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Date: Mon, 8 May 2006 16:56:09 +0200
From: Andreas Mohr <andi@rhlx01.fht-esslingen.de>
To: Andrew Morton <akpm@osdl.org>
Cc: Florin Iucha <florin@iucha.net>, linux-kernel@vger.kernel.org,
       Linus Torvalds <torvalds@osdl.org>,
       Dominik Brodowski <linux@dominikbrodowski.net>
Subject: Re: pcmcia oops on 2.6.17-rc[12]
Message-ID: <20060508145609.GA3983@rhlx01.fht-esslingen.de>
References: <20060423192251.GD8896@iucha.net> <20060423150206.546b7483.akpm@osdl.org>
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Hi,

On Sun, Apr 23, 2006 at 03:02:06PM -0700, Andrew Morton wrote:
> It's actually not an oops - it's a warning, telling us that i82365 is
> requesting an IRQ in non-sharing mode, but there's already a handler
> registered for that IRQ (which might or might not be shareable).

And the same thing on a Toshiba Satellite 4280, P3/450, 2.6.17-rc3-ck2:

setup_irq: irq handler mismatch
 <c0103248> show_trace+0xd/0xf   <c010325f> dump_stack+0x15/0x17
 <c012aeca> setup_irq+0xd9/0xe8   <c012b002> request_irq+0x6e/0x8c
 <c020cdfd> serial8250_startup+0x263/0x394   <c020a1aa> uart_startup+0x68/0xf1
 <c020adba> uart_ioctl+0x554/0x847   <c01f31ed> tty_ioctl+0xbae/0xc36
 <c0151eec> do_ioctl+0x3c/0x4f   <c01520ed> vfs_ioctl+0x1ee/0x205
 <c015212e> sys_ioctl+0x2a/0x44   <c01029bb> sysenter_past_esp+0x54/0x75
setup_irq: irq handler mismatch
 <c0103248> show_trace+0xd/0xf   <c010325f> dump_stack+0x15/0x17
 <c012aeca> setup_irq+0xd9/0xe8   <c012b002> request_irq+0x6e/0x8c
 <c020cdfd> serial8250_startup+0x263/0x394   <c020a1aa> uart_startup+0x68/0xf1
 <c020a3aa> uart_open+0x177/0x345   <c01f399d> tty_open+0x174/0x29a
 <c014b0b5> chrdev_open+0xf6/0x10d   <c0143b37> __dentry_open+0xb7/0x185
 <c0143c73> nameidata_to_filp+0x1c/0x2e   <c0143cb3> do_filp_open+0x2e/0x35
 <c0143d9e> do_sys_open+0x3f/0xb7   <c0143e42> sys_open+0x16/0x18
 <c01029bb> sysenter_past_esp+0x54/0x75


setup_irq: irq handler mismatch
 <c0103248> show_trace+0xd/0xf   <c010325f> dump_stack+0x15/0x17
 <c012aeca> setup_irq+0xd9/0xe8   <c012b002> request_irq+0x6e/0x8c
 <c020cdfd> serial8250_startup+0x263/0x394   <c020a1aa> uart_startup+0x68/0xf1
 <c020a3aa> uart_open+0x177/0x345   <c01f399d> tty_open+0x174/0x29a
 <c014b0b5> chrdev_open+0xf6/0x10d   <c0143b37> __dentry_open+0xb7/0x185
 <c0143c73> nameidata_to_filp+0x1c/0x2e   <c0143cb3> do_filp_open+0x2e/0x35
 <c0143d9e> do_sys_open+0x3f/0xb7   <c0143e42> sys_open+0x16/0x18
 <c01029bb> sysenter_past_esp+0x54/0x75

# cat /proc/interrupts
           CPU0
  0:   31607214          XT-PIC  timer
  1:      11092          XT-PIC  i8042
  2:          0          XT-PIC  cascade
  3:      36368          XT-PIC  pcnet_cs
  8:          3          XT-PIC  rtc
  9:         84          XT-PIC  acpi
 11:      73639          XT-PIC  yenta, yenta, uhci_hcd:usb1, YMFPCI, irda0
 12:       9996          XT-PIC  i8042
 14:      63830          XT-PIC  ide0
 15:     536942          XT-PIC  ide1
NMI:          0
LOC:          0
ERR:          0

# lspci
0000:00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 03)
0000:00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 03)
0000:00:05.0 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02)
0000:00:05.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
0000:00:05.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB (rev 01)
0000:00:05.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
0000:00:07.0 Communication controller: Agere Systems 56k WinModem (rev 01)
0000:00:09.0 IRDA controller: Toshiba America Info Systems FIR Port Type-DO
0000:00:0b.0 CardBus bridge: Toshiba America Info Systems ToPIC100 PCI to Cardbus Bridge with ZV Support (rev 20)
0000:00:0b.1 CardBus bridge: Toshiba America Info Systems ToPIC100 PCI to Cardbus Bridge with ZV Support (rev 20)
0000:00:0c.0 Multimedia audio controller: Yamaha Corporation YMF-744B [DS-1S Audio Controller] (rev 02)
0000:01:00.0 VGA compatible controller: S3 Inc. 86C270-294 Savage/IX-MV (rev 11)

> Your machine should otherwise continue to work OK.  Is that the case?

It seems so, yes.

> i82365 appears to be poking around in interrupt space trying to find an IRQ
> which isn't shared with anyone else (I'm not sure why, but these sorts of
> things tend to be derived from hard experience).
> 
> Anyway.  We need to either a) make i82365 better-behaved or b) remove the
> warning or c) allow callers to suppress the warning (SA_PROBEIRQ?).

Add SA_PROBEIRQ to 8250.c, then, I guess?

Thanks!

Andreas Mohr
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