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{
    "id": 95848,
    "url": "http://patches.dpdk.org/api/patches/95848/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/patch/20210714103435.3388-4-mk@semihalf.com/",
    "project": {
        "id": 1,
        "url": "http://patches.dpdk.org/api/projects/1/?format=api",
        "name": "DPDK",
        "link_name": "dpdk",
        "list_id": "dev.dpdk.org",
        "list_email": "dev@dpdk.org",
        "web_url": "http://core.dpdk.org",
        "scm_url": "git://dpdk.org/dpdk",
        "webscm_url": "http://git.dpdk.org/dpdk",
        "list_archive_url": "https://inbox.dpdk.org/dev",
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        "commit_url_format": ""
    },
    "msgid": "<20210714103435.3388-4-mk@semihalf.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/20210714103435.3388-4-mk@semihalf.com",
    "date": "2021-07-14T10:34:32",
    "name": "[v2,3/6] net/ena: trigger reset when Tx prepare fails",
    "commit_ref": null,
    "pull_url": null,
    "state": "superseded",
    "archived": true,
    "hash": "5ddc3f9604eaa32a188814fce37842ee6993cdf9",
    "submitter": {
        "id": 786,
        "url": "http://patches.dpdk.org/api/people/786/?format=api",
        "name": "Michal Krawczyk",
        "email": "mk@semihalf.com"
    },
    "delegate": null,
    "mbox": "http://patches.dpdk.org/project/dpdk/patch/20210714103435.3388-4-mk@semihalf.com/mbox/",
    "series": [
        {
            "id": 17818,
            "url": "http://patches.dpdk.org/api/series/17818/?format=api",
            "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=17818",
            "date": "2021-07-14T10:34:29",
            "name": "net/ena: v2.4.0 driver update",
            "version": 2,
            "mbox": "http://patches.dpdk.org/series/17818/mbox/"
        }
    ],
    "comments": "http://patches.dpdk.org/api/patches/95848/comments/",
    "check": "warning",
    "checks": "http://patches.dpdk.org/api/patches/95848/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<dev-bounces@dpdk.org>",
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        "X-Received": "by 2002:a2e:5810:: with SMTP id m16mr8600787ljb.323.1626258897147;\n Wed, 14 Jul 2021 03:34:57 -0700 (PDT)",
        "From": "Michal Krawczyk <mk@semihalf.com>",
        "To": "dev@dpdk.org",
        "Cc": "ndagan@amazon.com, shaibran@amazon.com, upstream@semihalf.com,\n Michal Krawczyk <mk@semihalf.com>, stable@dpdk.org,\n Shay Agroskin <shayagr@amazon.com>",
        "Date": "Wed, 14 Jul 2021 12:34:32 +0200",
        "Message-Id": "<20210714103435.3388-4-mk@semihalf.com>",
        "X-Mailer": "git-send-email 2.25.1",
        "In-Reply-To": "<20210714103435.3388-1-mk@semihalf.com>",
        "References": "<20210713154118.32111-1-mk@semihalf.com>\n <20210714103435.3388-1-mk@semihalf.com>",
        "MIME-Version": "1.0",
        "Content-Transfer-Encoding": "8bit",
        "Subject": "[dpdk-dev] [PATCH v2 3/6] net/ena: trigger reset when Tx prepare\n fails",
        "X-BeenThere": "dev@dpdk.org",
        "X-Mailman-Version": "2.1.29",
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        "Errors-To": "dev-bounces@dpdk.org",
        "Sender": "\"dev\" <dev-bounces@dpdk.org>"
    },
    "content": "If the prepare function failed, then it means the descriptors are in the\ninvalid state.\n\nThis condition now triggers the reset, which should be further handled\nby the application.\n\nTo notify the application about prepare function failure, the error log\nwas added. In general, it should never fail in normal conditions, as the\nTx function checks for the available space in the Tx ring before the\npreparation even starts.\n\nFixes: 2081d5e2e92d (\"net/ena: add reset routine\")\nCc: stable@dpdk.org\n\nSigned-off-by: Michal Krawczyk <mk@semihalf.com>\nReviewed-by: Shai Brandes <shaibran@amazon.com>\nReviewed-by: Shay Agroskin <shayagr@amazon.com>\nChange-Id: Iff7b3a0e8b0b8e52f5230331b8486bb04a076d5b\n---\n drivers/net/ena/ena_ethdev.c | 4 ++++\n 1 file changed, 4 insertions(+)",
    "diff": "diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c\nindex 2335436b6c..67cd91046a 100644\n--- a/drivers/net/ena/ena_ethdev.c\n+++ b/drivers/net/ena/ena_ethdev.c\n@@ -2570,7 +2570,11 @@ static int ena_xmit_mbuf(struct ena_ring *tx_ring, struct rte_mbuf *mbuf)\n \trc = ena_com_prepare_tx(tx_ring->ena_com_io_sq,\t&ena_tx_ctx,\n \t\t&nb_hw_desc);\n \tif (unlikely(rc)) {\n+\t\tPMD_DRV_LOG(ERR, \"Failed to prepare Tx buffers, rc: %d\\n\", rc);\n \t\t++tx_ring->tx_stats.prepare_ctx_err;\n+\t\ttx_ring->adapter->reset_reason =\n+\t\t    ENA_REGS_RESET_DRIVER_INVALID_STATE;\n+\t\ttx_ring->adapter->trigger_reset = true;\n \t\treturn rc;\n \t}\n \n",
    "prefixes": [
        "v2",
        "3/6"
    ]
}