From: "Hans J. Koch" <hjk@hansjkoch.de>
To: Hillf Danton <dhillf@gmail.com>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>, Greg KH <gregkh@suse.de>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] uio: fix allocating minor id for uio device
Date: Thu, 31 Mar 2011 19:55:13 +0200 [thread overview]
Message-ID: <20110331175513.GC2734@local> (raw)
In-Reply-To: <AANLkTi=AqMzS_cC1WRB+Knx1GT_Oha01kOyxC1TqyWxE@mail.gmail.com>
On Thu, Mar 31, 2011 at 08:38:47PM +0800, Hillf Danton wrote:
> The number of uio devices that could be used should be less than
> UIO_MAX_DEVICES by design, and this work guards any cases in which id
> more than UIO_MAX_DEVICES is utilized.
Looks good.
Thanks for your work,
Hans
>
> Signed-off-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Hans J. Koch <hjk@hansjkoch.de>
> ---
>
> --- a/drivers/uio/uio.c 2011-01-05 08:50:20.000000000 +0800
> +++ b/drivers/uio/uio.c 2011-03-31 20:43:44.000000000 +0800
> @@ -381,7 +381,13 @@ static int uio_get_minor(struct uio_devi
> retval = -ENOMEM;
> goto exit;
> }
> - idev->minor = id & MAX_ID_MASK;
> + if (id < UIO_MAX_DEVICES) {
> + idev->minor = id;
> + } else {
> + dev_err(idev->dev, "too many uio devices\n");
> + retval = -EINVAL;
> + idr_remove(&uio_idr, id);
> + }
> exit:
> mutex_unlock(&minor_lock);
> return retval;
>
next prev parent reply other threads:[~2011-03-31 17:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-27 8:00 [PATCH] uio: fix allocating minor id for uio device Hillf Danton
2011-03-28 21:45 ` Hans J. Koch
2011-03-29 8:40 ` Wolfram Sang
2011-03-31 12:38 ` Hillf Danton
2011-03-31 17:55 ` Hans J. Koch [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-03-27 7:22 zhdxzx
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