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cxgbe(4): The wraparound logic in start_wrq_wr() should not get involved

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in work requests that end at the end of the descriptor ring, even though
the pidx wraps around to 0.

MFC after:	3 days
This commit is contained in:
Navdeep Parhar 2017-01-09 22:18:08 +00:00
parent 129adb62dc
commit f50c49cca7
1 changed files with 1 additions and 1 deletions
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2
sys/dev/cxgbe/t4_sge.c
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@ -2298,7 +2298,7 @@ start_wrq_wr(struct sge_wrq *wrq, int len16, struct wrq_cookie *cookie)
w = &eq->desc[eq->pidx];
IDXINCR(eq->pidx, ndesc, eq->sidx);
if (__predict_false(eq->pidx < ndesc - 1)) {
if (__predict_false(cookie->pidx + ndesc > eq->sidx)) {
w = &wrq->ss[0];
wrq->ss_pidx = cookie->pidx;
wrq->ss_len = len16 * 16;