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iommu/arm-smmu-qcom: record reason for deferring probe

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To avoid deferring probe smmu driver silently, record reason for it.
It can be checked through ../debugfs/devices_deferred as well:
/sys/kernel/debug# cat devices_deferred
15000000.iommu  arm-smmu: qcom_scm not ready

Signed-off-by: Zhenhua Huang <quic_zhenhuah@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/1719910870-25079-1-git-send-email-quic_zhenhuah@quicinc.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Zhenhua Huang
2024-07-02 17:01:10 +08:00
committed by Will Deacon
parent d525b0af0c
commit 9796cf9b3e
1 changed files with 2 additions and 1 deletions
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drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+2 -1
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@@ -469,7 +469,8 @@ static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
/* Check to make sure qcom_scm has finished probing */
if (!qcom_scm_is_available())
return ERR_PTR(-EPROBE_DEFER);
return ERR_PTR(dev_err_probe(smmu->dev, -EPROBE_DEFER,
"qcom_scm not ready\n"));
qsmmu = devm_krealloc(smmu->dev, smmu, sizeof(*qsmmu), GFP_KERNEL);
if (!qsmmu)