diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2012-07-27 19:35:39 +0100 |
|---|---|---|
| committer | Ben Hutchings <bhutchings@solarflare.com> | 2012-08-24 20:10:19 +0100 |
| commit | 61da026d86517def727eb67d7cb8ee5657a12dd9 (patch) | |
| tree | 4d7785c6aa2620d0940462cebecaca7e2a417583 /drivers | |
| parent | f16aeea0e679d5fd43fc02e99569c52d77d5e5d3 (diff) | |
sfc: Hold the RTNL lock for more of the suspend/resume cycle
I don't think these PM functions can race with userland net device
operations, but it's much easier to reason about locking if state is
consistently guarded by the same lock.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/sfc/efx.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c index 9f88ad86f4e..e5f3a17349a 100644 --- a/drivers/net/ethernet/sfc/efx.c +++ b/drivers/net/ethernet/sfc/efx.c @@ -2727,6 +2727,8 @@ static int efx_pm_freeze(struct device *dev) { struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); + rtnl_lock(); + efx->state = STATE_UNINIT; netif_device_detach(efx->net_dev); @@ -2734,6 +2736,8 @@ static int efx_pm_freeze(struct device *dev) efx_stop_all(efx); efx_stop_interrupts(efx, false); + rtnl_unlock(); + return 0; } @@ -2741,6 +2745,8 @@ static int efx_pm_thaw(struct device *dev) { struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); + rtnl_lock(); + efx_start_interrupts(efx, false); mutex_lock(&efx->mac_lock); @@ -2755,6 +2761,8 @@ static int efx_pm_thaw(struct device *dev) efx->type->resume_wol(efx); + rtnl_unlock(); + /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ queue_work(reset_workqueue, &efx->reset_work); |