linux-kernel - Re: [Patch 1/1] cciss: bug fix, prevent cciss from loading in kdump kernel

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Date:	Thu, 18 Apr 2013 10:19:07 -0500
From:	"Mike Miller (OS Dev)" <mike.miller@...com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jens Axboe <axboe@...nel.dk>, LKML <linux-kernel@...r.kernel.org>,
	LKML-scsi <linux-scsi@...r.kernel.org>
Subject: Re: [Patch 1/1] cciss: bug fix, prevent cciss from loading in
 kdump kernel

On Wed, 2013-04-17 at 15:02 -0700, Andrew Morton wrote:
> On Mon, 15 Apr 2013 12:59:06 -0500 Mike Miller <mike.miller@...com> wrote:
> 
> > Patch 1/1
> > 
> > If hpsa is selected as the Smart Array driver cciss may try to load in the
> > kdump kernel. When this happens kdump fails and a core file cannot be created.
> > This patch prevents cciss from trying to load in this scenario. This effects
> > primarily older Smart Array controllers.
> > 
> > ...
> >
> > --- a/drivers/block/cciss.c
> > +++ b/drivers/block/cciss.c
> > @@ -4960,6 +4960,12 @@ static int cciss_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
> >  	ctlr_info_t *h;
> >  	unsigned long flags;
> >  
> > +	/*
> > +	 * if this is the kdump kernel and the user has set the flags to
> > +	 * use hpsa rather than cciss just bail
> > +	 */
> > +	if ((reset_devices) && (cciss_allow_hpsa == 1))
> > +		return -ENODEV;
> 
> OK, wazzup.  That's the only occurrence of the symbol
> "cciss_allow_hpsa" in Linux and needless to say, the compiler laughed
> at me.

Argh. Sorry about that. I could have sworn I tested that on rc7. I'll
have another patch ready in a bit to add the flag.

> 


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