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[175.34.8.244]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3153e04506csm46284807eec.17.2026.08.03.20.42.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 03 Aug 2026 20:42:24 -0700 (PDT) Message-ID: <26bb2daa-555f-437f-99bc-b92080bec9d1@redhat.com> Date: Tue, 4 Aug 2026 13:42:14 +1000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 02/11] arm_mpam: propagate MSC access errors for hw_probe functions To: Andre Przywara , Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , Catalin Marinas , Will Deacon , "Rafael J . Wysocki" , Len Brown , James Morse , Ben Horgan , Reinette Chatre , Fenghua Yu Cc: Jonathan Cameron , Srivathsa L Rao , Ganapatrao Kulkarni , Trilok Soni , Srinivas Ramana , Niyas Sait , Lee Trager , Ritwick Sharma , linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260731170324.2927758-1-andre.przywara@arm.com> <20260731170324.2927758-3-andre.przywara@arm.com> From: Gavin Shan In-Reply-To: <20260731170324.2927758-3-andre.przywara@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: ofeiSfyvw5z70lS-7j1J0x7-DUvAryIf1Pq4r-ra4wE_1785814946 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260803_204231_302656_DCDA72A5 X-CRM114-Status: GOOD ( 11.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 8/1/26 3:03 AM, Andre Przywara wrote: > Allow the functions probing for MSC hardware and features to return an > error, and propagate read and write errors from the lower level up. > This uses some "scoped cleanup" functions like scoped_guard() and > ACQUIRE() to avoid the complexity of error handling when a lock has been > taken. Since the mon_sel_lock is a bit special (even more so in an > upcoming patch), we define a new GUARD type for it. > > Signed-off-by: Andre Przywara > Reviewed-by: Jonathan Cameron > Reviewed-by: Ben Horgan > --- > drivers/resctrl/mpam_devices.c | 126 +++++++++++++++++++++----------- > drivers/resctrl/mpam_internal.h | 4 + > 2 files changed, 87 insertions(+), 43 deletions(-) > Reviewed-by: Gavin Shan