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Thu, 11 Dec 2025 00:07:56 -0800 (PST) Received: from [10.213.102.126] ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7f4c22848a7sm1706651b3a.3.2025.12.11.00.07.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Dec 2025 00:07:55 -0800 (PST) From: Sivareddy Surasani Date: Thu, 11 Dec 2025 13:37:36 +0530 Subject: [PATCH 04/11] Revert "bus: mhi: host: Remove mhi_poll() API" 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: <20251211-siva_mhi_dp2-v1-4-d2895c4ec73a@oss.qualcomm.com> References: <20251211-siva_mhi_dp2-v1-0-d2895c4ec73a@oss.qualcomm.com> In-Reply-To: <20251211-siva_mhi_dp2-v1-0-d2895c4ec73a@oss.qualcomm.com> To: Manivannan Sadhasivam , Jonathan Corbet , Arnd Bergmann , Greg Kroah-Hartman Cc: mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Upal Kumar Saha , Himanshu Shukla , Sivareddy Surasani , Vivek Pernamitta X-Mailer: b4 0.15-dev-47773 X-Authority-Analysis: v=2.4 cv=Hc0ZjyE8 c=1 sm=1 tr=0 ts=693a7bdd cx=c_pps a=m5Vt/hrsBiPMCU0y4gIsQw==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=oQAhVp1KcIWGeVV0ezEA:9 a=QEXdDO2ut3YA:10 a=IoOABgeZipijB_acs4fv:22 X-Proofpoint-GUID: 0BecWNA-eHE-bDPI5db-PFcY3LRNmkdk X-Proofpoint-ORIG-GUID: 0BecWNA-eHE-bDPI5db-PFcY3LRNmkdk X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjExMDA1OSBTYWx0ZWRfX60LxcdvIyW1/ 73z1A0ru6vKbfpTyGSHnCzcv0yUahzTCKynMrDccSDmAMwTSfcJG1djzwm/Pa5A/I5JQARnh3Oq 8nE0tqOI8I+ASYWd90Rf9xFMkOzpK1/27PKDwwRUWPknfTUZJtelB6CIia+FSDf/H8dJR6IoWJh MU3+CCpl2orgjuXVR4vtYV0m74u+UTmhnldXrpv7M5jSNhn2PK3U6T+q8mPwXYA3j9RgPNhuNHv ZvUz3KVP7qgau5GXbotR2gVpRS6tMMoxli35GB2qjf9N0lh+uU3VC/rZe7goasT+h072kq4YAMQ KJvjX+MYTudUJgR2Usedj06/zBtfGRahTlrpQQ4I51GobHBszLD05rUzqYIyVCtlma4OJkPBfQ8 /cXDM7p12r+0rmCCXzQ4kWzrBAgo9g== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-10_03,2025-12-09_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 adultscore=0 bulkscore=0 malwarescore=0 priorityscore=1501 spamscore=0 suspectscore=0 clxscore=1011 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2512110059 From: Vivek Pernamitta Revert commit 5da094ac80cd ("bus: mhi: host: Remove mhi_poll() API") Add mhi_poll() API. New hardware channel clients use mhi_poll() to manage their own completion events instead of relying on the MHI core driver for notifications. Signed-off-by: Vivek Pernamitta Signed-off-by: Sivareddy Surasani --- drivers/bus/mhi/host/main.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c index 7beb848ca5c1..5d50f6ebf6f9 100644 --- a/drivers/bus/mhi/host/main.c +++ b/drivers/bus/mhi/host/main.c @@ -1858,3 +1858,18 @@ int mhi_get_channel_doorbell_offset(struct mhi_contr= oller *mhi_cntrl, u32 *chdb_ return 0; } EXPORT_SYMBOL_GPL(mhi_get_channel_doorbell_offset); + +int mhi_poll(struct mhi_device *mhi_dev, u32 budget) +{ + struct mhi_controller *mhi_cntrl =3D mhi_dev->mhi_cntrl; + struct mhi_chan *mhi_chan =3D mhi_dev->dl_chan; + struct mhi_event *mhi_event =3D &mhi_cntrl->mhi_event[mhi_chan->er_index]; + int ret; + + spin_lock_bh(&mhi_event->lock); + ret =3D mhi_event->process_event(mhi_cntrl, mhi_event, budget); + spin_unlock_bh(&mhi_event->lock); + + return ret; +} +EXPORT_SYMBOL_GPL(mhi_poll); --=20 2.34.1