diff mbox series

net/igc: remove MTU setting limitation

Message ID 20210219085407.97265-1-dapengx.yu@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Qi Zhang
Headers show
Series net/igc: remove MTU setting limitation | expand


Context Check Description
ci/iol-testing success Testing PASS
ci/iol-abi-testing success Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/github-robot success github build: passed
ci/travis-robot fail travis build: failed
ci/intel-Testing success Testing PASS
ci/Intel-compilation success Compilation OK
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-broadcom-Performance success Performance Testing PASS
ci/checkpatch warning coding style issues

Commit Message

Yu, DapengX Feb. 19, 2021, 8:54 a.m. UTC
From: Dapeng Yu <dapengx.yu@intel.com>

Currently, if requested MTU is bigger than mbuf size and scattered
receive is not enabled, setting MTU to that value fails.

This patch allows setting this special MTU when device is stopped,
because scattered_rx will be re-configured during next port start
and driver may enable scattered receive according new MTU value.

After this patch, driver may select different receive function
automatically after MTU set, according MTU values selected.

Fixes: a5aeb2b9e225 ("net/igc: support Rx and Tx")
Cc: stable@dpdk.org

Signed-off-by: Dapeng Yu <dapengx.yu@intel.com>
 drivers/net/igc/igc_ethdev.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
diff mbox series


diff --git a/drivers/net/igc/igc_ethdev.c b/drivers/net/igc/igc_ethdev.c
index dbaa7a83e..0ea6e2a04 100644
--- a/drivers/net/igc/igc_ethdev.c
+++ b/drivers/net/igc/igc_ethdev.c
@@ -1590,12 +1590,14 @@  eth_igc_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 		return -EINVAL;
-	 * refuse mtu that requires the support of scattered packets when
-	 * this feature has not been enabled before.
+	 * If device is started, refuse mtu that requires the support of
+	 * scattered packets when this feature has not been enabled before.
-	if (!dev->data->scattered_rx &&
-	    frame_size > dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)
+	if (dev->data->dev_started && !dev->data->scattered_rx &&
+	    frame_size > dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM) {
+		PMD_INIT_LOG(ERR, "Stop port first.");
 		return -EINVAL;
+	}
 	rctl = IGC_READ_REG(hw, IGC_RCTL);