From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965653AbWFYW4F (ORCPT ); Sun, 25 Jun 2006 18:56:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965647AbWFYW4E (ORCPT ); Sun, 25 Jun 2006 18:56:04 -0400 Received: from web50406.mail.yahoo.com ([206.190.38.71]:36775 "HELO web50406.mail.yahoo.com") by vger.kernel.org with SMTP id S932411AbWFYW4D (ORCPT ); Sun, 25 Jun 2006 18:56:03 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:Received:Date:From:Subject:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding; b=4eebEUhwAUevA3BYznKwRuZ/FkGvw/WEHikieC9SP2GkTUeucMtlnllmXGsbRULzDdVQDZGTzhgfCBzbbsEd6D2Hkrp3lrqW/fEPnqihgzyCiUpr5l7bEzV1aAEB+BxyASBaBYDvwO4oXGeKIOvUPKxdBl8RRZc+sa6Z4hV9dW0= ; Message-ID: <20060625225557.76929.qmail@web50406.mail.yahoo.com> Date: Sun, 25 Jun 2006 15:55:56 -0700 (PDT) From: Alex Davis Subject: Re: Kernel panic when re-inserting Adaptec PCMCIA card To: Chuck Ebbert <76306.1226@compuserve.com> Cc: linux-kernel , linux-scsi MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --- Alex Davis wrote: > --- Alex Davis wrote: > > > --- Chuck Ebbert <76306.1226@compuserve.com> wrote: > > > > > In-Reply-To: <20060614022139.21737.qmail@web50208.mail.yahoo.com> > > > > > > On Tue, 13 Jun 2006 19:21:39 -0700, Alex Davis wrote: > > > > > > Same panic occurs in 2.6.17rc6: > > > > > > > Jun 13 17:50:36 siafu kernel: [4295220.230000] pccard: PCMCIA card inserted into slot 0 > > > > Jun 13 17:50:36 siafu kernel: [4295220.230000] pcmcia: registering new device pcmcia0.0 > > > > Jun 13 17:50:37 siafu kernel: [4295220.281000] aha152x: resetting bus... > > > > Jun 13 17:50:37 siafu kernel: [4295220.637000] aha152x13: vital data: rev=1, io=0xd340 > > > > (0xd340/0xd340), irq=3, scsiid=7, reconnect=enabled, > > > > parity=enabled, synchronous=enabled, delay=100, extended translation=disabled > > > > Jun 13 17:50:37 siafu kernel: [4295220.637000] aha152x13: trying software interrupt, ok. > > > > Jun 13 17:50:37 siafu kernel: [4295221.638000] scsi13 : Adaptec 152x SCSI driver; > $Revision: > > > 2.7 $ > > > > Jun 13 17:50:37 siafu kernel: [4295221.650000] > > > > Jun 13 17:50:37 siafu kernel: [4295221.650000] aha152x22856: bottom-half already running!? > > > > Jun 13 17:50:37 siafu kernel: [4295221.650000] > > > > Jun 13 17:50:37 siafu kernel: [4295221.650000] queue status: > > > > Jun 13 17:50:37 siafu kernel: [4295221.650000] issue_SC: > > > > Jun 13 17:50:37 siafu kernel: [4295221.650000] current_SC: > > > > Jun 13 17:50:37 siafu kernel: [4295221.650000] BUG: unable to handle kernel paging request > > at > > > > virtual address 00020016 > > > > > > Something is going very wrong here. At time .637 it says it is > > > adapter number 13 (aha152x13.) Then at .650 it thinks it's > > > adapter nr. 22856 (!) Looks like some kind of pointer to the > > > hostdata is corrupted. > > > > > > Can you rmmod the driver after removing the card and see if that > > > helps? > > > > > It turns out I was trying to remove the driver before doing 'pccardctl eject'. > > > > It seems that removing the driver after ejecting make the problem go away: > > I ejected and re-inserted the card six times with no crash. > > > > I'll continue testing just to make sure. I now know what the problem is. In drivers/scsi/aha152x.c, there is an array of two scsi hosts: static struct Scsi_Host *aha152x_host[2]; There is also the aha152x_probe_one method. The problem is that each re-insert of the card creates a new 'host' via aha152x_probe_one, which increments the registered_count variable. This variable is used as an index into the afore- mentioned 2-element host array. When registered_count is 2 or greater we're in no-man's land, hence the crashes. I'm currently testing a fix for this, which I hope to post soon. -Alex I code, therefore I am __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com