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From: Hemant Agrawal <hemant.agrawal@nxp.com>
To: dev@dpdk.org, matan@mellanox.com
Cc: stable@dpdk.org, Olivier Matz <olivier.matz@6wind.com>
Subject: [dpdk-dev] [PATCH BUG 335 3/3] net/virtio: fix compilation error with 0 headroom
Date: Thu, 25 Jul 2019 16:36:45 +0530	[thread overview]
Message-ID: <20190725110645.8817-3-hemant.agrawal@nxp.com> (raw)
In-Reply-To: <20190725110645.8817-1-hemant.agrawal@nxp.com>

When using RTE_PKTMBUF_HEADROOM as 0, virito ethdev driver throws
compilation error
virtio_ethdev.c:1851:2: note: in expansion of macro ‘RTE_BUILD_BUG_ON’
RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM
	< sizeof(struct virtio_net_hdr_mrg_rxbuf));

This patch change it into run-time check.
Reported as: https://bugs.dpdk.org/show_bug.cgi?id=335

Fixes: 198ab33677c9 ("net/virtio: move device initialization in a function")
Cc: stable@dpdk.org
Cc: Olivier Matz <olivier.matz@6wind.com>

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
---
 drivers/net/virtio/virtio_ethdev.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 62c827443..3e2e8bd2a 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1848,7 +1848,14 @@ eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
 	struct virtio_hw *hw = eth_dev->data->dev_private;
 	int ret;
 
-	RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
+	if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
+		PMD_INIT_LOG(ERR,
+			"Not sufficient headroom required = %d, avail = %d",
+			(int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
+			RTE_PKTMBUF_HEADROOM);
+
+		return -1;
+	}
 
 	eth_dev->dev_ops = &virtio_eth_dev_ops;
 
-- 
2.17.1


  parent reply	other threads:[~2019-07-25 11:08 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-25 11:06 [dpdk-dev] [PATCH BUG 335 1/3] net/dpaa: " Hemant Agrawal
2019-07-25 11:06 ` [dpdk-dev] [PATCH BUG 335 2/3] bus/fslmc: " Hemant Agrawal
2019-07-25 11:06 ` Hemant Agrawal [this message]
2019-07-26 12:25   ` [dpdk-dev] [PATCH BUG 335 3/3] net/virtio: " Olivier Matz
2019-07-30 13:35     ` Maxime Coquelin
2019-08-01  8:09       ` Hemant Agrawal
2019-08-05 13:07         ` Maxime Coquelin
2019-08-05 17:26           ` Thomas Monjalon

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