From: Sean Paul seanpaul@chromium.org
[ Upstream commit 4368a1539c6b41ac3cddc06f5a5117952998804c ]
add_display_components() calls of_platform_populate, and we depopluate on pdev remove, but not when probe fails. So if we get a probe deferral in one of the components, we won't depopulate the platform. This causes the core to keep references to devices which should be destroyed, which causes issues when those same devices try to re-initialize on the next probe attempt.
I think this is the reason we had issues with the gmu's device-managed resources on deferral (worked around in commit 94e3a17f33a5).
Reviewed-by: Rob Clark robdclark@chromium.org Signed-off-by: Sean Paul seanpaul@chromium.org Link: https://patchwork.freedesktop.org/patch/msgid/20190617201301.133275-3-sean@p... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/msm/msm_drv.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index f38d7367bd3b..4a0fe8a25ad7 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -1306,16 +1306,24 @@ static int msm_pdev_probe(struct platform_device *pdev)
ret = add_gpu_components(&pdev->dev, &match); if (ret) - return ret; + goto fail;
/* on all devices that I am aware of, iommu's which can map * any address the cpu can see are used: */ ret = dma_set_mask_and_coherent(&pdev->dev, ~0); if (ret) - return ret; + goto fail; + + ret = component_master_add_with_match(&pdev->dev, &msm_drm_ops, match); + if (ret) + goto fail;
- return component_master_add_with_match(&pdev->dev, &msm_drm_ops, match); + return 0; + +fail: + of_platform_depopulate(&pdev->dev); + return ret; }
static int msm_pdev_remove(struct platform_device *pdev)