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crypto/cnxk: fix inflight count calculation

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Inflight count calculation is updated to cover wrap around cases where
head can become smaller than tail.

Fixes: fd390896f4 ("crypto/cnxk: allow different cores in pending queue")
Cc: stable@dpdk.org

Reported-by: Kiran Kumar K <kirankumark@marvell.com>
Signed-off-by: Anoob Joseph <anoobj@marvell.com>
Acked-by: Akhil Goyal <gakhil@marvell.com>
This commit is contained in:
Anoob Joseph 2021-12-17 14:50:01 +05:30 committed by Akhil Goyal
parent 2842ba07af
commit ec6ca0536e
1 changed files with 5 additions and 1 deletions
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6
drivers/crypto/cnxk/cnxk_cryptodev_ops.h
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@ -156,7 +156,11 @@ pending_queue_retreat(uint64_t *index, const uint64_t mask, uint64_t nb_entry)
static __rte_always_inline uint64_t
pending_queue_infl_cnt(uint64_t head, uint64_t tail, const uint64_t mask)
{
return (head - tail) & mask;
/*
* Mask is nb_desc - 1. Add nb_desc to head and mask to account for
* cases when tail > head, which happens during wrap around.
*/
return ((head + mask + 1) - tail) & mask;
}
static __rte_always_inline uint64_t