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staging/rdma/hfi1: Detect SDMA transmission error early

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It is possible for an SDMA transmission error to happen
during the processing of an user SDMA transfer. In that
case it is better to detect it early and abort any further
attempts to send more packets.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mitko Haralanov 2015-12-08 17:10:12 -05:00 committed by Greg Kroah-Hartman
parent faa98b8620
commit 6a5464f224
1 changed files with 6 additions and 0 deletions
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6
drivers/staging/rdma/hfi1/user_sdma.c
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@ -774,6 +774,12 @@ static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts)
pq = req->pq;
/* If tx completion has reported an error, we are done. */
if (test_bit(SDMA_REQ_HAS_ERROR, &req->flags)) {
set_bit(SDMA_REQ_DONE_ERROR, &req->flags);
return -EFAULT;
}
/*
* Check if we might have sent the entire request already
*/