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qcacmn: correct napi bucket calculation

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NAPI bucket calculation was resulting in bucket number which was out of
bounds for the number of buckets.
Calculate bucket index correctly and check for out of bound
condition.

CRs-Fixed: 1091483
Change-Id: Ieb81b2eeec546a6128c6b878db4c65ccb8b62bda
This commit is contained in:
Mohit Khanna
2016-11-17 12:25:49 -08:00
committed by Sandeep Puligilla
parent 9ee4b9e84a
commit 200e660f21
1 changed files with 6 additions and 1 deletions
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7
hif/src/hif_napi.c
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@@ -758,7 +758,12 @@ int hif_napi_poll(struct hif_opaque_softc *hif_ctx, struct napi_struct *napi,
*/
if (rc)
normalized++;
bucket = (normalized / QCA_NAPI_DEF_SCALE);
bucket = normalized / (QCA_NAPI_BUDGET / QCA_NAPI_NUM_BUCKETS);
if (bucket >= QCA_NAPI_NUM_BUCKETS) {
bucket = QCA_NAPI_NUM_BUCKETS - 1;
HIF_ERROR("Bad bucket#(%d) > QCA_NAPI_NUM_BUCKETS(%d)",
bucket, QCA_NAPI_NUM_BUCKETS);
}
napi_info->stats[cpu].napi_budget_uses[bucket]++;
/* if ce_per engine reports 0, then poll should be terminated */