patches for DPDK stable branches
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From: Thomas Monjalon <thomas@monjalon.net>
To: wangyunjian <wangyunjian@huawei.com>
Cc: dev@dpdk.org, ferruh.yigit@intel.com,
	andrew.rybchenko@oktetlabs.ru, jerry.lilijun@huawei.com,
	xudingke@huawei.com, Yunjian Wang <wangyunjian@huawei.com>,
	stable@dpdk.org
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v2] ethdev: fix data type for port id
Date: Tue, 27 Oct 2020 15:29:29 +0100
Message-ID: <3015812.jyVNu9Cn7i@thomas> (raw)
In-Reply-To: <1603806082-21484-1-git-send-email-wangyunjian@huawei.com>

27/10/2020 14:41, wangyunjian:
> From: Yunjian Wang <wangyunjian@huawei.com>
> 
> The ethdev port id should be 16 bits now. This patch fixes the data
> type of the variable for 'pid', changing from uint32_t to uint16_t.
> 
> We also need use RTE_BUILD_BUG_ON() to ensure that RTE_MAX_ETHPORTS
> is less or equal to UINT16_MAX.

Actually the need is to check that we have room for an increment
after RTE_MAX_ETHPORTS, meaning RTE_MAX_ETHPORTS < UINT16_MAX.

> Fixes: 5b7ba31148a8 ("ethdev: add port ownership")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> ---
> v2:
>    add RTE_BUILD_BUG_ON() check for RTE_MAX_ETHPORTS validity
> ---
>  rte_eth_dev_get_port_by_name(const char *name, uint16_t *port_id)
>  {
> -	uint32_t pid;
> +	uint16_t pid;
>  
>  	if (name == NULL) {
>  		RTE_ETHDEV_LOG(ERR, "Null pointer is specified\n");
> @@ -4292,6 +4292,8 @@ RTE_INIT(eth_dev_init_cb_lists)
>  {
>  	int i;
>  
> +	RTE_BUILD_BUG_ON(RTE_MAX_ETHPORTS > UINT16_MAX);

As explained above, should check >=

This check is global for ethdev.
Please could you move it somewhere else?




  reply	other threads:[~2020-10-27 14:29 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-26 12:24 [dpdk-stable] [dpdk-dev] [PATCH] " wangyunjian
2020-10-26 12:29 ` Andrew Rybchenko
2020-10-27 13:41 ` [dpdk-stable] [dpdk-dev] [PATCH v2] " wangyunjian
2020-10-27 14:29   ` Thomas Monjalon [this message]
2020-10-29 12:18     ` wangyunjian
2020-10-29 12:40       ` Andrew Rybchenko
2020-10-29 12:43       ` Thomas Monjalon
2020-11-02  9:18   ` [dpdk-stable] [dpdk-dev] [PATCH v3] " wangyunjian
2020-11-03 18:44     ` Thomas Monjalon
2020-11-03 23:42       ` Stephen Hemminger
2020-11-04  1:57       ` wangyunjian
2020-11-04  2:57     ` [dpdk-stable] [dpdk-dev] [PATCH v4] " wangyunjian
2020-11-04  3:26       ` Ajit Khaparde
2020-11-04 11:46         ` Ferruh Yigit
2020-11-04 13:49           ` Ferruh Yigit

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