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([2001:250:5800:1000::f280]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3925fd95794sm4856341a91.7.2026.08.07.22.33.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Aug 2026 22:33:14 -0700 (PDT) From: Guangshuo Li To: Marcel Holtmann , Luiz Augusto von Dentz , Loic Poulain , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Guangshuo Li , stable@vger.kernel.org Subject: [PATCH] Bluetooth: hci_intel: fix usage_count leak when autosuspend_delay is negative Date: Sat, 8 Aug 2026 13:30:57 +0800 Message-ID: <20260808053057.2566366-1-lgs201920130244@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- 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 po= wered) devm_free_irq(&idev->pdev->dev, idev->irq, idev); device_wakeup_disable(&idev->pdev->dev); =20 + pm_runtime_dont_use_autosuspend(&idev->pdev->dev); pm_runtime_disable(&idev->pdev->dev); } } --=20 2.43.0