net/e1000: do not error out if Rx drop enable is set

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>
Acked-by: Wei Zhao <wei.zhao1@intel.com>

diff --git a/drivers/net/e1000/em_rxtx.c b/drivers/net/e1000/em_rxtx.c
index 087e683..a9cd765 100644 (file)
--- a/drivers/net/e1000/em_rxtx.c
+++ b/drivers/net/e1000/em_rxtx.c
@@ -1417,12 +1417,13 @@ 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. */