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([2601:586:5000:570:aad6:acd8:4ed9:299b]) by smtp.gmail.com with ESMTPSA id bp9-20020a05620a458900b006f7ee901674sm2986683qkb.2.2022.11.04.06.47.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 04 Nov 2022 06:47:17 -0700 (PDT) Message-ID: <39aac9a0-a2cb-af98-8274-93ff0a7da095@linaro.org> Date: Fri, 4 Nov 2022 09:47:15 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 Subject: Re: [PATCH v2 4/6] iommu/exynos: Implement shutdown driver method Content-Language: en-US To: Sam Protsenko , Marek Szyprowski Cc: Joerg Roedel , Will Deacon , Robin Murphy , Sumit Semwal , Alim Akhtar , Janghyuck Kim , Cho KyongHo , Daniel Mentz , David Virag , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org References: <20221103195154.21495-1-semen.protsenko@linaro.org> <20221103195154.21495-5-semen.protsenko@linaro.org> From: Krzysztof Kozlowski In-Reply-To: <20221103195154.21495-5-semen.protsenko@linaro.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/11/2022 15:51, Sam Protsenko wrote: > While remove method shouldn't be implemented, as it can't be done > reliably, the shutdown method can be useful for performing a kexec. > That was inspired by other IOMMU drivers, see commit 1a4e90f25b2c > ("iommu/rockchip: Perform a reset on shutdown") for example. > > Signed-off-by: Sam Protsenko Acked-by: Krzysztof Kozlowski Best regards, Krzysztof