drm/i915/gvt: print correct value for untracked mmio

In function intel_vgpu_emulate_mmio_read, the untracked mmio register is
dumped through kernel log, but the register value is not correct. This
patch fixes this issue.

V2: fix the fromat warning from checkpatch.pl.

Signed-off-by: Pei Zhang <pei.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/gvt/mmio.c b/drivers/gpu/drm/i915/gvt/mmio.c
index 09c9450..e607013 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/mmio.c
+++ b/drivers/gpu/drm/i915/gvt/mmio.c
@@ -125,25 +125,12 @@ int intel_vgpu_emulate_mmio_read(struct intel_vgpu *vgpu, uint64_t pa,
        if (WARN_ON(!reg_is_mmio(gvt, offset + bytes - 1)))
                goto err;
 
-       mmio = intel_gvt_find_mmio_info(gvt, rounddown(offset, 4));
-       if (!mmio && !vgpu->mmio.disable_warn_untrack) {
-               gvt_err("vgpu%d: read untracked MMIO %x len %d val %x\n",
-                               vgpu->id, offset, bytes, *(u32 *)p_data);
-
-               if (offset == 0x206c) {
-                       gvt_err("------------------------------------------\n");
-                       gvt_err("vgpu%d: likely triggers a gfx reset\n",
-                       vgpu->id);
-                       gvt_err("------------------------------------------\n");
-                       vgpu->mmio.disable_warn_untrack = true;
-               }
-       }
-
        if (!intel_gvt_mmio_is_unalign(gvt, offset)) {
                if (WARN_ON(!IS_ALIGNED(offset, bytes)))
                        goto err;
        }
 
+       mmio = intel_gvt_find_mmio_info(gvt, rounddown(offset, 4));
        if (mmio) {
                if (!intel_gvt_mmio_is_unalign(gvt, mmio->offset)) {
                        if (WARN_ON(offset + bytes > mmio->offset + mmio->size))
@@ -152,9 +139,23 @@ int intel_vgpu_emulate_mmio_read(struct intel_vgpu *vgpu, uint64_t pa,
                                goto err;
                }
                ret = mmio->read(vgpu, offset, p_data, bytes);
-       } else
+       } else {
                ret = intel_vgpu_default_mmio_read(vgpu, offset, p_data, bytes);
 
+               if (!vgpu->mmio.disable_warn_untrack) {
+                       gvt_err("vgpu%d: read untracked MMIO %x(%dB) val %x\n",
+                               vgpu->id, offset, bytes, *(u32 *)p_data);
+
+                       if (offset == 0x206c) {
+                               gvt_err("------------------------------------------\n");
+                               gvt_err("vgpu%d: likely triggers a gfx reset\n",
+                                       vgpu->id);
+                               gvt_err("------------------------------------------\n");
+                               vgpu->mmio.disable_warn_untrack = true;
+                       }
+               }
+       }
+
        if (ret)
                goto err;