linux-kernel - Re: [PATCH] iw_cxgb4: add INFINIBAND_ADDR

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Date:   Wed, 30 May 2018 16:25:20 -0600
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Steve Wise <swise@...ngridcomputing.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Steve Wise <swise@...lsio.com>,
        Doug Ledford <dledford@...hat.com>,
        Yuval Shaia <yuval.shaia@...cle.com>,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iw_cxgb4: add INFINIBAND_ADDR_TRANS dependency

On Wed, May 30, 2018 at 05:10:35PM -0500, Steve Wise wrote:
> 
> 
> On 5/30/2018 5:04 PM, Jason Gunthorpe wrote:
> > On Wed, May 30, 2018 at 11:58:18PM +0200, Arnd Bergmann wrote:
> >> The newly added fill_res_ep_entry function fails to link if
> >> CONFIG_INFINIBAND_ADDR_TRANS is not set:
> >>
> >> drivers/infiniband/hw/cxgb4/restrack.o: In function `fill_res_ep_entry':
> >> restrack.c:(.text+0x3cc): undefined reference to `rdma_res_to_id'
> >> restrack.c:(.text+0x3d0): undefined reference to `rdma_iw_cm_id'
> >>
> >> This adds a Kconfig dependency for the driver.
> >>
> >> Fixes: 116aeb887371 ("iw_cxgb4: provide detailed provider-specific CM_ID information")
> >> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> >>  drivers/infiniband/hw/cxgb4/Kconfig | 1 +
> >>  1 file changed, 1 insertion(+)
> > Oh, I think we need to solve this with maybe a header fill null stub
> > instead..
> >
> > We don't want to disable drivers just because a user interface is
> > disabled.
> >
> 
> Why does CONFIG_INFINIBAND_ADDR_TRANS disable building rdma_cm.ko? That
> is not correct.

That seems like a reasonable thing to do..

But why does it break the compile? Those functions are in cma.c...

Jason