[bisected] lx6464es fails to open a second time

[Tim Blechmann <tim@klingt.org>]

hi all, especially brian and takashi,

some time ago, i've been developing the driver for the lx6464es ethersound 
sound card, which has been included into the kernel for some time. however i 
haven't been able to use it in kernels after 2.6.33.

today, i was able to bisect the issue and the first bad commit is:

commit 6175ddf06b6172046a329e3abfd9c901a43efd2e
Author: Brian Gerst <brgerst@gmail.com>
Date:   Fri Feb 5 09:37:07 2010 -0500

    x86: Clean up mem*io functions.
    
    Iomem has no special significance on x86.  Use the standard mem*
    functions instead of trying to call other versions.  Some fixups
    are needed to match the function prototypes.
    
    Signed-off-by: Brian Gerst <brgerst@gmail.com>
    LKML-Reference: <1265380629-3212-6-git-send-email-brgerst@gmail.com>
    Signed-off-by: H. Peter Anvin <hpa@zytor.com>


the problem was: the sound card could only be started once, but i haven't been 
able to start it a second time, probably because the driver doesn't shut down 
the device correctly.

the communication with the device is done by passing simple commands via 
memcpy_fromio and memcpy_toio (compare sound/pci/lx6464es/lx_core.c, lines 75 
to 99). any idea, what is going wrong there?

thanks, tim