linux-kernel - Re: [3.8-rc4 arm] SCSI_SYM53C8XX

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Date:	Sun, 27 Jan 2013 00:52:58 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc:	rob.herring@...xeda.com, grant.likely@...retlab.ca,
	rmk+kernel@....linux.org.uk, linux-kernel@...r.kernel.org
Subject: Re: [3.8-rc4 arm] SCSI_SYM53C8XX_2 module cannot register IRQ

On Sat, Jan 26, 2013 at 9:17 AM, Tetsuo Handa
<penguin-kernel@...ove.sakura.ne.jp> wrote:

> I did a blind git bisection (i.e. starting
>
>   $ qemu-system-arm -M versatilepb -hda hda.img -kernel arch/arm/boot/zImage -append "root=/dev/sda1 init=/bin/sh" -nographic
>
> and watching "top" for %CPU usage of qemu-system-arm , assuming that it goes to
> 100% only if detection of block device for / partition failed and kernel called
> panic(), goes to 0% otherwise) in two patterns.
>
>   $ git bisect start HEAD b1112249 v3.7 v3.6 v3.5 v3.4 v3.3 v3.2 v3.1 v3.0 -- arch/arm drivers/scsi/sym53c8xx_2/ drivers/scsi/*.[ch]
>
>   $ git bisect start v3.8-rc1 95e629b7 b8db6b8 810883f0 b10bca0b 14318efb 414a6750e b1112249 v3.7 v3.6 v3.5 v3.4 v3.3 v3.2 v3.1 v3.0
>
> Both patterns resulted in that commit 07c9249f
> "ARM: 7554/1: VIC: use irq_domain_add_simple()" is the cause of
>
>   PCI: enabling device 0000:00:0c.0 (0100 -> 0103)
>   sym0: <895a> rev 0x0 at pci 0000:00:0c.0 irq 27
>   sym0: No NVRAM, ID 7, Fast-40, LVD, parity checking
>   sym0: request irq 27 failure
>   sym0: giving up ...
>
> message.
>
> Would you have a look?

I'm trying to reproduce this, but how do you reconfigure the kernel to
get PCI, SCSI and such stuff enabled?

The stock versatile_defconfig does not even have SCSI enabled...

Yours,
Linus Walleij
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