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Commit 73230ce4 authored by Mitchel Humpherys's avatar Mitchel Humpherys Committed by Patrick Daly
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iommu/arm-smmu: make a mismatch in CBs and CB interrupts non-fatal 



When running under a hypervisor, the number of context banks visible to
Linux could be different from what we see when running standalone.  This
is problematic since the context bank interrupts are hard-coded into the
DT configuration, and we'd like to share that configuration whether
we're running under a hypervisor or not.  Remove a warning when a
mismatch in the number of CBs and CB interrupts is detected and don't
return failure while probing.

Change-Id: I9271e4e04ecafe61f4bb12d1e1148cb2bcec2439
Signed-off-by: default avatarMitchel Humpherys <mitchelh@codeaurora.org>
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent a571f73d

drivers/iommu/arm-smmu.c

+4 −4
Original line number Diff line number Diff line
@@ -3469,10 +3469,10 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) 
	if (smmu->version == ARM_SMMU_V2 &&

	    smmu->num_context_banks != smmu->num_context_irqs) {

		dev_err(dev,

			"found only %d context interrupt(s) but %d required\n",

			smmu->num_context_irqs, smmu->num_context_banks);

		err = -ENODEV;

		goto out_put_masters;

			"found %d context interrupt(s) but have %d context banks. assuming %d context interrupts.\n",

			smmu->num_context_irqs, smmu->num_context_banks,

			smmu->num_context_banks);

		smmu->num_context_irqs = smmu->num_context_banks;

	}



	for (i = 0; i < smmu->num_global_irqs; ++i) {