[PATCH] Bluetooth: hci_intel: fix usage_count leak when autosuspend_delay is negative

[PATCH] Bluetooth: hci_intel: fix usage_count leak when autosuspend_delay is negative

[Guangshuo Li]

intel_set_power() calls pm_runtime_use_autosuspend() when powering on
the device, but the power-off path does not call the matching
pm_runtime_dont_use_autosuspend() before disabling runtime PM.

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 and usage_count remains
unbalanced.

Add the missing pm_runtime_dont_use_autosuspend() call before disabling
runtime PM.

This issue was found by manual code inspection.

Fixes: 74cdad37cd24 ("Bluetooth: hci_intel: Add runtime PM support")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
---
 drivers/bluetooth/hci_intel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c
index c31105b91e47..1919547ff2a1 100644
--- a/drivers/bluetooth/hci_intel.c
+++ b/drivers/bluetooth/hci_intel.c
@@ -345,6 +345,7 @@ static int intel_set_power(struct hci_uart *hu, bool powered)
 			devm_free_irq(&idev->pdev->dev, idev->irq, idev);
 			device_wakeup_disable(&idev->pdev->dev);
 
+			pm_runtime_dont_use_autosuspend(&idev->pdev->dev);
 			pm_runtime_disable(&idev->pdev->dev);
 		}
 	}
-- 
2.43.0

RE: Bluetooth: hci_intel: fix usage_count leak when autosuspend_delay is negative

[bluez.test.bot]

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This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=1142536

---Test result---

Test Summary:
CheckPatch                    PASS      0.55 seconds
VerifyFixes                   PASS      0.07 seconds
VerifySignedoff               PASS      0.38 seconds
GitLint                       PASS      0.20 seconds
SubjectPrefix                 PASS      0.06 seconds
BuildKernel                   PASS      27.76 seconds
CheckAllWarning               PASS      30.64 seconds
CheckSparse                   PASS      28.99 seconds
BuildKernel32                 PASS      27.02 seconds
CheckKernelLLVM               SKIP      0.00 seconds
TestRunnerSetup               PASS      507.22 seconds
IncrementalBuild              PASS      25.80 seconds

Details
##############################
Test: CheckKernelLLVM - SKIP
Desc: Build kernel with LLVM + context analysis
Output:
Clang not found


https://github.com/bluez/bluetooth-next/pull/557

---
Regards,
Linux Bluetooth

Re: [PATCH] Bluetooth: hci_intel: fix usage_count leak when autosuspend_delay is negative

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Sat,  8 Aug 2026 13:30:57 +0800 you wrote:
> intel_set_power() calls pm_runtime_use_autosuspend() when powering on
> the device, but the power-off path does not call the matching
> pm_runtime_dont_use_autosuspend() before disabling runtime PM.
> 
> 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 and usage_count remains
> unbalanced.
> 
> [...]

Here is the summary with links:
  - Bluetooth: hci_intel: fix usage_count leak when autosuspend_delay is negative
    https://git.kernel.org/bluetooth/bluetooth-next/c/bc2791e60e08

You are awesome, thank you!
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