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| author | Hariprasad Shenai | 2015-12-08 05:39:14 +0100 |
|---|---|---|
| committer | David S. Miller | 2015-12-09 04:43:15 +0100 |
| commit | 126fca643e3f6ee6e26533366f77acdd9e07d2ec (patch) | |
| tree | ca0b19895615bfda68d1f238efae3e240ae570c8 /drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | |
| parent | cxgb4: Use ACCES_ONCE macro to read queue's consumer index (diff) | |
| download | kernel-qcow2-linux-126fca643e3f6ee6e26533366f77acdd9e07d2ec.tar.gz kernel-qcow2-linux-126fca643e3f6ee6e26533366f77acdd9e07d2ec.tar.xz kernel-qcow2-linux-126fca643e3f6ee6e26533366f77acdd9e07d2ec.zip | |
cxgb4: prevent simultaneous execution of service_ofldq()
Change mutual exclusion mechanism to prevent multiple threads of
execution from running in service_ofldq() at the same time. The old
mechanism used an implicit guard on the down-call path and none on the
restart path and wasn't working. This checking makes the mechanism
explicit and is much easier to understand as a result.
Based on original work by Casey Leedom <leedom@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb4/cxgb4.h')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h index 55a47de544ea..d4076e8e2e0b 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h @@ -618,6 +618,7 @@ struct sge_ofld_txq { /* state for an SGE offload Tx queue */ struct adapter *adap; struct sk_buff_head sendq; /* list of backpressured packets */ struct tasklet_struct qresume_tsk; /* restarts the queue */ + bool service_ofldq_running; /* service_ofldq() is processing sendq */ u8 full; /* the Tx ring is full */ unsigned long mapping_err; /* # of I/O MMU packet mapping errors */ } ____cacheline_aligned_in_smp; |