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drm/i915/gvt: return error code if dma map iova failed 

When doing dma map failed for a pfn, kvmgt should unpin the
pfn and return error code to device module driver

Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Cc: xinda.zhao@intel.com
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Chuanxiao Dong 2017-02-14 17:15:54 +08:00 committed by Zhenyu Wang
parent bc6a1c8579
commit 4a0b3444da
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/i915/gvt/kvmgt.c
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@ -1402,8 +1402,11 @@ static unsigned long kvmgt_gfn_to_pfn(unsigned long handle, unsigned long gfn)
}
/* transfer to host iova for GFX to use DMA */
rc = gvt_dma_map_iova(info->vgpu, pfn, &iova);
if (rc)
if (rc) {
gvt_err("gvt_dma_map_iova failed for gfn: 0x%lx\n", gfn);
vfio_unpin_pages(dev, &gfn, 1);
return INTEL_GVT_INVALID_ADDR;
}
gvt_cache_add(info->vgpu, gfn, iova);
return iova;