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([101.76.249.46]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2d16c4e1182sm18019325ad.72.2026.08.08.04.06.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 08 Aug 2026 04:06:55 -0700 (PDT) From: Guangshuo Li To: Vinod Koul , Frank Li , Konrad Dybcio , Bartosz Golaszewski , Bjorn Andersson , Kees Cook , Stephan Gerhold , Guangshuo Li , Andy Shevchenko , Kuldeep Singh , Pramod Gurav , linux-arm-msm@vger.kernel.org, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Subject: [PATCH] dmaengine: qcom-bam-dma: fix autosuspend cleanup during removal Date: Sat, 8 Aug 2026 19:06:42 +0800 Message-ID: <20260808110642.2770355-1-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" bam_dma_probe() calls pm_runtime_use_autosuspend(), but bam_dma_remove() does not call the matching pm_runtime_dont_use_autosuspend() when removing the device. 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 forcing the device into runtime suspend during removal. This issue was found by manual code inspection. Fixes: 7d2545599f5b ("dmaengine: qcom-bam-dma: Add pm_runtime support") Cc: stable@vger.kernel.org Signed-off-by: Guangshuo Li Reviewed-by: Bartosz Golaszewski --- drivers/dma/qcom/bam_dma.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c index 1bb26af0405f..05a3b1f9e0c2 100644 --- a/drivers/dma/qcom/bam_dma.c +++ b/drivers/dma/qcom/bam_dma.c @@ -1401,6 +1401,7 @@ static void bam_dma_remove(struct platform_device *pd= ev) struct bam_device *bdev =3D platform_get_drvdata(pdev); u32 i; =20 + pm_runtime_dont_use_autosuspend(&pdev->dev); pm_runtime_force_suspend(&pdev->dev); =20 of_dma_controller_free(pdev->dev.of_node); --=20 2.43.0