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sfc: protect list of RSS contexts under a mutex

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Otherwise races are possible between ethtool ops and
 efx_ef10_rx_restore_rss_contexts().
Also, don't try to perform the restore on every reset, only after an MC
 reboot, otherwise we'll leak RSS contexts on the NIC.

Fixes: 42356d9a13 ("sfc: support RSS spreading of ethtool ntuple filters")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree
2018-03-27 17:44:36 +01:00
committed by David S. Miller
parent 31b8429552
commit e0a65e3c5e
6 changed files with 89 additions and 32 deletions
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4
drivers/net/ethernet/sfc/efx.h
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@@ -187,8 +187,8 @@ static inline void efx_filter_rfs_expire(struct work_struct *data) {}
bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
/* RSS contexts */
struct efx_rss_context *efx_alloc_rss_context_entry(struct list_head *list);
struct efx_rss_context *efx_find_rss_context_entry(u32 id, struct list_head *list);
struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx);
struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id);
void efx_free_rss_context_entry(struct efx_rss_context *ctx);
static inline bool efx_rss_active(struct efx_rss_context *ctx)
{