From: Christoph Fritz <christoph.fritz@hexdev.de>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Oliver Hartkopp" <socketcan@hartkopp.net>,
"Marc Kleine-Budde" <mkl@pengutronix.de>,
"Jiri Slaby" <jirislaby@kernel.org>,
"Vincent Mailhol" <mailhol.vincent@wanadoo.fr>,
"David S . Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Jiri Kosina" <jikos@kernel.org>,
"Benjamin Tissoires" <bentiss@kernel.org>,
"Sebastian Reichel" <sre@kernel.org>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Andreas Lauser" <andreas.lauser@mercedes-benz.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Pavel Pisa" <pisa@cmp.felk.cvut.cz>,
linux-can@vger.kernel.org, Netdev <netdev@vger.kernel.org>,
devicetree@vger.kernel.org, linux-input@vger.kernel.org,
linux-serial <linux-serial@vger.kernel.org>
Subject: Re: [PATCH v3 01/11] can: Add LIN bus as CAN abstraction
Date: Thu, 09 May 2024 19:06:19 +0200 [thread overview]
Message-ID: <333fae36f2332b705320186c2068e1236c9d1142.camel@hexdev.de> (raw)
In-Reply-To: <2024050852-vixen-arson-cb42@gregkh>
On Wed, 2024-05-08 at 19:48 +0100, Greg Kroah-Hartman wrote:
> On Wed, May 08, 2024 at 08:20:51PM +0200, Christoph Fritz wrote:
> > ...
> > > ...
> > > > > > +static int lin_create_sysfs_id_files(struct net_device *ndev)
> > > > > > +{
> > > > > > + struct lin_device *ldev = netdev_priv(ndev);
> > > > > > + struct kobj_attribute *attr;
> > > > > > + int ret;
> > > > > > +
> > > > > > + for (int id = 0; id < LIN_NUM_IDS; id++) {
> > > > > > + ldev->sysfs_entries[id].ldev = ldev;
> > > > > > + attr = &ldev->sysfs_entries[id].attr;
> > > > > > + attr->attr.name = kasprintf(GFP_KERNEL, "%02x", id);
> > > > > > + if (!attr->attr.name)
> > > > > > + return -ENOMEM;
> > > > > > + attr->attr.mode = 0644;
> > > > > > + attr->show = lin_identifier_show;
> > > > > > + attr->store = lin_identifier_store;
> > > > > > +
> > > > > > + sysfs_attr_init(&attr->attr);
> > > > > > + ret = sysfs_create_file(ldev->lin_ids_kobj, &attr->attr);
> > > > > > + if (ret) {
> > > > > > + kfree(attr->attr.name);
> > > > > > + return -ENOMEM;
> > > > > > + }
> > > > > > + }
> > > > > > +
> > > > > > + return 0;
> > > > > > +}
> > > > >
> > > > > Can you use .dev_groups instead ?
> > > >
> > > > I'm not sure where to attach this in this glue code here. Should I do a
> > > > class_register() and add the .dev_groups there?
> > >
> > > I guess struct class would be correct direction but I'm not sure if it's
> > > viable in this case. It would avoid the need for custom sysfs setup code
> > > if it's workable.
> >
> > I just tried to find a way, but these are 64 sysfs files and declaring
> > them all static looks a bit odd to me. I might be missing something
> > here.
> >
> > For v4 I would stick to the dynamic setup and fix the rollback.
> >
> > Any objections?
>
> Yes, you race with userspace and loose by trying to do this "by hand".
> Make this static please.
OK, static init coming up in v4
thanks
-- Christoph
next prev parent reply other threads:[~2024-05-09 17:06 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-02 18:27 [PATCH v3 00/11] LIN Bus support for Linux Christoph Fritz
2024-05-02 18:27 ` [PATCH v3 01/11] can: Add LIN bus as CAN abstraction Christoph Fritz
2024-05-06 16:24 ` Ilpo Järvinen
2024-05-08 12:47 ` Christoph Fritz
2024-05-08 13:08 ` Ilpo Järvinen
2024-05-08 18:20 ` Christoph Fritz
2024-05-08 18:48 ` Greg Kroah-Hartman
2024-05-09 17:06 ` Christoph Fritz [this message]
2024-05-02 18:27 ` [PATCH v3 02/11] HID: hexLIN: Add support for USB LIN bus adapter Christoph Fritz
2024-05-06 16:53 ` Ilpo Järvinen
2024-05-09 17:06 ` Christoph Fritz
2024-05-10 9:31 ` Ilpo Järvinen
2024-05-02 18:27 ` [PATCH v3 03/11] tty: serdev: Add flag buffer aware receive_buf_fp() Christoph Fritz
2024-05-04 16:00 ` Greg Kroah-Hartman
2024-05-08 8:48 ` Christoph Fritz
2024-05-02 18:27 ` [PATCH v3 04/11] tty: serdev: Add method to enable break flags Christoph Fritz
2024-05-02 18:27 ` [PATCH v3 05/11] dt-bindings: vendor-prefixes: Add hexDEV Christoph Fritz
2024-05-02 18:27 ` [PATCH v3 06/11] dt-bindings: net/can: Add serial (serdev) LIN adapter Christoph Fritz
2024-05-03 17:12 ` Conor Dooley
2024-05-03 18:29 ` Christoph Fritz
2024-05-06 16:16 ` Conor Dooley
2024-05-06 18:50 ` Krzysztof Kozlowski
2024-05-08 11:34 ` Christoph Fritz
2024-05-08 16:16 ` Conor Dooley
2024-05-02 18:28 ` [PATCH v3 07/11] can: Add support for serdev LIN adapters Christoph Fritz
2024-05-06 17:03 ` Ilpo Järvinen
2024-05-09 17:06 ` Christoph Fritz
2024-05-02 18:28 ` [PATCH v3 08/11] can: bcm: Add LIN answer offloading for responder mode Christoph Fritz
2024-05-06 17:08 ` Ilpo Järvinen
2024-05-09 17:06 ` Christoph Fritz
2024-05-02 18:28 ` [PATCH v3 09/11] can: lin: Handle rx offload config frames Christoph Fritz
2024-05-06 17:11 ` Ilpo Järvinen
2024-05-09 17:07 ` Christoph Fritz
2024-05-02 18:28 ` [PATCH v3 10/11] can: lin: Support setting LIN mode Christoph Fritz
2024-05-02 18:28 ` [PATCH v3 11/11] HID: hexLIN: Implement ability to update lin mode Christoph Fritz
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