From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v9 1/1] PRUSS UIO driver support
Date: Tue, 8 Mar 2011 14:24:00 +0100 [thread overview]
Message-ID: <201103081424.01476.arnd@arndb.de> (raw)
In-Reply-To: <alpine.LFD.2.00.1103081133510.2787@localhost6.localdomain6>
On Tuesday 08 March 2011, Thomas Gleixner wrote:
> >
> > +static irqreturn_t pruss_handler(int irq, struct uio_info *info) {
> > + struct pruss_priv *priv = info->priv;
> > + struct uio_pruss_dev *gdev = priv->pupdev;
> >
> > Note that info is a pointer to array supporting 8 interrupts. This allows to
> > redirect to driver structure via info->priv quickly.
>
> struct uio_pruss_dev *dev = container_of(info, struct uio_pruss_dev, info);
>
> Perhaps ?
That would require having the same number of uio_info structs as uio_pruss_dev
instances. Right now, one platform device has one uio_pruss_dev instance, which
has 8 uio_info instances, so the container_of() trick doesn't work.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: "TK, Pratheesh Gangadhar" <pratheesh@ti.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"hjk@hansjkoch.de" <hjk@hansjkoch.de>,
"gregkh@suse.de" <gregkh@suse.de>,
"sshtylyov@mvista.com" <sshtylyov@mvista.com>,
"Chatterjee, Amit" <amit.chatterjee@ti.com>,
"davinci-linux-open-source@linux.davincidsp.com"
<davinci-linux-open-source@linux.davincidsp.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v9 1/1] PRUSS UIO driver support
Date: Tue, 8 Mar 2011 14:24:00 +0100 [thread overview]
Message-ID: <201103081424.01476.arnd@arndb.de> (raw)
In-Reply-To: <alpine.LFD.2.00.1103081133510.2787@localhost6.localdomain6>
On Tuesday 08 March 2011, Thomas Gleixner wrote:
> >
> > +static irqreturn_t pruss_handler(int irq, struct uio_info *info) {
> > + struct pruss_priv *priv = info->priv;
> > + struct uio_pruss_dev *gdev = priv->pupdev;
> >
> > Note that info is a pointer to array supporting 8 interrupts. This allows to
> > redirect to driver structure via info->priv quickly.
>
> struct uio_pruss_dev *dev = container_of(info, struct uio_pruss_dev, info);
>
> Perhaps ?
That would require having the same number of uio_info structs as uio_pruss_dev
instances. Right now, one platform device has one uio_pruss_dev instance, which
has 8 uio_info instances, so the container_of() trick doesn't work.
Arnd
next prev parent reply other threads:[~2011-03-08 13:24 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-03 18:07 [PATCH v9 0/1] Add PRUSS UIO driver support Pratheesh Gangadhar
2011-03-03 18:07 ` Pratheesh Gangadhar
2011-03-03 18:07 ` [PATCH v9 1/1] " Pratheesh Gangadhar
2011-03-03 18:07 ` Pratheesh Gangadhar
2011-03-03 18:15 ` Arnd Bergmann
2011-03-03 18:15 ` Arnd Bergmann
2011-03-04 3:25 ` TK, Pratheesh Gangadhar
2011-03-04 3:25 ` TK, Pratheesh Gangadhar
2011-03-08 10:34 ` Thomas Gleixner
2011-03-08 10:34 ` Thomas Gleixner
2011-03-08 13:24 ` Arnd Bergmann [this message]
2011-03-08 13:24 ` Arnd Bergmann
2011-03-08 15:01 ` Thomas Gleixner
2011-03-08 15:01 ` Thomas Gleixner
2011-03-04 4:40 ` TK, Pratheesh Gangadhar
2011-03-04 4:40 ` TK, Pratheesh Gangadhar
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