The rte_kvargs_process() was used to parse KV pairs, it also supports
to parse 'only keys' (e.g. socket_id) type. And the callback function
parameter 'value' is NULL when parsed 'only keys'.

This patch fixes segment fault when parse input args with 'only keys'.

Fixes: 0a50a5aad299 ("mempool/cnxk: add device probe/remove")
Cc: sta...@dpdk.org

Signed-off-by: Chengwen Feng <fengcheng...@huawei.com>
---
 drivers/mempool/cnxk/cnxk_mempool.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mempool/cnxk/cnxk_mempool.c 
b/drivers/mempool/cnxk/cnxk_mempool.c
index 78caf987d0..d803e5928d 100644
--- a/drivers/mempool/cnxk/cnxk_mempool.c
+++ b/drivers/mempool/cnxk/cnxk_mempool.c
@@ -36,6 +36,9 @@ parse_max_pools_handler(const char *key, const char *value, 
void *extra_args)
        RTE_SET_USED(key);
        uint32_t val;
 
+       if (value == NULL)
+               return -EINVAL;
+
        val = rte_align32pow2(atoi(value));
        if (val < npa_aura_size_to_u32(NPA_AURA_SZ_128))
                val = 128;
-- 
2.17.1

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