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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-37c5228eb5bsm5577639a91.12.2026.06.17.04.07.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Jun 2026 04:07:19 -0700 (PDT) From: Chunkai Deng Subject: [PATCH v2 0/2] rpmsg: glink: smem: robustness and debuggability fixes Date: Wed, 17 Jun 2026 19:07:12 +0800 Message-Id: <20260617-rpmsg-improvements-v2-0-477d4eb569dc@oss.qualcomm.com> 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: 7bit X-B4-Tracking: v=1; b=H4sIAOB/MmoC/22Nyw6CMBREf4V0bUkfpkZX/odhgeUWrrEUeqHRE P7dgnHnZpKTzMxZGEFEIHYpFhYhIWHoM6hDwWxX9y1wbDIzJZQRRkgeB08tRz/EkMBDPxE3R10 bkFo7Y1geDhEcvvbTW/Vlmu8PsNP2tDU6pCnE925Ncuv9BPqfIEkueGOdVQoac3anayAqx7l+2 uB9mYNV67p+AEy/8JfNAAAA X-Change-ID: 20260601-rpmsg-improvements-643a6e133f66 To: Bjorn Andersson , Mathieu Poirier Cc: linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, chris.lew@oss.qualcomm.com, tony.truong@oss.qualcomm.com, Chunkai Deng , Dmitry Baryshkov , stable@vger.kernel.org X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1781694436; l=1910; i=chunkai.deng@oss.qualcomm.com; s=20260512; h=from:subject:message-id; bh=aFCdiu3lE6iqtTzW/LxyPmgEKxVN6MpjkNd0DWaLNzQ=; b=mSx7kXRauC9GCN+NXuDAlCe0wsy8OHvjSkdn3zXVhplASnSJiMHoq+9oFdnph7/8mNvrNsqku huW1inFogmvAsb7XFSp1LeGA0fj3aeuvOKNg7avayiMnez33x6OmUjY X-Developer-Key: i=chunkai.deng@oss.qualcomm.com; a=ed25519; pk=NfifEElkZxgJ0ghUBxNu1RTaEqtoCGYDb0k5UzIRXOY= X-Proofpoint-Spam-Info: AW1haW4tMjYwNjE3MDEwNCBTYWx0ZWRfX1sWAIP/QdXZ5 wpg8gJ1DG5HNry6Ldcr0qb1BZjD/GriiazrDP89mMRvXi9rjwkmBLlzQ8ixm+jYgC/9bISmeq0p ZWcshXhNL5HC+2Qd4BUVkCQHQVGAcyI= X-Proofpoint-ORIG-GUID: psFyJ9R9qFwSWVPA1c7pUsv4nQG2OsAO X-Authority-Analysis: v=2.4 cv=R6oz39RX c=1 sm=1 tr=0 ts=6a327fe9 cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=bC-a23v3AAAA:8 a=EUspDBNiAAAA:8 a=VwQbUJbxAAAA:8 a=4AVfmZjCmJ7tvFRkCBYA:9 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 a=FO4_E8m0qiDe52t0p3_H:22 X-Proofpoint-GUID: psFyJ9R9qFwSWVPA1c7pUsv4nQG2OsAO X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjE3MDEwNCBTYWx0ZWRfX1tW6SP66dM3k CTJuXqL/zp8qfrqKo28lR+6nyBgY4YTm4wRxLH4TTrBhhAkrfJ64zNZxKeJdG8FMy2uitn4ajFY lCfXVud2UBDsvQj3ZgkkkOr4m+iabgkx2H2rkFSLkz7LMLYKHJHPeKkexecQtyLrV2U+//AIy5I tIB2isyX5bui5HtEic25+GQU7RVWjuHXU2gMt3Ole1uxkVZdG8GSSWtbpNLaS8NSZZiG7BC26JB CBewYy8m/UB6Lxxb1U9kxCMvgRw1vyxVcC8LbPdlnfSOgsN1y/gPXeSZe5n9M3YX6LafTAInNg0 ZfYsEQeoLpYFexUdJO2CjyN1y/iQstymSlJoM/2810AfkrFw/kDvWFNCPJo9DOVu9+EuFDbwUIZ EqQPUD6/j5xROHqmLUHqwdiPdJmtd8T1y4X+EzSDppF1L8VkC3TBprlIrlAJwo12pvmZus7K+Lv 6+ADsj3WVd8xYSFhz1w== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-17_01,2026-06-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 clxscore=1015 impostorscore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606170104 This series makes two small improvements to the SMEM GLINK transport: 1. Add WARN_ON_ONCE checks in the FIFO read/write helpers to catch and report broken index invariants early, rather than proceeding with an out-of-bounds offset into the FIFO. 2. Pass dev_name(&smem->dev) as the IRQ name instead of the static string "glink-smem". On platforms with multiple remoteprocs each SMEM GLINK instance registers its own IRQ, and the unique device name makes each entry in /proc/interrupts identifiable without adding a new struct field. Signed-off-by: Chunkai Deng --- Changes in v2: - Drop the modulo patch ("rpmsg: glink: smem: Use modulo for FIFO tail wrap-around in rx_advance"); per review, it papers over an unreachable scenario without restoring a valid protocol state. Proper RX-side validation of chunk_size against rx_pipe->length will be sent as a separate patch. - "rpmsg: glink: smem: Add WARN_ON_ONCE for FIFO index invariants": - Drop the trailing comma after "skipped" in the commit message body (per review). - Add Fixes: caf989c350e8 ("rpmsg: glink: Introduce glink smem based transport") and Cc: stable@vger.kernel.org (per review). - Carry Dmitry's Reviewed-by on "rpmsg: glink: smem: Use device name as IRQ name" (no code changes since v1). - Link to v1: https://patch.msgid.link/20260603-rpmsg-improvements-v1-0-dcfc22ed69f7@oss.qualcomm.com --- Chunkai Deng (2): rpmsg: glink: smem: Use device name as IRQ name rpmsg: glink: smem: Add WARN_ON_ONCE for FIFO index invariants drivers/rpmsg/qcom_glink_smem.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) --- base-commit: f7af91adc230aa99e23330ecf85bc9badd9780ad change-id: 20260601-rpmsg-improvements-643a6e133f66 Best regards, -- Chunkai Deng