2745,9 +2740,8 @@ int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
if (efx->type->rx_restore_rss_contexts)
efx->type->rx_restore_rss_contexts(efx);
mutex_unlock(&efx->rss_lock);
down_read(&efx->filter_sem);
efx_restore_filters(efx);
up_read(&efx->filter_sem);
efx->type->filter_table_restore(efx);
up_write(&efx->filter_sem);
if (efx->type->sriov_reset)
efx->type->sriov_reset(efx);
@ -2764,6 +2758,7 @@ fail:
efx->port_initialized = false;
mutex_unlock(&efx->rss_lock);
up_write(&efx->filter_sem);
mutex_unlock(&efx->mac_lock);
return rc;
@ -3473,7 +3468,9 @@ static int efx_pci_probe_main(struct efx_nic *efx)
efx_init_napi(efx);
down_write(&efx->filter_sem);
rc = efx->type->init(efx);
up_write(&efx->filter_sem);
if (rc) {
netif_err(efx, probe, efx->net_dev,
"failed to initialise NIC\n");
@ -3765,7 +3762,9 @@ static int efx_pm_resume(struct device *dev)
rc = efx->type->reset(efx, RESET_TYPE_ALL);
if (rc)
return rc;
down_write(&efx->filter_sem);
rc = efx->type->init(efx);
up_write(&efx->filter_sem);
if (rc)
return rc;
rc = efx_pm_thaw(dev);