linux-kernel - Re: [PATCH] 460EX on-chip SATA driver<kernel 2.6.33>

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Message-ID: <1270626116.2300.68.camel@pasglop>
Date:	Wed, 07 Apr 2010 17:41:56 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Jeff Garzik <jgarzik@...ox.com>
Cc:	Rupjyoti Sarmah <rsarmah@...c.com>, linux-ide@...r.kernel.org,
	sr@...x.de, linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Subject: Re: [PATCH] 460EX on-chip SATA driver<kernel 2.6.33> <
 resubmission : 02>

On Tue, 2010-04-06 at 11:16 -0400, Jeff Garzik wrote:
> > +static irqreturn_t dma_dwc_interrupt(int irq, void *hsdev_instance)
> > +{
> > +     int chan;
> > +     u32 tfr_reg, err_reg;
> > +
> > +     struct sata_dwc_device *hsdev =
> > +             (struct sata_dwc_device *) hsdev_instance;
> > +     struct ata_host *host = (struct ata_host *) hsdev->host;
> > +     struct ata_port *ap;
> > +     struct sata_dwc_device_port *hsdevp;
> > +     u8 tag = 0;
> > +     unsigned int port = 0;
> > +     struct sata_dwc_host_priv *hp;
> > +     hp = kmalloc(sizeof(*hp), GFP_KERNEL);
> 
> 1) interrupt is not GFP_KERNEL
> 
> 2) you must failure kmalloc failure
> 
> 3) it is not clear to me where you initialize this structure???

And why the heck would you want to allocate it at interrupt time ? ? ?

BTW. Stefan mentioned earlier that they had some fixes for that driver
in the Denx tree. Are those fixes now included in that variant ?

Cheers,
Ben.


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