[PATCH v6 6/9] KVM: arm64: Simplify argument passing to vgic_uaccess_[read|write]

[Eric Auger]

vgic_uaccess() takes a struct vgic_io_device argument, converts it
to a struct kvm_io_device and passes it to the read/write accessor
functions, which convert it back to a struct vgic_io_device.
Avoid the indirection by passing the struct vgic_io_device argument
directly to vgic_uaccess_{read,write}.

Signed-off-by: Eric Auger <eric.au...@redhat.com>

---

v1 -> v2:
- reworded the commit message as suggested by Alexandru
---
 arch/arm64/kvm/vgic/vgic-mmio.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/kvm/vgic/vgic-mmio.c b/arch/arm64/kvm/vgic/vgic-mmio.c
index b2d73fc0d1ef..48c6067fc5ec 100644
--- a/arch/arm64/kvm/vgic/vgic-mmio.c
+++ b/arch/arm64/kvm/vgic/vgic-mmio.c
@@ -938,10 +938,9 @@ vgic_get_mmio_region(struct kvm_vcpu *vcpu, struct 
vgic_io_device *iodev,
        return region;
 }
 
-static int vgic_uaccess_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
+static int vgic_uaccess_read(struct kvm_vcpu *vcpu, struct vgic_io_device 
*iodev,
                             gpa_t addr, u32 *val)
 {
-       struct vgic_io_device *iodev = kvm_to_vgic_iodev(dev);
        const struct vgic_register_region *region;
        struct kvm_vcpu *r_vcpu;
 
@@ -960,10 +959,9 @@ static int vgic_uaccess_read(struct kvm_vcpu *vcpu, struct 
kvm_io_device *dev,
        return 0;
 }
 
-static int vgic_uaccess_write(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
+static int vgic_uaccess_write(struct kvm_vcpu *vcpu, struct vgic_io_device 
*iodev,
                              gpa_t addr, const u32 *val)
 {
-       struct vgic_io_device *iodev = kvm_to_vgic_iodev(dev);
        const struct vgic_register_region *region;
        struct kvm_vcpu *r_vcpu;
 
@@ -986,9 +984,9 @@ int vgic_uaccess(struct kvm_vcpu *vcpu, struct 
vgic_io_device *dev,
                 bool is_write, int offset, u32 *val)
 {
        if (is_write)
-               return vgic_uaccess_write(vcpu, &dev->dev, offset, val);
+               return vgic_uaccess_write(vcpu, dev, offset, val);
        else
-               return vgic_uaccess_read(vcpu, &dev->dev, offset, val);
+               return vgic_uaccess_read(vcpu, dev, offset, val);
 }
 
 static int dispatch_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
-- 
2.26.3