[PATCH] HID: intel-thc-hid: intel-quicki2c: fix autosuspend cleanup during teardown

[Guangshuo Li]

quicki2c_probe() calls pm_runtime_use_autosuspend(), but
quicki2c_remove() does not call the matching
pm_runtime_dont_use_autosuspend() during teardown.

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 calling pm_runtime_dont_use_autosuspend()
during teardown, this reference is not dropped.

The documentation for pm_runtime_use_autosuspend() also notes that it
is important to undo it with pm_runtime_dont_use_autosuspend() at
driver exit time, unless runtime PM was initially enabled with
devm_pm_runtime_enable().

Add the missing pm_runtime_dont_use_autosuspend() call to the driver
remove path.

This issue was found by manual code inspection.

Fixes: 5f420e8215c6 ("HID: intel-thc-hid: intel-quicki2c: Add PM implementation")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Guangshuo Li <lgs201920130244@xxxxxxxxx>
---
 drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c b/drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c
index 46d3e9a01999..4126c2408d98 100644
--- a/drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c
+++ b/drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c
@@ -774,6 +774,7 @@ static void quicki2c_remove(struct pci_dev *pdev)
 	quicki2c_hid_remove(qcdev);
 	quicki2c_dma_deinit(qcdev);
 
+	pm_runtime_dont_use_autosuspend(qcdev->dev);
 	pm_runtime_get_noresume(qcdev->dev);
 
 	quicki2c_dev_deinit(qcdev);
-- 
2.43.0