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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3990d75fc49sm10447855a91.12.2026.09.02.01.52.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Sep 2026 01:52:47 -0700 (PDT) Message-ID: <163b2dba-0af9-4594-8067-be9e711bb4b4@oss.qualcomm.com> Date: Wed, 2 Sep 2026 16:52:39 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] coresight: fix trace ID search skipping pass-through NoC devices To: Leo Yan Cc: Suzuki K Poulose , Mike Leach , James Clark , Alexander Shishkin , Richard Cheng , coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260817-fix-trace-id-assign-issue-v1-1-b2164e33f9fa@oss.qualcomm.com> <20260902082209.GT8904@e132581.arm.com> <28d5c8bf-87b1-4172-94a8-0e1b7ba1f083@oss.qualcomm.com> <20260902084538.GU8904@e132581.arm.com> Content-Language: en-US From: Jie Gan In-Reply-To: <20260902084538.GU8904@e132581.arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAyMDA3OCBTYWx0ZWRfX+0TatRRMJNo4 msRgqARZy68e6LeJKp/YlF4IuQdRV+odcImLb2f5pqrUBzsXSPLhb3+bxosL4/Izai9QfXioQvc itWlPuNtFpy2eyuulkUtleMeF7oNQjafXS9CTbWDorzWnqkwHlFGgFBgYC8yzwieuNV56QaXRyS 2lieClbLroc0lrrc6GDnyiUI9TTvNGtccd6eWxTgjjRVmUPN/oxslcuIFZA47YEAiaGliVkdx7/ EPLHlNm64KxcI4iD/rJfFN7eJZpFNz3VnwCwXF9Hwd8+0YqhwUVZ1m4gNdJhpfTtKER9ejW/CpA kkAG95YX0S2d8DUKRSt09AP/M1L8BOznPsvxr0VkyE2IXimX5OXTfLAAM5uYXHbocPcIWMUR+CO TlmXwESe5MaR3vsU8s47w7roLBf8lQybHrrPRi/6EWSg2z8AVts+4RNiMZwXyn74eKeD11CY/HS Qwp52BdhazBKUz40ZUQ== X-Proofpoint-GUID: _AY4FzYpgh6A-5CaM2ahQu5Wz81w-zco X-Proofpoint-ORIG-GUID: _AY4FzYpgh6A-5CaM2ahQu5Wz81w-zco X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAyMDA3OCBTYWx0ZWRfX18qfxyR1eXuW h68sPhbl5uuV8GGB27u6v7g4RRNTNwdI1SMm+3V5OZ00lA9r4qPXm0shZ9UcFSUpkYEpcGPZJUh 4c6uau+XeXnUcKPfgYaLfYsjG9JCTpM= X-Authority-Analysis: v=2.4 cv=R9oz39RX c=1 sm=1 tr=0 ts=6a97e3e1 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=_glEPmIy2e8OvE2BGh3C:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=ASdo0e-X16dllrNbtIEA:9 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 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=2026-09-02_01,2026-09-01_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 bulkscore=0 spamscore=0 lowpriorityscore=0 phishscore=0 adultscore=0 malwarescore=0 clxscore=1015 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609020078 On 9/2/2026 4:45 PM, Leo Yan wrote: > On Wed, Sep 02, 2026 at 04:35:11PM +0800, Jie Gan wrote: > > [...] > >> Hi Leo, >> >> Thanks for the suggestion. > > You're welcome! > >> I will fix this in the TNOC driver. I agree that there is no need to use >> additional error codes to report the failure. >> >> I will post the new fix patch after below patch[1] to be applied to avoid >> conflict. > > The patch in the link has no fix tag, but current patch is a simple fix. I called it as a fix because the TNOC device cannot be probed by the AMBA driver unless the PID is manually assigned. This is a hardware limitation rather than a driver issue. The problem is resolved by switching the device to use a platform driver, so I didnt add a fixes tag. I will send the simple fix first. Depending on which patch gets applied first, I'll respin the other one to avoid conflicts. Thanks, Jie > I'd suggest to give priority this patch - this is friendly for porting > to stable kernels. > > If there have dependency (based on your local test), you could explictly > mention the dependency in cover letter and resend the tnoc probe series. > > Thanks, > Leo > >> [1] https://lore.kernel.org/all/20260710-fix-tracenoc-probe-issue-v6-2-41eb36fef8d9@oss.qualcomm.com/