From: Thomas Monjalon <thomas@monjalon.net>
To: Andrew Rybchenko <arybchenko@solarflare.com>
Cc: dev@dpdk.org, Ferruh Yigit <ferruh.yigit@intel.com>, stable@dpdk.org
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v2] ethdev: avoid usage of uninit device info in bad port case
Date: Tue, 23 Jul 2019 15:14:35 +0200 [thread overview]
Message-ID: <1925153.tuYcfiiuYR@xps> (raw)
In-Reply-To: <1563883881-16258-1-git-send-email-arybchenko@solarflare.com>
23/07/2019 14:11, Andrew Rybchenko:
> rte_eth_dev_info_get() returns void and caller does know if the function
> does its job or not. Changing of the return value to int would be
> API/ABI breakage which requires deprecation process and cannot be
> backported to stable branches. For now, make sure that device info is
> initialized even in the case of invalid port ID.
>
> Fixes: a30268e9a2d0 ("ethdev: reset whole dev info structure before filling")
> Cc: stable@dpdk.org
>
> Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
> ---
> --- a/lib/librte_ethdev/rte_ethdev.c
> +++ b/lib/librte_ethdev/rte_ethdev.c
> + /*
> + * Init dev_info before port_id check since caller does not have
> + * return status and does not know if get is successful or not.
> + */
> + memset(dev_info, 0, sizeof(struct rte_eth_dev_info));
If someone was using a canary to detect failure, it will be resetted.
Why is it urgent to have this workaround?
Can we wait one more release for the definitive fix with error code?
> +
> RTE_ETH_VALID_PORTID_OR_RET(port_id);
> dev = &rte_eth_devices[port_id];
>
> - memset(dev_info, 0, sizeof(struct rte_eth_dev_info));
> dev_info->rx_desc_lim = lim;
> dev_info->tx_desc_lim = lim;
> dev_info->device = dev->device;
next prev parent reply other threads:[~2019-07-23 13:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-23 9:13 [dpdk-stable] [PATCH] " Andrew Rybchenko
2019-07-23 10:40 ` Ferruh Yigit
2019-07-23 12:16 ` Andrew Rybchenko
2019-07-23 12:50 ` Thomas Monjalon
2019-07-23 12:11 ` [dpdk-stable] [PATCH v2] " Andrew Rybchenko
2019-07-23 13:14 ` Thomas Monjalon [this message]
2019-07-23 13:34 ` [dpdk-stable] [dpdk-dev] " Andrew Rybchenko
2019-07-23 13:39 ` Thomas Monjalon
2019-07-23 18:45 ` Thomas Monjalon
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