linux-kernel - Re: [004/244] sfi: table irq 0xFF means no interrupt

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Date:	Thu, 29 Sep 2011 17:33:46 +0300
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Greg KH <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Alan Cox <alan@...ux.intel.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: Re: [004/244] sfi: table irq 0xFF means no interrupt

On Thu, Sep 29, 2011 at 07:18:27AM -0700, Greg KH wrote:
> On Thu, Sep 29, 2011 at 01:21:00PM +0300, Kirill A. Shutemov wrote:
> > On Wed, Sep 28, 2011 at 02:59:28PM -0700, Greg KH wrote:
> > > 3.0-stable review patch.  If anyone has any objections, please let us know.
> > > 
> > > ------------------
> > > 
> > > From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
> > > 
> > > commit a94cc4e6c0a26a7c8f79a432ab2c89534aa674d5 upstream.
> > > 
> > > According to the SFI specification irq number 0xFF means device has no
> > > interrupt or interrupt attached via GPIO.
> > > 
> > > Currently, we don't handle this special case and set irq field in
> > > *_board_info structs to 255.  It leads to confusion in some drivers.
> > > Accelerometer driver tries to register interrupt 255, fails and prints
> > > "Cannot get IRQ" to dmesg.
> > > 
> > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> > > Signed-off-by: Alan Cox <alan@...ux.intel.com>
> > > Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
> > > Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> > 
> > Please, take this as well:
> > 
> > http://lkml.org/lkml/2011/9/14/40
> 
> Is that patch in Linus's tree?

No, it isn't.

Do not apply "sfi: table irq 0xFF means no interrupt" in this case. It
breaks kexec. Better to take both patches into next stable release.

-- 
 Kirill A. Shutemov
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