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Currently, mhi_sync_power_up() waits for this entire process to complete, blocking other driver probes and delaying system boot. Switch to mhi_async_power_up() so probe can return immediately while MHI initialization continues in the background. This eliminates lengthy boot delays and allows other drivers to probe in parallel, improving overall system boot performance. Fixes: 5571519009d0 ("bus: mhi: host: pci_generic: Add SDX75 based modem su= pport") Cc: stable@vger.kernel.org Signed-off-by: Qiang Yu --- drivers/bus/mhi/host/pci_generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_= generic.c index 425362037830ea9ef30acab748b07f04e47f3d90..0395a8ea52b0e874209ca56cd20= ed04419038cdb 100644 --- a/drivers/bus/mhi/host/pci_generic.c +++ b/drivers/bus/mhi/host/pci_generic.c @@ -1405,7 +1405,7 @@ static int mhi_pci_probe(struct pci_dev *pdev, const = struct pci_device_id *id) goto err_unregister; } =20 - err =3D mhi_sync_power_up(mhi_cntrl); + err =3D mhi_async_power_up(mhi_cntrl); if (err) { dev_err(&pdev->dev, "failed to power up MHI controller\n"); goto err_unprepare; --=20 2.34.1 From nobody Thu Apr 16 02:01:54 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F0734388E6F for ; 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5614622812f47-464bb604f5esm9288908b6e.18.2026.03.03.01.02.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Mar 2026 01:02:24 -0800 (PST) From: Qiang Yu Date: Tue, 03 Mar 2026 01:02:14 -0800 Subject: [PATCH v2 2/2] bus: mhi: host: pci_generic: Add pm_runtime_forbid() in remove callback Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260303-b4-async_power_on-v2-2-d3db81eb457d@oss.qualcomm.com> References: <20260303-b4-async_power_on-v2-0-d3db81eb457d@oss.qualcomm.com> In-Reply-To: <20260303-b4-async_power_on-v2-0-d3db81eb457d@oss.qualcomm.com> To: Manivannan Sadhasivam , Qiang Yu , Hemant Kumar , Bhaumik Bhatt , Loic Poulain Cc: mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Qiang Yu X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1772528541; l=899; i=qiang.yu@oss.qualcomm.com; s=20250513; h=from:subject:message-id; bh=2f6yMK46tPJaTveXsb0Gf1R1SLcm5dpehHbEx9p98Vg=; b=ZTtVRJGYucS8HZEcniSuF0NvGdpFa9q7fcuuyWNKHjRiDNH1Q2QefDCtzZaUm39NQRWr/12QC 6qark6kI3cACWaCs66a+AH05UiR5rEUG5FVMDgOFokxv+IQQnd8w/BK X-Developer-Key: i=qiang.yu@oss.qualcomm.com; a=ed25519; pk=Rr94t+fykoieF1ngg/bXxEfr5KoQxeXPtYxM8fBQTAI= X-Proofpoint-ORIG-GUID: kqeaON2iY5KC8kI8d9ty5D7NbP6LKQbX X-Authority-Analysis: v=2.4 cv=dfmNHHXe c=1 sm=1 tr=0 ts=69a6a3a1 cx=c_pps a=yymyAM/LQ7lj/HqAiIiKTw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=EUspDBNiAAAA:8 a=5YqorbGh3H_VX0Y9zHsA:9 a=QEXdDO2ut3YA:10 a=efpaJB4zofY2dbm2aIRb:22 X-Proofpoint-GUID: kqeaON2iY5KC8kI8d9ty5D7NbP6LKQbX X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDA2NiBTYWx0ZWRfX2fNg71wFchkX VVThO27B6SkB7cRYuyZvcQvn4lWZnBgL+ImfLxpMc2H0Sr7Sn4ngshYYB4WnG/VZwzYlafbnZGs 8DsyG2UvuVqoqMaMKIC69xXQDziNn8jo0gwkD1fdiOuYMWyJxrfC/7g+BD3KXdRRoPWThoJU7v5 pFfcRSe/egMi60vwapWNPrZm8OaXWAFGfOPdFw+0yIB2yKZCw93OX51Lm7U7JCN2KsTcQhDRYMa Hg4/mq73bkLFkhIrp0RIz67UAwT+8p/R1naYNnkcnHh3GEmiQD+VvxN9msOQYYv++2wdqSkmlvo GK3IsNSjnDnwFhzFB/jUKdwVgjnh2hiP9CN/O65+IPajGEaxSETvWz+h8TJlzd1YAvv+o6ziP9Q 0vL27ahdI4uaHG/pEOk7QOxFvBaJ3Myb/Gv3Z/0vtWDfjHcOvfpCUSKdBUems7HxzcEFdaOUqUP LWuZNsqu6QF2Q9rff9A== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 impostorscore=0 phishscore=0 clxscore=1015 spamscore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030066 Add pm_runtime_forbid() to balance the pm_runtime_allow() call made during probe. Without this, the device remains in runtime PM allowed state after driver removal. Fixes: 855a70c12021 ("bus: mhi: Add MHI PCI support for WWAN modems") Signed-off-by: Qiang Yu --- drivers/bus/mhi/host/pci_generic.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_= generic.c index 0395a8ea52b0e874209ca56cd20ed04419038cdb..b6b21d0f3388d61b771062b8077= f836a6bf8f9f8 100644 --- a/drivers/bus/mhi/host/pci_generic.c +++ b/drivers/bus/mhi/host/pci_generic.c @@ -1459,6 +1459,7 @@ static void mhi_pci_remove(struct pci_dev *pdev) mhi_soc_reset(mhi_cntrl); =20 mhi_unregister_controller(mhi_cntrl); + pm_runtime_forbid(&pdev->dev); } =20 static void mhi_pci_shutdown(struct pci_dev *pdev) --=20 2.34.1