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drm/i915/gvt: add write vreg in MMIO DMA_CTRL handler 

Missing write_vreg in DMA_CTRL write handler would make obsolete
value return when read vreg.

v2: get data from vreg after updating it.

Signed-off-by: Ping Gao <ping.a.gao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Ping Gao 2016-10-27 14:46:40 +08:00 committed by Zhenyu Wang
parent 337d066527
commit 5f399f1158
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/i915/gvt/handlers.c
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@ -1158,7 +1158,10 @@ static int fpga_dbg_mmio_write(struct intel_vgpu *vgpu,
static int dma_ctrl_write(struct intel_vgpu *vgpu, unsigned int offset,
void *p_data, unsigned int bytes)
{
u32 mode = *(u32 *)p_data;
u32 mode;
write_vreg(vgpu, offset, p_data, bytes);
mode = vgpu_vreg(vgpu, offset);
if (GFX_MODE_BIT_SET_IN_MASK(mode, START_DMA)) {
WARN_ONCE(1, "VM(%d): iGVT-g doesn't supporte GuC\n",