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IB/cq: Don't process more than the given budget

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The caller might not want this overhead.

Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Sagi Grimberg 2017-03-16 18:57:00 +02:00 • committed by Doug Ledford
parent 9fcd67d177
commit fedd9e1f75
1 changed files with 7 additions and 1 deletions
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8
drivers/infiniband/core/cq.c
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@ -29,7 +29,13 @@ static int __ib_process_cq(struct ib_cq *cq, int budget)
{ {
int i, n, completed = 0; int i, n, completed = 0;
while ((n = ib_poll_cq(cq, IB_POLL_BATCH, cq->wc)) > 0) { /*
* budget might be (-1) if the caller does not
* want to bound this call, thus we need unsigned
* minimum here.
*/
while ((n = ib_poll_cq(cq, min_t(u32, IB_POLL_BATCH,
budget - completed), cq->wc)) > 0) {
for (i = 0; i < n; i++) { for (i = 0; i < n; i++) {
struct ib_wc *wc = &cq->wc[i]; struct ib_wc *wc = &cq->wc[i];