Date: Thu, 9 Jan 2003 11:06:33 -0500
From: "Murray J. Root" <murrayr@brain.org>
To: linux-kernel@vger.kernel.org
Subject: Re: USB CF reader reboots PC - DEVFS did it
Message-ID: <20030109160633.GA1175@Master.Wizards>
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On Wed, Jan 08, 2003 at 11:51:30AM -0500, Murray J. Root wrote:
> ASUS P4S533 (SiS645DX chipset)
> P4 2GHz
> 1G PC2700 RAM
> SanDisk SDDR-77 ImageMate Dual Card Reader (using only CF cards)
> 
> ----------------------------
> devfs compiled in to kernel, devfs=nomount in lilo.conf
>   
> Insert CF card. mount it. cd to it, do reads and/or writes
> umount card. remove card.
> insert a different card (does not happen if the same card is used)
> mount it. system reboots. logs are corrupted
> 
> Doesn't happen every time for read - sometimes I can read 2 or 3 cards first
> Happens every time for write - if I write to a card then changing cards
> causes a reboot
> 
> ----------------------------
> devfs=mount in lilo.conf
>               
> Insert CF card. 
> ls /dev shows sda and sda1
> mount it. 
> ls /dev shows sda - no sda1
> cd to mounted CF card
> process hangs, sd-mod & usb-storage "busy"
> rmmod -f usb-storage or sd-mod causes PC to stop
> (keyboard & mouse unresponsive, wmfire frozen, net disconnects)
> 
> reboot
> Insert CF card. 
> ls /dev shows sda & sda1
> mount it. 
> ls /dev shows sda - no sda1
> umount it
> ls /dev shows sda - no sda1
> modprobe -r sd-mod && modprobe sd-mod 
> ls /dev shows sda & sda1
> 

New - 2.5.55
No more reboot - just a seg fault when trying to mount a new card
and process hangs if I try again (not surprising).

Removed devfs completely from build - everything works fine.
Can mount, read, write, umount many cards without a problem.

-- 
Murray J. Root
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