patches for DPDK stable branches
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From: Stephen Hemminger <stephen@networkplumber.org>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: Yunjian Wang <wangyunjian@huawei.com>,
	dev@dpdk.org, ferruh.yigit@intel.com,
	andrew.rybchenko@oktetlabs.ru, jerry.lilijun@huawei.com,
	xudingke@huawei.com, stable@dpdk.org
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v3] ethdev: fix data type for port id
Date: Tue, 3 Nov 2020 15:42:19 -0800
Message-ID: <20201103154219.18566856@hermes.local> (raw)
In-Reply-To: <16713936.kKKOxVssse@thomas>

On Tue, 03 Nov 2020 19:44:21 +0100
Thomas Monjalon <thomas@monjalon.net> wrote:

> 02/11/2020 10:18, wangyunjian:
> > From: Yunjian Wang <wangyunjian@huawei.com>
> > 
> > The ethdev port id is 16 bits now. This patch fixes the data type
> > of the variable for 'pid', which changing from uint32_t to uint16_t.
> > 
> > RTE_MAX_ETHPORTS is the maximum number of ports, which customized by
> > the user. To avoid 16-bit unsigned integer overflow, the valid value
> > of RTE_MAX_ETHPORTS should be set from 0 to UINT16_MAX, and it is
> > safer to cut one more port from space.
> > 
> > So we use RTE_BUILD_BUG_ON() to ensure that RTE_MAX_ETHPORTS is less
> > to UINT16_MAX.
> > 
> > Fixes: 5b7ba31148a8 ("ethdev: add port ownership")
> > Cc: stable@dpdk.org
> > 
> > Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> > ---
> > v3:
> >    fix code styles suggested by Thomas Monjalon and Andrew Rybchenko  
> 
> I don't understand why you add the compile check in several place.
> We should just find one good place for checking RTE_MAX_ETHPORTS
> at compilation time.
> 
> I suggest rte_eth_find_next() or rte_eth_dev_allocate().
> Or maybe rte_eth_dev_is_valid_port().
> 
> Please choose only one.
> 
> 

That was my reaction, check once.
It doesn't even need to be inside a function, it can be anywhere.

  reply	other threads:[~2020-11-03 23:42 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
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 [this message]
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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