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| author | Edward Cree <ecree@solarflare.com> | 2016-06-15 17:43:43 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-15 22:26:25 -0700 |
| commit | dd98708cf6a7981ad5bc23b1e10c548689482ef7 (patch) | |
| tree | fcd520dc48e6eccc891ff98703a9fd0acb8248e6 /drivers/net/ethernet/sfc/efx.h | |
| parent | ebfcd0fd90b88088e4d3841c4be9a8c5753d3993 (diff) | |
| download | lwn-dd98708cf6a7981ad5bc23b1e10c548689482ef7.tar.gz lwn-dd98708cf6a7981ad5bc23b1e10c548689482ef7.zip | |
sfc: Assert filter_sem write locked when required
Based on a patch by Andrew Rybchenko <Andrew.Rybchenko@oktetlabs.ru>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/sfc/efx.h')
| -rw-r--r-- | drivers/net/ethernet/sfc/efx.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h index 5e3f93f04e62..c3ae739e9c7a 100644 --- a/drivers/net/ethernet/sfc/efx.h +++ b/drivers/net/ethernet/sfc/efx.h @@ -274,4 +274,13 @@ static inline void efx_device_detach_sync(struct efx_nic *efx) netif_tx_unlock_bh(dev); } +static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem) +{ + if (WARN_ON(down_read_trylock(sem))) { + up_read(sem); + return false; + } + return true; +} + #endif /* EFX_EFX_H */ |