From: Johan Hovold <johan+linaro@xxxxxxxxxx>
commit 0d997f95b70f98987ae031a89677c13e0e223670 upstream.
A recent commit moved enabling of runtime PM to GPU load time (first
open()) but failed to update the error paths so that runtime PM is
disabled if initialisation of the GPU fails. This would trigger a
warning about the unbalanced disable count on the next open() attempt.
Note that pm_runtime_put_noidle() is sufficient to balance the usage
count when pm_runtime_put_sync() fails (and is chosen over
pm_runtime_resume_and_get() for consistency reasons).
Fixes: 4b18299b3365 ("drm/msm/adreno: Defer enabling runpm until hw_init()")
Cc: stable@xxxxxxxxxxxxxxx # 6.0
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/524971/
Link: https://lore.kernel.org/r/20230303164807.13124-3-johan+linaro@xxxxxxxxxx
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/adreno/adreno_device.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -440,20 +440,21 @@ struct msm_gpu *adreno_load_gpu(struct d
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0) {
- pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
DRM_DEV_ERROR(dev->dev, "Couldn't power up the GPU: %d\n", ret);
- return NULL;
+ goto err_disable_rpm;
}
mutex_lock(&gpu->lock);
ret = msm_gpu_hw_init(gpu);
mutex_unlock(&gpu->lock);
- pm_runtime_put_autosuspend(&pdev->dev);
if (ret) {
DRM_DEV_ERROR(dev->dev, "gpu hw init failed: %d\n", ret);
- return NULL;
+ goto err_put_rpm;
}
+ pm_runtime_put_autosuspend(&pdev->dev);
+
#ifdef CONFIG_DEBUG_FS
if (gpu->funcs->debugfs_init) {
gpu->funcs->debugfs_init(gpu, dev->primary);
@@ -462,6 +463,13 @@ struct msm_gpu *adreno_load_gpu(struct d
#endif
return gpu;
+
+err_put_rpm:
+ pm_runtime_put_sync(&pdev->dev);
+err_disable_rpm:
+ pm_runtime_disable(&pdev->dev);
+
+ return NULL;
}
static int find_chipid(struct device *dev, struct adreno_rev *rev)
