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[109.252.170.211]) by smtp.googlemail.com with ESMTPSA id t23sm259746ljc.125.2020.09.30.14.56.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Sep 2020 14:56:47 -0700 (PDT) Subject: Re: [PATCH v3 2/3] iommu/tegra-smmu: Rework .probe_device and .attach_dev To: Nicolin Chen References: <20200930084258.25493-1-nicoleotsuka@gmail.com> <20200930084258.25493-3-nicoleotsuka@gmail.com> <20200930153131.GB3833404@ulmo> <20200930203618.GC2110@Asurada-Nvidia> <13746922-0253-cda7-e9ac-2bd20bf1a17f@gmail.com> <20200930213244.GA10573@Asurada-Nvidia> From: Dmitry Osipenko Message-ID: <5945a63e-79d8-e3ae-ab53-cee8c220ac7d@gmail.com> Date: Thu, 1 Oct 2020 00:56:46 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200930213244.GA10573@Asurada-Nvidia> Content-Language: en-US Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, krzk@kernel.org, jonathanh@nvidia.com, Thierry Reding , linux-tegra@vger.kernel.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" MDEuMTAuMjAyMCAwMDozMiwgTmljb2xpbiBDaGVuINC/0LjRiNC10YI6Cj4gT24gVGh1LCBPY3Qg MDEsIDIwMjAgYXQgMTI6MjQ6MjVBTSArMDMwMCwgRG1pdHJ5IE9zaXBlbmtvIHdyb3RlOgo+PiAu Li4KPj4+PiBJdCBsb29rcyB0byBtZSBsaWtlIHRoZSBvbmx5IHJlYXNvbiB3aHkgeW91IG5lZWQg dGhpcyBuZXcgZ2xvYmFsIEFQSSBpcwo+Pj4+IGJlY2F1c2UgUENJIGRldmljZXMgbWF5IG5vdCBo YXZlIGEgZGV2aWNlIHRyZWUgbm9kZSB3aXRoIGEgcGhhbmRsZSB0bwo+Pj4+IHRoZSBJT01NVS4g SG93ZXZlciwgU01NVSBzdXBwb3J0IGZvciBQQ0kgd2lsbCBvbmx5IGJlIGVuYWJsZWQgaWYgdGhl Cj4+Pj4gcm9vdCBjb21wbGV4IGhhcyBhbiBpb21tdXMgcHJvcGVydHksIHJpZ2h0PyBJbiB0aGF0 IGNhc2UsIGNhbid0IHdlCj4+Pj4gc2ltcGx5IGRvIHNvbWV0aGluZyBsaWtlIHRoaXM6Cj4+Pj4K Pj4+PiAJaWYgKGRldl9pc19wY2koZGV2KSkKPj4+PiAJCW5wID0gZmluZF9ob3N0X2JyaWRnZShk ZXYpLT5vZl9ub2RlOwo+Pj4+IAllbHNlCj4+Pj4gCQlucCA9IGRldi0+b2Zfbm9kZTsKPj4+Pgo+ Pj4+ID8gSSdtIG5vdCBzdXJlIGV4YWN0bHkgd2hhdCBmaW5kX2hvc3RfYnJpZGdlKCkgaXMgY2Fs bGVkLCBidXQgSSdtIHByZXR0eQo+Pj4+IHN1cmUgdGhhdCBleGlzdHMuCj4+Pj4KPj4+PiBPbmNl IHdlIGhhdmUgdGhhdCB3ZSBjYW4gc3RpbGwgaXRlcmF0ZSBvdmVyIHRoZSBpb21tdXMgcHJvcGVy dHkgYW5kIGRvCj4+Pj4gbm90IG5lZWQgdG8gcmVseSBvbiB0aGlzIGdsb2JhbCB2YXJpYWJsZS4K Pj4+Cj4+PiBJIGFncmVlIHRoYXQgaXQnZCB3b3JrLiBCdXQgSSB3YXMgaG9waW5nIHRvIHNpbXBs aWZ5IHRoZSBjb2RlCj4+PiBoZXJlIGlmIGl0J3MgcG9zc2libGUuIExvb2tzIGxpa2Ugd2UgaGF2 ZSBhbiBhcmd1bWVudCBvbiB0aGlzCj4+PiBzbyBJIHdpbGwgY2hvb3NlIHRvIGdvIHdpdGggeW91 ciBzdWdnZXN0aW9uIGFib3ZlIGZvciBub3cuCj4+Cj4+IFRoaXMgcGF0Y2ggcmVtb3ZlZCBtb3Jl IGxpbmVzIHRoYW4gd2VyZSBhZGRlZC4gSWYgdGhpcyB3aWxsIGJlIG9wcG9zaXRlCj4+IGZvciB0 aGUgVGhpZXJyeSdzIHN1Z2dlc3Rpb24sIHRoZW4gaXQncyBwcm9iYWJseSBub3QgYSBncmVhdCBz dWdnZXN0aW9uLgo+IAo+IFNvcnJ5LCBJIGRvbid0IHF1aXRlIHVuZGVyc3RhbmQgdGhpcyBjb21t ZW50cy4gV291bGQgeW91IHBsZWFzZQo+IGVsYWJvcmF0ZSB3aGF0J3MgdGhpcyAiaXQiIGJlaW5n ICJub3QgYSBncmVhdCBzdWdnZXN0aW9uIj8KPiAKCkkgbWVhbnQgdGhhdCB5b3Ugc2hvdWxkIHRy eSB0byBpbXBsZW1lbnQgVGhpZXJyeSdzIHNvbHV0aW9uLCBidXQgaWYgdGhlCmVuZCByZXN1bHQg d2lsbCBiZSB3b3JzZSB0aGFuIHRoZSBjdXJyZW50IHBhdGNoLCB0aGVuIHlvdSBzaG91bGRuJ3Qg bWFrZQphIHY0LCBidXQgZ2V0IGJhY2sgdG8gdGhpcyBkaXNjdXNzaW9uIGluIG9yZGVyIHRvIGNo b29zZSB0aGUgYmVzdCBvcHRpb24KYW5kIG1ha2UgZXZlcnlvbmUgYWdyZWUgb24gaXQuCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcg bGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4 Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==