From mboxrd@z Thu Jan  1 00:00:00 1970
From: kbusch@kernel.org (Keith Busch)
Date: Mon, 13 May 2019 07:50:31 -0600
Subject: [PATCH v3 5/7] nvme-pci: add device coredump infrastructure
In-Reply-To: <1557676457-4195-6-git-send-email-akinobu.mita@gmail.com>
References: <1557676457-4195-1-git-send-email-akinobu.mita@gmail.com>
 <1557676457-4195-6-git-send-email-akinobu.mita@gmail.com>
Message-ID: <20190513135031.GC15318@localhost.localdomain>

On Sun, May 12, 2019@08:54:15AM -0700, Akinobu Mita wrote:
> +static void nvme_coredump_logs(struct nvme_dev *dev)
> +{
> +	struct dev_coredumpm_bulk_data *bulk_data;
> +
> +	if (!dev->dumps)
> +		return;
> +
> +	bulk_data = nvme_coredump_alloc(dev, 1);
> +	if (!bulk_data)
> +		return;
> +
> +	if (nvme_coredump_telemetry_log(bulk_data, &dev->ctrl))
> +		dev->num_dumps--;
> +}

You'll need this function to return the same 'int' value from
nvme_coredump_telemetry_log. A negative value here means that the
device didn't produce a response, and that's important to check from
the reset work since you'll need to abort the reset if that happens.