drm/i915/gvt: set default value to 0 for unhandled mmio regs

for a handled mmio reg,  its default value is read from hardware, while
for an unhandled mmio regs,  its default value would be random if not
explicitly set to 0

Signed-off-by: Zhao Yan <yan.y.zhao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/gvt/firmware.c b/drivers/gpu/drm/i915/gvt/firmware.c
index 1cb29b2d7dc638bd701b4ec16eec9edc8fea1133..933a7c211a1c29ab77357119e37b0de2bb3dd521 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/firmware.c
+++ b/drivers/gpu/drm/i915/gvt/firmware.c
@@ -80,7 +80,7 @@ static int expose_firmware_sysfs(struct intel_gvt *gvt)
        int ret;
 
        size = sizeof(*h) + info->mmio_size + info->cfg_space_size - 1;
-       firmware = vmalloc(size);
+       firmware = vzalloc(size);
        if (!firmware)
                return -ENOMEM;