[dpdk-dev] [PATCH v3] ethdev: report error on name truncation

[Nithin Kumar Dabilpuram]

Currently this api doesn't report error if name is
truncated and so user is not sure about uniqueness
of name. This change reports error to help user.

Signed-off-by: Nithin Dabilpuram <ndabilpu...@marvell.com>
---
v3:
Change log message
v2:
Fix issue caused by rebase and also fix log message

 lib/librte_ethdev/rte_ethdev.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 9d5107d..474f305 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -3588,9 +3588,16 @@ rte_eth_dma_zone_reserve(const struct rte_eth_dev *dev, 
const char *ring_name,
 {
        char z_name[RTE_MEMZONE_NAMESIZE];
        const struct rte_memzone *mz;
+       int rc;
 
-       snprintf(z_name, sizeof(z_name), "eth_p%d_q%d_%s",
-                dev->data->port_id, queue_id, ring_name);
+       rc = snprintf(z_name, sizeof(z_name), "eth_p%d_q%d_%s",
+                     dev->data->port_id, queue_id, ring_name);
+
+       if (rc >= RTE_MEMZONE_NAMESIZE) {
+               RTE_ETHDEV_LOG(ERR, "ring name too long\n");
+               rte_errno = ENAMETOOLONG;
+               return NULL;
+       }
 
        mz = rte_memzone_lookup(z_name);
        if (mz)
-- 
2.8.4