On 08/11/2019 16:17, John Garry wrote:
On 08/11/2019 15:16, Will Deacon wrote:
+MODULE_DEVICE_TABLE(of, arm_smmu_of_match);

Hi Will,

  static struct platform_driver arm_smmu_driver = {
      .driver    = {
          .name        = "arm-smmu-v3",
          .of_match_table    = of_match_ptr(arm_smmu_of_match),
-        .suppress_bind_attrs = true,

Does this mean that we can now manually unbind this driver from the SMMU device?

Seems dangerous. Here's what happens for me:

root@ubuntu:/sys# cd ./bus/platform/drivers/arm-smmu-v3
ind @ubuntu:/sys/bus/platform/drivers/arm-smmu-v3# echo arm-smmu-v3.0.auto > unbind
[   77.580351] hisi_sas_v2_hw HISI0162:01: CQE_AXI_W_ERR (0x800) found!
ho [   78.635473] platform arm-smmu-v3.0.auto: CMD_SYNC timeout at 0x00000146 [hwprod 0x00000146, hwcons 0x00000000]

      },
      .probe    = arm_smmu_device_probe,
+    .remove    = arm_smmu_device_remove,
      .shutdown = arm_smmu_device_shutdown,
  };
-builtin_platform_driver(arm_smmu_driver);
+module_platform_driver(arm_smmu_driver);
+

BTW, it now looks like it was your v1 series I was testing there, on your branch iommu/module. It would be helpful to update for ease of testing.

Thanks,
John

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