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[PATCH] IB/mthca: Don't try to set srq->last for userspace SRQs 

Userspace SRQs don't have a buffer allocated for them in the kernel, so
it doesn't make sense to set srq->last during initialization.  In fact,
this can crash trying to follow a nonexistent buffer pointer.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
hifive-unleashed-5.1
Roland Dreier 2005-09-19 09:17:56 -07:00
parent 3853194c2e
commit 6577ae51cf
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/hw/mthca/mthca_srq.c
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@ -172,6 +172,8 @@ static int mthca_alloc_srq_buf(struct mthca_dev *dev, struct mthca_pd *pd,
scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
}
srq->last = get_wqe(srq, srq->max - 1);
return 0;
}
@ -263,7 +265,6 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
srq->first_free = 0;
srq->last_free = srq->max - 1;
srq->last = get_wqe(srq, srq->max - 1);
return 0;