From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Haiyang Zhang <haiyangz@microsoft.com>,
Jakub Kicinski <jakub.kicinski@netronome.com>,
Sasha Levin <sashal@kernel.org>,
linux-hyperv@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 108/187] hv_netvsc: Fix tx_table init in rndis_set_subchannel()
Date: Fri, 27 Dec 2019 12:39:36 -0500 [thread overview]
Message-ID: <20191227174055.4923-108-sashal@kernel.org> (raw)
In-Reply-To: <20191227174055.4923-1-sashal@kernel.org>
From: Haiyang Zhang <haiyangz@microsoft.com>
[ Upstream commit c39ea5cba5a2e97fc01b78c85208bf31383b399c ]
Host can provide send indirection table messages anytime after RSS is
enabled by calling rndis_filter_set_rss_param(). So the host provided
table values may be overwritten by the initialization in
rndis_set_subchannel().
To prevent this problem, move the tx_table initialization before calling
rndis_filter_set_rss_param().
Fixes: a6fb6aa3cfa9 ("hv_netvsc: Set tx_table to equal weight after subchannels open")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/hyperv/rndis_filter.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index abaf8156d19d..e3d3c9097ff1 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -1165,6 +1165,9 @@ int rndis_set_subchannel(struct net_device *ndev,
wait_event(nvdev->subchan_open,
atomic_read(&nvdev->open_chn) == nvdev->num_chn);
+ for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
+ ndev_ctx->tx_table[i] = i % nvdev->num_chn;
+
/* ignore failures from setting rss parameters, still have channels */
if (dev_info)
rndis_filter_set_rss_param(rdev, dev_info->rss_key);
@@ -1174,9 +1177,6 @@ int rndis_set_subchannel(struct net_device *ndev,
netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
- for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
- ndev_ctx->tx_table[i] = i % nvdev->num_chn;
-
return 0;
}
--
2.20.1
parent reply other threads:[~2019-12-27 17:52 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20191227174055.4923-1-sashal@kernel.org>]
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