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authorJack Morgenstein <jackm@dev.mellanox.co.il>2006-12-25 09:24:52 +0200
committerRoland Dreier <rolandd@cisco.com>2007-01-07 20:25:24 -0800
commit98714cb161b4b1a5d0c5bd0337a8578196b73677 (patch)
tree7ea22e79dc95a7c16bcba73430939ca2b21c348b /drivers/infiniband
parent0cefcf0bbc2d252eb48bff3289fb59c3817dd405 (diff)
downloadop-kernel-dev-98714cb161b4b1a5d0c5bd0337a8578196b73677.zip
op-kernel-dev-98714cb161b4b1a5d0c5bd0337a8578196b73677.tar.gz
IB/mthca: Fix PRM compliance problem in atomic-send completions
According to the Tavor and Arbel programmer's reference manuals, the number of bytes transferred is not provided in the byte_cnt field of the CQ entry for atomic operation completions. For atomic operations, the number of bytes transferred is always 8 (when the status is "success"), and this constant value should always be used by the driver in the ib_wc entry returned, rather than using the CQE. Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_cq.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c
index 283d50b..1159c8a 100644
--- a/drivers/infiniband/hw/mthca/mthca_cq.c
+++ b/drivers/infiniband/hw/mthca/mthca_cq.c
@@ -54,6 +54,10 @@ enum {
MTHCA_CQ_ENTRY_SIZE = 0x20
};
+enum {
+ MTHCA_ATOMIC_BYTE_LEN = 8
+};
+
/*
* Must be packed because start is 64 bits but only aligned to 32 bits.
*/
@@ -599,11 +603,11 @@ static inline int mthca_poll_one(struct mthca_dev *dev,
break;
case MTHCA_OPCODE_ATOMIC_CS:
entry->opcode = IB_WC_COMP_SWAP;
- entry->byte_len = be32_to_cpu(cqe->byte_cnt);
+ entry->byte_len = MTHCA_ATOMIC_BYTE_LEN;
break;
case MTHCA_OPCODE_ATOMIC_FA:
entry->opcode = IB_WC_FETCH_ADD;
- entry->byte_len = be32_to_cpu(cqe->byte_cnt);
+ entry->byte_len = MTHCA_ATOMIC_BYTE_LEN;
break;
case MTHCA_OPCODE_BIND_MW:
entry->opcode = IB_WC_BIND_MW;
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