Re: [PATCH] 2.6.9-rc3 fix warnings in sound/drivers/opl3/opl3_lib.c

[viro@parcelfarce.linux.theplanet.co.uk]

On Thu, Sep 30, 2004 at 04:25:44PM +0100, viro@parcelfarce.linux.theplanet.co.uk wrote:
> On Thu, Sep 30, 2004 at 02:28:53PM +0200, Borislav Petkov wrote:
> > Hi there,
> >    I get these warnings while compiling 2.6.9-rc3:
> >    sound/drivers/opl3/opl3_lib.c: In function `snd_opl3_cs4281_command':   
> >    sound/drivers/opl3/opl3_lib.c:101: warning: passing arg 2 of `writel'  makes pointer from integer without a cast   
> >    sound/drivers/opl3/opl3_lib.c:104: warning: passing arg 2 of `writel'  makes pointer from integer without a cast
> >    
> >    Hope this fix is correct.
> 
> It looks very odd.  At the very least we don't want to overload the
> fields in question (->r_port and ->l_port) that way.

*Yuck*

ALSA code, as pretty as ever.  No, that's not a fix; it's only shutting the
rightfully complaining compiler up.

What happens there is a dirty kludge created for the benefit of a single
driver (sound/pci/cs4281.c).  Said driver has a bunch of registers
memory-mapped, while its relatives use port IO instead.  Driver does
(correctly) ioremap(); then it overloads the arguments of snd_opl3_create()
normally used for port numbers and shoves *address obtained from ioremap
and divided by 4* in them.

Sigh...  At the very least that kind of abuse should stop.  FWIW, I would
suggest having cs4281.c set the ->command() directly and killing that crap
with ->l_port/->r_port overloading.