iommu/vt-d: Remove unused dmar_msi_read

dmar_msi_read() has been unused since 2022 in
commit cf8e8658100d ("arch: Remove Itanium (IA-64) architecture")

Remove it.

(dmar_msi_write still exists and is used once).

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://lore.kernel.org/r/20241022002702.302728-1-linux@treblig.org
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index e16c2b1d7633bdbce6671a30f7f74cbeaf540f8b..9f424acf474e9400ed91fa3aaa1f4b2cb498922b 100644 (file)
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -1895,19 +1895,6 @@ void dmar_msi_write(int irq, struct msi_msg *msg)
        raw_spin_unlock_irqrestore(&iommu->register_lock, flag);
 }
 
-void dmar_msi_read(int irq, struct msi_msg *msg)
-{
-       struct intel_iommu *iommu = irq_get_handler_data(irq);
-       int reg = dmar_msi_reg(iommu, irq);
-       unsigned long flag;
-
-       raw_spin_lock_irqsave(&iommu->register_lock, flag);
-       msg->data = readl(iommu->reg + reg + 4);
-       msg->address_lo = readl(iommu->reg + reg + 8);
-       msg->address_hi = readl(iommu->reg + reg + 12);
-       raw_spin_unlock_irqrestore(&iommu->register_lock, flag);
-}
-
 static int dmar_fault_do_one(struct intel_iommu *iommu, int type,
                u8 fault_reason, u32 pasid, u16 source_id,
                unsigned long long addr)

diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 499bb2c634832311c4edfe7441baa0fa25f2c00d..692b2b4457618486ee0a69e29c4b1289290cd9f2 100644 (file)
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -292,7 +292,6 @@ static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src)
 struct irq_data;
 extern void dmar_msi_unmask(struct irq_data *data);
 extern void dmar_msi_mask(struct irq_data *data);
-extern void dmar_msi_read(int irq, struct msi_msg *msg);
 extern void dmar_msi_write(int irq, struct msi_msg *msg);
 extern int dmar_set_interrupt(struct intel_iommu *iommu);
 extern irqreturn_t dmar_fault(int irq, void *dev_id);