[PATCH] i2c: nvidia-gpu: fix autosuspend cleanup

[PATCH] i2c: nvidia-gpu: fix autosuspend cleanup

[Guangshuo Li]

gpu_i2c_probe() calls pm_runtime_use_autosuspend(), but the remove
path does not call the matching pm_runtime_dont_use_autosuspend().

If the autosuspend delay is set to a negative value while autosuspend
is enabled, the runtime PM core increments usage_count to prevent
runtime suspend. Without undoing the autosuspend setting during
teardown, this reference is not dropped and usage_count remains
unbalanced.

Call pm_runtime_dont_use_autosuspend() during driver removal to
properly undo the autosuspend setting.

This issue was found by manual code inspection.

Fixes: d4a4f927e4dd ("i2c: nvidia-gpu: add runtime pm support")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
---
 drivers/i2c/busses/i2c-nvidia-gpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/busses/i2c-nvidia-gpu.c b/drivers/i2c/busses/i2c-nvidia-gpu.c
index 14c059b03945..9dbe1fe22412 100644
--- a/drivers/i2c/busses/i2c-nvidia-gpu.c
+++ b/drivers/i2c/busses/i2c-nvidia-gpu.c
@@ -334,6 +334,7 @@ static void gpu_i2c_remove(struct pci_dev *pdev)
 	struct gpu_i2c_dev *i2cd = pci_get_drvdata(pdev);
 
 	pm_runtime_get_noresume(i2cd->dev);
+	pm_runtime_dont_use_autosuspend(i2cd->dev);
 	i2c_del_adapter(&i2cd->adapter);
 	pci_free_irq_vectors(pdev);
 }
-- 
2.43.0

Re: [PATCH] i2c: nvidia-gpu: fix autosuspend cleanup

[Krzysztof Kozlowski]

On 12/08/2026 11:23, Guangshuo Li wrote:
> gpu_i2c_probe() calls pm_runtime_use_autosuspend(), but the remove
> path does not call the matching pm_runtime_dont_use_autosuspend().
> 
> If the autosuspend delay is set to a negative value while autosuspend
> is enabled, the runtime PM core increments usage_count to prevent
> runtime suspend. Without undoing the autosuspend setting during
> teardown, this reference is not dropped and usage_count remains
> unbalanced.
> 
> Call pm_runtime_dont_use_autosuspend() during driver removal to
> properly undo the autosuspend setting.
> 
> This issue was found by manual code inspection.
> 
> Fixes: d4a4f927e4dd ("i2c: nvidia-gpu: add runtime pm support")
> Cc: stable@vger.kernel.org
> Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>

You sent vast amount of patches, all separate, making it very difficult
to track and respond in efficient way. Do not do that.

Group your work per subsystem.

You were asked to clarify and respond to incorrect fixes statement. I do
not see how you clarified and responded at all.

Best regards,
Krzysztof