linux-kernel - Re: PCMCIA regression

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Message-ID: <Pine.LNX.4.64.1005260726130.28795@hs20-bc2-1.build.redhat.com>
Date:	Wed, 26 May 2010 07:27:27 -0400 (EDT)
From:	Mikulas Patocka <mpatocka@...hat.com>
To:	"Justin P. Mattock" <justinmattock@...il.com>
cc:	Dominik Brodowski <linux@...inikbrodowski.net>,
	linux-kernel@...r.kernel.org
Subject: Re: PCMCIA regression



On Wed, 26 May 2010, Justin P. Mattock wrote:

> On 05/25/2010 01:25 PM, Mikulas Patocka wrote:
> > Hi
> > 
> > The commit a8408c17d0038b76a83affb1b56dc18fa1e7ed86 in Linux 2.6.34-rc6
> > broke pcmcia for me. I use 3c574 network card in yenta socket on Armada
> > 7400 laptop. My distribution is Debian lenny.
> > 
> > Reverting the test for "s->functions" in pccard_validate_cis makes the
> > network card work again.
> > 
> > Mikulas
> > 
> > May 20 14:17:21 gerlinda vmunix: ------------[ cut here ]------------
> > May 20 14:17:21 gerlinda vmunix: WARNING: at drivers/pcmcia/cistpl.c:1488
> > pccard_validate_cis+0x287/0x2d0 [pcmcia]()
> > May 20 14:17:21 gerlinda vmunix: Modules linked in: 3c574_cs ohci_hcd
> > pcmcia rtc_cmos crc32 ide_cd_mod rtc_core usbcore rtc_lib yenta_socket
> > cdrom psmouse pcspkr rsrc_nonstatic nls_base pcmcia_core unix
> > May 20 14:17:21 gerlinda vmunix: Pid: 1486, comm: pccardd Not tainted
> > 2.6.34-fast #15
> > May 20 14:17:21 gerlinda vmunix: Call Trace:
> > May 20 14:17:21 gerlinda vmunix:  [<cc95cc57>] ?
> > pccard_validate_cis+0x287/0x2d0 [pcmcia]
> > May 20 14:17:21 gerlinda vmunix:  [<cc95cc57>] ?
> > pccard_validate_cis+0x287/0x2d0 [pcmcia]
> > May 20 14:17:21 gerlinda vmunix:  [<c10207d6>] ?
> > warn_slowpath_common+0x76/0xd0 May 20 14:17:21 gerlinda vmunix:
> > [<cc95cc57>] ? pccard_validate_cis+0x287/0x2d0 [pcmcia]
> > May 20 14:17:21 gerlinda vmunix:  [<c1020843>] ?
> > warn_slowpath_null+0x13/0x20
> > May 20 14:17:21 gerlinda vmunix:  [<cc95cc57>] ?
> > pccard_validate_cis+0x287/0x2d0 [pcmcia]
> > May 20 14:17:21 gerlinda vmunix:  [<cc83517a>] ?
> > pcmcia_nonstatic_validate_mem+0xda/0x180 [rsrc_nonstatic]
> > May 20 14:17:21 gerlinda vmunix:  [<c10ce0af>] ?
> > sysfs_addrm_finish+0x7f/0xb0
> > May 20 14:17:21 gerlinda vmunix:  [<cc9587c2>] ? pcmcia_card_add+0x72/0xf0
> > [pcmcia]
> > May 20 14:17:21 gerlinda vmunix:  [<c10f39e0>] ? kobject_release+0x0/0xa0
> > May 20 14:17:21 gerlinda vmunix:  [<c10f44c9>] ? kref_put+0x29/0x60
> > May 20 14:17:21 gerlinda vmunix:  [<cc9577cc>] ?
> > pcmcia_card_remove+0x8c/0xa0 [pcmcia]
> > May 20 14:17:21 gerlinda vmunix:  [<cc958a24>] ? pcmcia_requery+0x74/0x130
> > [pcmcia]
> > May 20 14:17:21 gerlinda vmunix:  [<c101af4e>] ? set_next_entity+0x2e/0x70
> > May 20 14:17:21 gerlinda vmunix:  [<c101c500>] ?
> > do_sched_setscheduler+0x90/0xa0May 20 14:17:21 gerlinda vmunix:
> > [<c11c0883>] ? schedule+0x203/0x3c0
> > May 20 14:17:21 gerlinda vmunix:  [<cc818109>] ? pccardd+0x219/0x470
> > [pcmcia_core]
> > May 20 14:17:21 gerlinda vmunix:  [<c11c095a>] ? schedule+0x2da/0x3c0
> > May 20 14:17:21 gerlinda vmunix:  [<cc817ef0>] ? pccardd+0x0/0x470
> > [pcmcia_core]May 20 14:17:21 gerlinda vmunix:  [<c1035124>] ?
> > kthread+0x74/0x80
> > May 20 14:17:21 gerlinda vmunix:  [<c10350b0>] ? kthread+0x0/0x80
> > May 20 14:17:21 gerlinda vmunix:  [<c10030f6>] ?
> > kernel_thread_helper+0x6/0x10
> > May 20 14:17:21 gerlinda vmunix: ---[ end trace 256ec3e16d1d0f46 ]---
> > 
> > 
> > 
> > --
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> > 
> >    
> 
> maybe this is similar:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=16015
> 
> Justin P. Mattock

No, it's different. The bug that I have is a code logic error, the 
function pccard_validate_cis is called when it shouldn't be.

Mikulas
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