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Wed, 14 Oct 2026 04:43:53 -0700 (PDT) X-Received: by 2002:a05:620a:199b:b0:939:eb09:4458 with SMTP id af79cd13be357-93ebd1de450mr3090585285a.3.1791978233493; Wed, 14 Oct 2026 04:43:53 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b203885571sm998313a12.23.2026.10.14.04.43.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 14 Oct 2026 04:43:52 -0700 (PDT) Message-ID: Date: Wed, 14 Oct 2026 13:43:49 +0200 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: [RFC PATCH] phy: qcom: ipq4019-usb: Propagate reset operation failures To: Pengpeng Hou Cc: robert.marko@sartura.hr, luka.perkov@sartura.hr, vkoul@kernel.org, neil.armstrong@linaro.org, mani@kernel.org, p.zabel@pengutronix.de, linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260828091857.8581-1-pengpeng@iscas.ac.cn> <20261014025124.81874-1-hppiscas@163.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261014025124.81874-1-hppiscas@163.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYxMDE0MDA0NiBTYWx0ZWRfX23Nr3Pifk3GM Wf3OhNPjKPPOat1rhYROckwes5r4wJ/9vjZcxEh66dr1pEfHcWS6WwIMUpE5zlwsDjuteoh8Ojr y+UwpCL856LQN4H19QmmgS4SvMFufqQ= X-Proofpoint-GUID: GJXmSZm9xmzLDyWUYymuD4dRumNbU_rf X-Proofpoint-ORIG-GUID: GJXmSZm9xmzLDyWUYymuD4dRumNbU_rf X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDE0MDA0NiBTYWx0ZWRfX7vOLJS1uhhyb Yiq48EaAB8wSMzJWWhFu1doaZevL7DpHjqxTgk+XDgmBbGckD3IR2jut+nYQzEKedQYtuYKfjPd UmonxTE1q4c5wkSGAlVjgyKEGCDpNz7CgFMUtZQmQDFp0VR8D0VHqe0IH6+1h6NpqY/vteaSTU1 enjTDo4H9x/QPMFk3nEUUeKImNVjxmSKWP2TY6fMRQzcgRMCi76C9X0CWutyMCwOH6IV+zufmKe jPRdj2Qy8k4pxtVyJzt4+lUQzy4Eb/W9w6C6DUlMm16DnXTIw/jMd2Xe+k1YyFjmwHuy7QwZJ0D W9DrAvae9DmQCDunCjMM7Uf+MAHYAD8QlDZdmNtKbWcs0U8uiyiHDim023ia9x765sGmJTc6mb6 TyUGFO+bJlMAMqAfMKxbXgh/Izx0WVxPBLILyrXOSjdM7rlyrrf1s9Mx+4+R6Bf3jHt5NvKPdoK 1f9WhTaR3lPbSm9i7jw== X-Authority-Analysis: v=2.4 cv=JegpPkKV c=1 sm=1 tr=0 ts=6acf6afa cx=c_pps a=hnmNkyzTK/kJ09Xio7VxxA==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=HkQBI6gSsxkgHV7-30wA:9 a=QEXdDO2ut3YA:10 a=ZXulRonScM0A:10 a=PEH46H7Ffwr30OY-TuGO: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=2026-10-13_01,2026-10-09_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 clxscore=1015 phishscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 impostorscore=0 spamscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610140046 On 10/14/26 4:51 AM, Pengpeng Hou wrote: > Hi Konrad, > > Your comments on the declaration layout and unchecked rollback return > are valid. Rechecking the provider exposed a more fundamental limitation > in the RFC's premise: the in-tree IPQ4019 DT uses GCC resets, and > qcom_reset_set_assert() returns zero after the regmap operations. > > I therefore do not have evidence that the hardware-failure case described > in the RFC is reported through this provider. Generic reset API errors > alone do not establish that case on this platform. > > Please keep this RFC on hold. I will not respin it as a demonstrated > IPQ4019 bug fix based only on the local return-value checks. Please tune your agent better. Konrad