[PATCH] net/e1000: do not error out if rx_drop_en is set

[Luca Boccassi <bluca@debian.org>]

rx_drop_en is an optimization that does nothing on single-queue
devices like e1000. Do not force applications that do not care to
select per-devices optimizations flags by returning an error, just
log it and carry on.

Fixes: 805803445a02 ("e1000: support EM devices (also known as e1000/e1000e)")
Cc: stable@dpdk.org

Signed-off-by: Luca Boccassi <bluca@debian.org>
---
 drivers/net/e1000/em_rxtx.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/e1000/em_rxtx.c b/drivers/net/e1000/em_rxtx.c
index a6b3e92a6..81dc41efb 100644
--- a/drivers/net/e1000/em_rxtx.c
+++ b/drivers/net/e1000/em_rxtx.c
@@ -1416,12 +1416,13 @@ eth_em_rx_queue_setup(struct rte_eth_dev *dev,
 	}
 
 	/*
-	 * EM devices don't support drop_en functionality
+	 * EM devices don't support drop_en functionality.
+	 * It's an optimization that does nothing on single-queue devices,
+	 * so just log the issue and carry on.
 	 */
 	if (rx_conf->rx_drop_en) {
-		PMD_INIT_LOG(ERR, "drop_en functionality not supported by "
+		PMD_INIT_LOG(NOTICE, "drop_en functionality not supported by "
 			     "device");
-		return -EINVAL;
 	}
 
 	/* Free memory prior to re-allocation if needed. */
-- 
2.18.0