[PATCH v3 3/5] iommu/amd: Split probe error paths to preserve IRQ remapping

[Pranjal Shrivastava <praan@google.com>]

Split the amd_iommu_probe_device() error paths into err_deinit and
out_err. Proper init failures continue to call iommu_disable_device_dma()
while configuration failures (like PD_MODE_NONE or ATS mismatches) skip
it to preserve the rlookup_table entry required for IRQ remapping.

Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Reported-by: sashiko-bot@kernel.org
Closes: https://lore.kernel.org/all/20260529153216.2AD1E1F00899@smtp.kernel.org/
Suggested-by: Ankit Soni <ankit.soni@amd.com>
Signed-off-by: Pranjal Shrivastava <praan@google.com>
---
 drivers/iommu/amd/iommu.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 8e382317709d..ed336bca1a2e 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2540,8 +2540,7 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev)
 		ret = PTR_ERR(dev_data);
 		dev_err(dev, "Failed to initialize - trying to proceed anyway\n");
 		iommu_dev = ERR_PTR(ret);
-		iommu_disable_device(iommu, dev);
-		goto out_err;
+		goto err_deinit;
 	}
 
 	iommu_init_device_caps(dev_data, dev, iommu);
@@ -2559,6 +2558,10 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev)
 		goto out_err;
 	}
 
+	return iommu_dev;
+
+err_deinit:
+	iommu_disable_device(iommu, dev);
 out_err:
 	return iommu_dev;
 }
-- 
2.55.0.766.g2966f0265a-goog