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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aa5998e63b8sm99872266b.123.2024.11.28.12.25.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 28 Nov 2024 12:25:27 -0800 (PST) Message-ID: <503df6db-8937-4e1c-9c0e-0cc093681a8b@oss.qualcomm.com> Date: Thu, 28 Nov 2024 21:25:25 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC/RFT 4/6] firmware: qcom: scm: Cleanup global '__scm' on probe failures To: Krzysztof Kozlowski , Bjorn Andersson , Konrad Dybcio , Mukesh Ojha , Dmitry Baryshkov , Stephan Gerhold , Bartosz Golaszewski , Kuldeep Singh , Elliot Berman , Andrew Halaney , Avaneesh Kumar Dwivedi , Andy Gross Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20241119-qcom-scm-missing-barriers-and-all-sort-of-srap-v1-0-7056127007a7@linaro.org> <20241119-qcom-scm-missing-barriers-and-all-sort-of-srap-v1-4-7056127007a7@linaro.org> <3bfd6343-de4a-4cf5-a4b8-55a3531eb41e@linaro.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <3bfd6343-de4a-4cf5-a4b8-55a3531eb41e@linaro.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: Q2Zt6VRNeVgVMF-bbKs7ihkufuzkwSUx X-Proofpoint-ORIG-GUID: Q2Zt6VRNeVgVMF-bbKs7ihkufuzkwSUx X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 lowpriorityscore=0 impostorscore=0 bulkscore=0 mlxscore=0 malwarescore=0 priorityscore=1501 spamscore=0 mlxlogscore=999 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2411280162 On 19.11.2024 8:37 PM, Krzysztof Kozlowski wrote: > On 19/11/2024 19:33, Krzysztof Kozlowski wrote: >> /* >> * Initialize the QSEECOM interface. >> @@ -2094,6 +2104,12 @@ static int qcom_scm_probe(struct platform_device *pdev) >> WARN(ret < 0, "failed to initialize qseecom: %d\n", ret); >> >> return 0; >> + >> +err: >> + /* Paired with smp_load_acquire() in qcom_scm_is_available(). */ >> + smp_store_release(&__scm, 0); > Heh, I should store there NULL, obviously. Candidate for a new scoped __free, perhaps? Konrad