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From:   Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
To:     <linux-kernel@vger.kernel.org>, <iommu@lists.linux.dev>
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        <alejandro.j.jimenez@oracle.com>, <boris.ostrovsky@oracle.com>,
        <jon.grimm@amd.com>, <santosh.shukla@amd.com>,
        <vasant.hegde@amd.com>, <kishon.vijayabraham@amd.com>,
        <jsnitsel@redhat.com>,
        Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Subject: [PATCH v3 2/5] iommu/amd: Remove the unused struct amd_ir_data.ref
Date:   Tue, 30 May 2023 10:11:34 -0400
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Since the amd_iommu_update_ga() has been switched to use the
modify_irte_ga() helper function to update the IRTE, the parameter
is no longer needed.

Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Suggested-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
---
 drivers/iommu/amd/amd_iommu_types.h |  1 -
 drivers/iommu/amd/iommu.c           | 17 +++++++----------
 2 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h
index 3d684190b4d5..a0ff1e852efc 100644
--- a/drivers/iommu/amd/amd_iommu_types.h
+++ b/drivers/iommu/amd/amd_iommu_types.h
@@ -993,7 +993,6 @@ struct amd_ir_data {
 	struct irq_2_irte irq_2_irte;
 	struct msi_msg msi_entry;
 	void *entry;    /* Pointer to union irte or struct irte_ga */
-	void *ref;      /* Pointer to the actual irte */
 
 	/**
 	 * Store information for activate/de-activate
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 4a3a7346ab21..0c4a2796bb0a 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2999,7 +2999,7 @@ static int alloc_irq_index(struct amd_iommu *iommu, u16 devid, int count,
 }
 
 static int modify_irte_ga(struct amd_iommu *iommu, u16 devid, int index,
-			  struct irte_ga *irte, struct amd_ir_data *data)
+			  struct irte_ga *irte)
 {
 	bool ret;
 	struct irq_remap_table *table;
@@ -3026,9 +3026,6 @@ static int modify_irte_ga(struct amd_iommu *iommu, u16 devid, int index,
 	 */
 	WARN_ON(!ret);
 
-	if (data)
-		data->ref = entry;
-
 	raw_spin_unlock_irqrestore(&table->lock, flags);
 
 	iommu_flush_irt(iommu, devid);
@@ -3117,7 +3114,7 @@ static void irte_ga_activate(struct amd_iommu *iommu, void *entry, u16 devid, u1
 	struct irte_ga *irte = (struct irte_ga *) entry;
 
 	irte->lo.fields_remap.valid = 1;
-	modify_irte_ga(iommu, devid, index, irte, NULL);
+	modify_irte_ga(iommu, devid, index, irte);
 }
 
 static void irte_deactivate(struct amd_iommu *iommu, void *entry, u16 devid, u16 index)
@@ -3133,7 +3130,7 @@ static void irte_ga_deactivate(struct amd_iommu *iommu, void *entry, u16 devid,
 	struct irte_ga *irte = (struct irte_ga *) entry;
 
 	irte->lo.fields_remap.valid = 0;
-	modify_irte_ga(iommu, devid, index, irte, NULL);
+	modify_irte_ga(iommu, devid, index, irte);
 }
 
 static void irte_set_affinity(struct amd_iommu *iommu, void *entry, u16 devid, u16 index,
@@ -3157,7 +3154,7 @@ static void irte_ga_set_affinity(struct amd_iommu *iommu, void *entry, u16 devid
 					APICID_TO_IRTE_DEST_LO(dest_apicid);
 		irte->hi.fields.destination =
 					APICID_TO_IRTE_DEST_HI(dest_apicid);
-		modify_irte_ga(iommu, devid, index, irte, NULL);
+		modify_irte_ga(iommu, devid, index, irte);
 	}
 }
 
@@ -3508,7 +3505,7 @@ int amd_iommu_activate_guest_mode(void *data)
 	entry->lo.fields_vapic.ga_tag      = ir_data->ga_tag;
 
 	return modify_irte_ga(ir_data->iommu, ir_data->irq_2_irte.devid,
-			      ir_data->irq_2_irte.index, entry, ir_data);
+			      ir_data->irq_2_irte.index, entry);
 }
 EXPORT_SYMBOL(amd_iommu_activate_guest_mode);
 
@@ -3538,7 +3535,7 @@ int amd_iommu_deactivate_guest_mode(void *data)
 				APICID_TO_IRTE_DEST_HI(cfg->dest_apicid);
 
 	return modify_irte_ga(ir_data->iommu, ir_data->irq_2_irte.devid,
-			      ir_data->irq_2_irte.index, entry, ir_data);
+			      ir_data->irq_2_irte.index, entry);
 }
 EXPORT_SYMBOL(amd_iommu_deactivate_guest_mode);
 
@@ -3719,7 +3716,7 @@ int amd_iommu_update_ga(int cpu, bool is_run, void *data)
 	entry->lo.fields_vapic.is_run = is_run;
 
 	return modify_irte_ga(ir_data->iommu, ir_data->irq_2_irte.devid,
-			      ir_data->irq_2_irte.index, entry, ir_data);
+			      ir_data->irq_2_irte.index, entry);
 }
 EXPORT_SYMBOL(amd_iommu_update_ga);
 #endif
-- 
2.31.1