[ Upstream commit 19b5e6659eaf537ebeac90ae30c7df0296fe5ab9 ]

Existing code is causing a race condition where dirt_needed value is already set by the host and gets overwritten with default value. Remove this default setting of dirt_needed, to avoid overwriting the value received in the channel callback set by vmbus_open. Removing this setting also means the default value for dirt_needed is changed to false as it's allocated by kzalloc which is similar to legacy hyperv_fb driver.

Signed-off-by: Saurabh Sengar ssengar@linux.microsoft.com Reviewed-by: Michael Kelley mikelley@microsoft.com Reviewed-by: Dexuan Cui decui@microsoft.com --- drivers/gpu/drm/hyperv/hyperv_drm_drv.c | 2 -- 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_drv.c b/drivers/gpu/drm/hyperv/hyperv_drm_drv.c index 00e53de4812b..584d3a73db96 100644 --- a/drivers/gpu/drm/hyperv/hyperv_drm_drv.c +++ b/drivers/gpu/drm/hyperv/hyperv_drm_drv.c @@ -198,8 +198,6 @@ static int hyperv_vmbus_probe(struct hv_device *hdev, if (ret) drm_warn(dev, "Failed to update vram location.\n");

- hv->dirt_needed = true; - ret = hyperv_mode_config_init(hv); if (ret) goto err_vmbus_close;