From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Igor Ryzhov <iryzhov@nfware.com>, dev@dpdk.org
Cc: David Marchand <david.marchand@6wind.com>
Subject: Re: [dpdk-dev] rte_eth_dev_attach returns 0, although device is not attached
Date: Thu, 4 Aug 2016 12:33:40 +0100 [thread overview]
Message-ID: <57A32814.1000404@intel.com> (raw)
In-Reply-To: <E1025756-36BA-4BC3-AA5D-279AE1025530@nfware.com>
Hi Igor,
On 8/3/2016 5:58 PM, Igor Ryzhov wrote:
> Hello.
>
> Function rte_eth_dev_attach can return false positive result.
> It happens because rte_eal_pci_probe_one returns zero if no driver is found for the device:
> ret = pci_probe_all_drivers(dev);
> if (ret < 0)
> goto err_return;
> return 0;
> (pci_probe_all_drivers returns 1 in that case)
>
> For example, it can be easily reproduced by trying to attach virtio device, managed by kernel driver.
You are right, and I did able to reproduce this issue with virtio as you
suggest.
But I wonder why rte_eth_dev_get_port_by_addr() is not catching this.
Perhaps a dev->attached check needs to be added into this function.
>
> I think it should be:
> ret = pci_probe_all_drivers(dev);
> if (ret)
> goto err_return;
> return 0;
Your proposal looks good to me. Will you send a patch?
> Best regards,
> Igor
>
next prev parent reply other threads:[~2016-08-04 11:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-03 16:58 Igor Ryzhov
2016-08-04 11:33 ` Ferruh Yigit [this message]
2016-08-04 11:51 ` Igor Ryzhov
2016-08-04 13:21 ` Ferruh Yigit
2016-08-04 14:54 ` Igor Ryzhov
2016-08-04 15:47 ` Ferruh Yigit
2016-08-05 12:29 ` Bruce Richardson
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