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From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Mon, 16 Sep 2019 14:31:35 +0300
Subject: [PATCH] net: ena: fix retrieval of nonadaptive interrupt moderation
intervals
Origin: https://git.kernel.org/linus/0eda847953d8dfb4b713ea62420f66157e230e13
Bug-Debian: https://bugs.debian.org/941291
Nonadaptive interrupt moderation intervals are assigned the value set
by the user in ethtool -C divided by ena_dev->intr_delay_resolution.
Therefore when the user tries to get the nonadaptive interrupt moderation
intervals with ethtool -c the code needs to multiply the saved value
by ena_dev->intr_delay_resolution.
The current code erroneously divides instead of multiplying in ethtool -c.
This patch fixes this.
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/amazon/ena/ena_ethtool.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
Index: linux/drivers/net/ethernet/amazon/ena/ena_ethtool.c
===================================================================
--- linux.orig/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ linux/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -310,14 +310,15 @@ static int ena_get_coalesce(struct net_d
/* the devie doesn't support interrupt moderation */
return -EOPNOTSUPP;
}
+
coalesce->tx_coalesce_usecs =
- ena_com_get_nonadaptive_moderation_interval_tx(ena_dev) /
+ ena_com_get_nonadaptive_moderation_interval_tx(ena_dev) *
ena_dev->intr_delay_resolution;
if (!ena_com_get_adaptive_moderation_enabled(ena_dev))
coalesce->rx_coalesce_usecs =
ena_com_get_nonadaptive_moderation_interval_rx(ena_dev)
- / ena_dev->intr_delay_resolution;
+ * ena_dev->intr_delay_resolution;
coalesce->use_adaptive_rx_coalesce =
ena_com_get_adaptive_moderation_enabled(ena_dev);
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