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sfc: lock TX queues when calling netif_device_detach() 

The assertion of netif_device_present() at the top of
efx_hard_start_xmit() may fail if we don't do this.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Daniel Pieczko 2012-10-17 13:21:23 +01:00 committed by Ben Hutchings
parent 525d9e8240
commit c2f3b8e3a4
3 changed files with 16 additions and 3 deletions
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4
drivers/net/ethernet/sfc/efx.c
View File

@ -2279,7 +2279,7 @@ int efx_reset(struct efx_nic *efx, enum reset_type method)
netif_info(efx, drv, efx->net_dev, "resetting (%s)\n",
RESET_TYPE(method));
netif_device_detach(efx->net_dev);
efx_device_detach_sync(efx);
efx_reset_down(efx, method);
rc = efx->type->reset(efx, method);
@ -2758,7 +2758,7 @@ static int efx_pm_freeze(struct device *dev)
if (efx->state != STATE_DISABLED) {
efx->state = STATE_UNINIT;
netif_device_detach(efx->net_dev);
efx_device_detach_sync(efx);
efx_stop_all(efx);
efx_stop_interrupts(efx, false);

13
drivers/net/ethernet/sfc/efx.h
View File

@ -163,4 +163,17 @@ extern void efx_link_status_changed(struct efx_nic *efx);
extern void efx_link_set_advertising(struct efx_nic *efx, u32);
extern void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
static inline void efx_device_detach_sync(struct efx_nic *efx)
{
struct net_device *dev = efx->net_dev;
/* Lock/freeze all TX queues so that we can be sure the
* TX scheduler is stopped when we're done and before
* netif_device_present() becomes false.
*/
netif_tx_lock(dev);
netif_device_detach(dev);
netif_tx_unlock(dev);
}
#endif /* EFX_EFX_H */

2
drivers/net/ethernet/sfc/selftest.c
View File

@ -722,7 +722,7 @@ int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests,
/* Detach the device so the kernel doesn't transmit during the
* loopback test and the watchdog timeout doesn't fire.
*/
netif_device_detach(efx->net_dev);
efx_device_detach_sync(efx);
if (efx->type->test_chip) {
rc_reset = efx->type->test_chip(efx, tests);