diff options
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_srq.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c index 64f70aa1b3c0..292f55be8cbd 100644 --- a/drivers/infiniband/hw/mthca/mthca_srq.c +++ b/drivers/infiniband/hw/mthca/mthca_srq.c | |||
| @@ -75,15 +75,16 @@ static void *get_wqe(struct mthca_srq *srq, int n) | |||
| 75 | 75 | ||
| 76 | /* | 76 | /* |
| 77 | * Return a pointer to the location within a WQE that we're using as a | 77 | * Return a pointer to the location within a WQE that we're using as a |
| 78 | * link when the WQE is in the free list. We use an offset of 4 | 78 | * link when the WQE is in the free list. We use the imm field |
| 79 | * because in the Tavor case, posting a WQE may overwrite the first | 79 | * because in the Tavor case, posting a WQE may overwrite the next |
| 80 | * four bytes of the previous WQE. The offset avoids corrupting our | 80 | * segment of the previous WQE, but a receive WQE will never touch the |
| 81 | * free list if the WQE has already completed and been put on the free | 81 | * imm field. This avoids corrupting our free list if the previous |
| 82 | * list when we post the next WQE. | 82 | * WQE has already completed and been put on the free list when we |
| 83 | * post the next WQE. | ||
| 83 | */ | 84 | */ |
| 84 | static inline int *wqe_to_link(void *wqe) | 85 | static inline int *wqe_to_link(void *wqe) |
| 85 | { | 86 | { |
| 86 | return (int *) (wqe + 4); | 87 | return (int *) (wqe + offsetof(struct mthca_next_seg, imm)); |
| 87 | } | 88 | } |
| 88 | 89 | ||
| 89 | static void mthca_tavor_init_srq_context(struct mthca_dev *dev, | 90 | static void mthca_tavor_init_srq_context(struct mthca_dev *dev, |