From: Greg KH <gregkh@linuxfoundation.org>
To: Vitor Soares <Vitor.Soares@synopsys.com>
Cc: linux-kernel@vger.kernel.org, linux-i3c@lists.infradead.org,
Joao.Pinto@synopsys.com, bbrezillon@kernel.org,
wsa@the-dreams.de, arnd@arndb.de, broonie@kernel.org
Subject: Re: [RFC 5/5] i3c: add i3cdev module to expose i3c dev in /dev
Date: Thu, 12 Dec 2019 15:46:27 +0100 [thread overview]
Message-ID: <20191212144627.GC1668196@kroah.com> (raw)
In-Reply-To: <f9f20eaf900ed5629dd3d824bc1e90c7e6b4a371.1575977795.git.vitor.soares@synopsys.com>
On Tue, Dec 10, 2019 at 04:37:33PM +0100, Vitor Soares wrote:
> +static struct i3cdev_data *i3cdev_get_by_minor(unsigned int minor)
Why? Why not just embed the structure in the cdev if you really need
it?
> +static struct i3cdev_data *get_free_i3cdev(struct i3c_device *i3c)
> +{
> + struct i3cdev_data *i3cdev;
> + unsigned long minor;
> +
> + minor = find_first_zero_bit(minors, N_I3C_MINORS);
No locking, fun!!!
:(
Why not use an idr instead, that is what it is there for. Don't try to
roll your own.
thanks,
greg k-h
prev parent reply other threads:[~2019-12-12 14:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-10 15:37 [RFC 0/5] Introduce i3c device userspace interface Vitor Soares
2019-12-10 15:37 ` [RFC 1/5] i3c: master: export i3c_masterdev_type Vitor Soares
2019-12-10 15:37 ` [RFC 2/5] i3c: master: export i3c_bus_type symbol Vitor Soares
2019-12-10 15:37 ` [RFC 3/5] i3c: device: expose transfer strutures to uapi Vitor Soares
2019-12-12 14:42 ` Greg KH
2019-12-12 14:48 ` Vitor Soares
2019-12-10 15:37 ` [RFC 4/5] i3c: master: add i3c_for_each_dev helper Vitor Soares
2019-12-10 15:37 ` [RFC 5/5] i3c: add i3cdev module to expose i3c dev in /dev Vitor Soares
2019-12-10 17:51 ` Arnd Bergmann
2019-12-10 19:15 ` Vitor Soares
2019-12-10 19:37 ` Arnd Bergmann
2019-12-11 15:07 ` Vitor Soares
2019-12-11 15:33 ` Arnd Bergmann
2019-12-20 12:39 ` Vitor Soares
2019-12-12 14:44 ` Greg KH
2019-12-12 14:56 ` Vitor Soares
2019-12-12 16:00 ` Greg KH
2019-12-12 17:25 ` Vitor Soares
2019-12-12 17:32 ` Greg KH
2019-12-12 14:46 ` Greg KH [this message]
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