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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39d98e60484sm19488728a91.4.2026.09.14.02.40.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Sep 2026 02:40:33 -0700 (PDT) From: Yin Li Date: Mon, 14 Sep 2026 17:37:55 +0800 Subject: [PATCH RFC v2 07/10] arm_mpam: Fix mpam_dt_create_foundling_msc() to create MSC platform devices Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260914-mpam-resctrl-dt-knp-support-v2-7-bf6645bb2f65@oss.qualcomm.com> References: <20260914-mpam-resctrl-dt-knp-support-v2-0-bf6645bb2f65@oss.qualcomm.com> In-Reply-To: <20260914-mpam-resctrl-dt-knp-support-v2-0-bf6645bb2f65@oss.qualcomm.com> To: James Morse , Rob Herring , Shanker Donthineni , Ben Horgan , Krzysztof Kozlowski , Conor Dooley , Catalin Marinas , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Reinette Chatre , Fenghua Yu , Jonathan Cameron , Bjorn Andersson , Konrad Dybcio , Gavin Shan Cc: Yin Li , Andre Przywara , Drew Fustini , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Shaopeng Tan , trilok.soni@oss.qualcomm.com, aiqun.yu@oss.qualcomm.com, ganapatrao.kulkarni@oss.qualcomm.com, Srivathsa L Rao , Huang Yiwei , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, driver-core@lists.linux.dev, devicetree@vger.kernel.org X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1789378765; l=1946; i=yin.li@oss.qualcomm.com; s=20260811; h=from:subject:message-id; bh=Eup0TFC52Dvb5C0RkUrvytnZqSb5g4QWq/ztKU5w+8Q=; b=fXbWfUPGaOjktIrRdd0qWh/gG9DAXYutlr2e3ZmvjdmcsduoOF8c4KLO90VZPV33CVNCkTVC1 Rxwgo62tnAQBpp4OtifMAO9MA/mDvKp/0V6F38k1t2gH4Muaj3j3HEI X-Developer-Key: i=yin.li@oss.qualcomm.com; a=ed25519; pk=e/2LM97aSWGBMrxY240URBi9Zi8/kL5hXgB+VHkYvW0= X-Proofpoint-ORIG-GUID: C28lTVx2CR5j7-WC9XAc4zXkyrKaiSyF X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE0MDEzNyBTYWx0ZWRfX0ylgFtFkW95D AHX6UaU2jpjPMLAfVqkKqddRHKD1jNuo1ZdUMBDZ6nEyznl+EBUJ0Si6Fs+dGmJBlZiC8SGrven riNnMr99+VNZipGubtwAnaLO4xVyxpM= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE0MDEzNyBTYWx0ZWRfXw4bzTr+FSkOt nzQaQ2qTMCRiIR0RUMCgvjhBineSaZOUG1ftyud1hUWnjVH9vFzFXiD8WPnUOQzOYohRe/+5F+b 3yryUl197/oebxejxsrQUAwXa/v/mjhRgL6/55cKLxcMGkvrYxXKuL7UsULzNWP5NDYOlI7qCd9 Ggbzw/HItNBiYLWzvKe9aHadxBFq4yoJ2iUvvnpdsPcOypS5bw9kflzzTmxwEid8HYr6dhXVUMJ UG8ZQarJdClRWfTJD1YO/hygGFoh7gLMfNPDXF0LmFhkvqKGECPX8zK1zT43tQivxQ1Smh7oJC2 Mv1tQQM1rh446Mk9UoQR/+xkQqwzA6iRxj3ktXBD1U7Nct31AUanHrtAziNtAOlJ0UMCyiDLCUj TrprO5WPNC1cYAJTvXYGshQyvS2W1jJUemN3ncUWxI1pwsUbGjS4Ya/TY1QkRBNdMA6CwICNAC9 kS73Wh38AICOa+sT5hw== X-Authority-Analysis: v=2.4 cv=XKel2ghE c=1 sm=1 tr=0 ts=6aa7c113 cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=rtFuv77GRgtEkpuRCi4A:9 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 X-Proofpoint-GUID: C28lTVx2CR5j7-WC9XAc4zXkyrKaiSyF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-14_02,2026-09-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 spamscore=0 bulkscore=0 phishscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 clxscore=1015 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609140137 The original code created a platform device for the cache node itself rather than for the MSC, so the MSC was never created. Instead, walk the cache's children using for_each_child_of_node_scoped() and create the platform device for the MSC child node, skipping cache parents that firmware has marked disabled. Co-developed-by: Huang Yiwei Signed-off-by: Huang Yiwei Signed-off-by: Yin Li --- drivers/resctrl/mpam_devices.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c index 480e38cfa86d..7ef3ed55b066 100644 --- a/drivers/resctrl/mpam_devices.c +++ b/drivers/resctrl/mpam_devices.c @@ -2366,23 +2366,20 @@ static struct platform_driver mpam_msc_driver = { */ static void mpam_dt_create_foundling_msc(void) { - struct platform_device *pdev; - struct device_node *cache; - - for_each_compatible_node(cache, NULL, "cache") { - struct device_node *cache_device; - - if (of_node_check_flag(cache, OF_POPULATED)) - continue; - - cache_device = of_find_matching_node_and_match(cache, mpam_of_match, NULL); - if (!cache_device) + for_each_compatible_node_scoped(cache, NULL, "cache") { + if (!of_device_is_available(cache)) continue; - of_node_put(cache_device); - pdev = of_platform_device_create(cache, "cache", NULL); - if (!pdev) - pr_err_once("Failed to create MSC devices under caches\n"); + for_each_child_of_node_scoped(cache, child) { + if (!of_match_node(mpam_of_match, child)) + continue; + if (!of_device_is_available(child)) + continue; + if (of_node_check_flag(child, OF_POPULATED)) + continue; + if (!of_platform_device_create(child, NULL, NULL)) + pr_err("Failed to create MSC device for %pOF\n", child); + } } } -- 2.34.1