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From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [Bug 1026] ethdev API: rte_eth_dev_adjust_nb_rx_tx_desc
Date: Mon, 06 Jun 2022 10:09:21 +0000
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X-Bugzilla-Product: DPDK
X-Bugzilla-Component: ethdev
X-Bugzilla-Version: 20.11
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X-Bugzilla-Who: giovanni.tosatti@infovista.com
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https://bugs.dpdk.org/show_bug.cgi?id=3D1026

            Bug ID: 1026
           Summary: ethdev API: rte_eth_dev_adjust_nb_rx_tx_desc
           Product: DPDK
           Version: 20.11
          Hardware: All
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: giovanni.tosatti@infovista.com
  Target Milestone: ---

We are using the "rte_eth_dev_adjust_nb_rx_tx_desc" API in order to get the
descriptors limits of a NIC. Basically, by initializing the desc parameters
with an "uint16_t" value it should returns the top limit and it is working =
fine
with some NICs (e.g. Mellanox Cx5).=20

The problem is that some NIC's (e.g. Intel XXV710) seems to not really supp=
ort
"unsigned" value by returning the lower limit instead. Differently, it works
correctly returning the top limit by using 32767 instead of 65535.

Please, could you confirm if this is a know issue ?

Thanks,
Giovanni

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