Re: build issue #503 for v2.6.26-rc2-433-gf26a398 : undefined reference to `request_firmware'

[James Bottomley <James.Bottomley@HansenPartnership.com>]

On Fri, 2008-05-23 at 10:54 -0700, Randy Dunlap wrote:
> On Thu, 22 May 2008 11:52:24 +0100 James Bottomley wrote:
> 
> > On Sat, 2008-05-17 at 17:17 +0300, Adrian Bunk wrote:
> > > On Sat, May 17, 2008 at 11:04:31AM +0100, James Bottomley wrote:
> > > > On Fri, 2008-05-16 at 19:06 +0200, Toralf Förster wrote:
> > > > > Hello,
> > > > > 
> > > > > the build (.config attached) failed, make ends with :
> > > > > ...
> > > > >   UPD     include/linux/compile.h
> > > > >   CC      init/version.o
> > > > >   LD      init/built-in.o
> > > > >   LD      vmlinux
> > > > > drivers/built-in.o: In function `sas_request_addr':
> > > > > (.text+0x33bab): undefined reference to `request_firmware'
> > > > > drivers/built-in.o: In function `sas_request_addr':
> > > > > (.text+0x33c3f): undefined reference to `release_firmware'
> > > > > make: *** [vmlinux] Error 1
> > > > 
> > > > There's a slight fault in the stub logic.  It fails for FW_LOADER=m and
> > > > the user =y.
> > > > 
> > > > This should fix it.
> > > 
> > > An interesting question is whether we actually want to have the stub at 
> > > all - the compile errors catched cases where someone forgot to select 
> > > FW_LOADER at compile time instead of turning them into possible runtime 
> > > problems as will happen after your patch.
> > 
> > Well, the original intent of the stubs was to have the loader nop if it
> > wasn't available.  There was simply one case forgotten (the fact that a
> > modular loader isn't usable from built in components).
> > 
> > > Are there any serious use cases where SCSI_SAS_LIBSAS is used in very 
> > > space limited environments and without any other drivers that select 
> > > FW_LOADER in the kernel?
> > 
> > Probably in the future, certainly on embedded OSs used for storage
> > devices.  Given the convergence of SAS/SATA chips, it's possible for
> > other handhelds, but I'm not convinced of that.
> 
> Has there been any resolution to this build issue?
> 
> Do we know what we want?  then maybe a patch can be done...

As long as the patch works, that's what I propose.

James


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