netdev - Re: [PATCH v6 net-next 02/19] ionic: Add basic framework for IONIC Network device driver

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Message-ID: <4e24ca02-48f1-9509-9b6f-1b3e59c04f99@pensando.io>
Date:   Fri, 30 Aug 2019 12:02:29 -0700
From:   Shannon Nelson <snelson@...sando.io>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH v6 net-next 02/19] ionic: Add basic framework for IONIC
 Network device driver

On 8/29/19 3:38 PM, Jakub Kicinski wrote:
> On Thu, 29 Aug 2019 11:27:03 -0700, Shannon Nelson wrote:
>> This patch adds a basic driver framework for the Pensando IONIC
>> network device.  There is no functionality right now other than
>> the ability to load and unload.
>>
>> Signed-off-by: Shannon Nelson <snelson@...sando.io>
>> diff --git a/drivers/net/ethernet/pensando/ionic/ionic_devlink.c b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
>> new file mode 100644
>> index 000000000000..6892409cd64b
>> --- /dev/null
>> +++ b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
>> @@ -0,0 +1,44 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
>> +
>> +#include <linux/module.h>
>> +#include <linux/netdevice.h>
>> +
>> +#include "ionic.h"
>> +#include "ionic_bus.h"
>> +#include "ionic_devlink.h"
>> +
>> +static int ionic_dl_info_get(struct devlink *dl, struct devlink_info_req *req,
>> +			     struct netlink_ext_ack *extack)
>> +{
>> +	devlink_info_driver_name_put(req, IONIC_DRV_NAME);
> This may fail, should the error not be propagated?

Will fix

>
>> +	return 0;
>> +}
>> +
>> +static const struct devlink_ops ionic_dl_ops = {
>> +	.info_get	= ionic_dl_info_get,
>> +};
>> +
>> +struct ionic *ionic_devlink_alloc(struct device *dev)
>> +{
>> +	struct ionic *ionic;
>> +	struct devlink *dl;
>> +
>> +	dl = devlink_alloc(&ionic_dl_ops, sizeof(struct ionic));
>> +	if (!dl) {
>> +		dev_warn(dev, "devlink_alloc failed");
> missing new line at the end of warning, but the warning is unnecessary,
> if memory allocation fails kernel will generate a big OOM splat, anyway

yep

>
>> +		return NULL;
>> +	}
>> +
>> +	ionic = devlink_priv(dl);
>> +
>> +	return ionic;
> return devlink_priv(dl);

yep

Thanks,
sln

>
>> +}
>> +
>> +void ionic_devlink_free(struct ionic *ionic)
>> +{
>> +	struct devlink *dl = priv_to_devlink(ionic);
>> +
>> +	devlink_free(dl);
>> +}