RE: [PATCH] qede: fix CONFIG_INFINIBAND_QEDR=m build error

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-		if (cond)
+		if (IS_ENABLED(CONFIG_INFINIBAND_QEDR) && cond)
		qed_rdma_dpm_bar(p_hwfn, p_ptt);

Why not simply fix the qed_roce.h empty implementation?

Mainly for consistency: we have a couple of interfaces that are called from the
qed driver that are implemented in qed_roce.c. We can either use a 'static inline'
helper for all of them, or use if(IS_ENABLED()) everywhere. Since this was the
only function that had a helper and that helper was defined incorrectly, I went
with the second option.

Actually, that's not the case. I think with this exception, all the rest of the prototypes
in qed_roce.h aren't really needed, as those functions should only be accessed via
the qed_rdma_ops. I'll remove those later [or we can remove them as part of v2].

The genereal qed* preference is to have empty static-inline implementations
in case content is compiled-out [Look at iov for example].

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-#if IS_ENABLED(CONFIG_INFINIBAND_QEDR)
+	if (!IS_ENABLED(CONFIG_INFINIBAND_QEDR))
+		return 0;
+
 	num_l2_queues = 0;
 	for_each_hwfn(cdev, i)
 		num_l2_queues += FEAT_NUM(&cdev->hwfns[i],

QED_PF_L2_QUE); @@

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-738,7 +736,6 @@ static int qed_slowpath_setup_int(struct qed_dev
*cdev,
 	DP_VERBOSE(cdev, QED_MSG_RDMA, "roce_msix_cnt=%d
roce_msix_base=%d\n",
 		   cdev->int_params.rdma_msix_cnt,
 		   cdev->int_params.rdma_msix_base); -#endif

While I don't mind, you could have argued is that we're not removing
enough, not too much.
I.e., perhaps the rdma_msix_* fields should also have been ifdef-ed
instead. [in which case this solution would not have worked]

That would add even more #ifdefs though.

I agree. Although I'm never clear on the guidelines for the tradeoff - 
How much memory/code is considered too much so that you'd have
To ifdef code out instead of 'wasting'?
[I obviously don't claim 64 bytes of memory hit that threshold]
 
BTW, are you interested in doing a v2 for this? Or would you prefer
if we'd pick it up from here?

Thanks,
Yuval