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[216.228.112.22]) by smtp.gmail.com with ESMTPSA id v13sm728237pjr.12.2020.09.29.22.46.49 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Tue, 29 Sep 2020 22:46:50 -0700 (PDT) Date: Tue, 29 Sep 2020 22:41:20 -0700 From: Nicolin Chen To: Dmitry Osipenko Subject: Re: [PATCH v2 2/3] iommu/tegra-smmu: Rework .probe_device and .attach_dev Message-ID: <20200930054119.GE31821@Asurada-Nvidia> References: <20200930003013.31289-1-nicoleotsuka@gmail.com> <20200930003013.31289-3-nicoleotsuka@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, krzk@kernel.org, jonathanh@nvidia.com, thierry.reding@gmail.com, 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" T24gV2VkLCBTZXAgMzAsIDIwMjAgYXQgMDg6Mzk6NTRBTSArMDMwMCwgRG1pdHJ5IE9zaXBlbmtv IHdyb3RlOgo+IDMwLjA5LjIwMjAgMDM6MzAsIE5pY29saW4gQ2hlbiDQv9C40YjQtdGCOgo+ID4g IHN0YXRpYyBpbnQgdGVncmFfc21tdV9hdHRhY2hfZGV2KHN0cnVjdCBpb21tdV9kb21haW4gKmRv bWFpbiwKPiA+ICAJCQkJIHN0cnVjdCBkZXZpY2UgKmRldikKPiA+ICB7Cj4gPiArCXN0cnVjdCBp b21tdV9md3NwZWMgKmZ3c3BlYyA9IGRldl9pb21tdV9md3NwZWNfZ2V0KGRldik7Cj4gPiAgCXN0 cnVjdCB0ZWdyYV9zbW11ICpzbW11ID0gZGV2X2lvbW11X3ByaXZfZ2V0KGRldik7Cj4gPiAgCXN0 cnVjdCB0ZWdyYV9zbW11X2FzICphcyA9IHRvX3NtbXVfYXMoZG9tYWluKTsKPiA+IC0Jc3RydWN0 IGRldmljZV9ub2RlICpucCA9IGRldi0+b2Zfbm9kZTsKPiA+IC0Jc3RydWN0IG9mX3BoYW5kbGVf YXJncyBhcmdzOwo+ID4gIAl1bnNpZ25lZCBpbnQgaW5kZXggPSAwOwo+ID4gIAlpbnQgZXJyID0g MDsKPiA+ICAKPiA+IC0Jd2hpbGUgKCFvZl9wYXJzZV9waGFuZGxlX3dpdGhfYXJncyhucCwgImlv bW11cyIsICIjaW9tbXUtY2VsbHMiLCBpbmRleCwKPiA+IC0JCQkJCSAgICZhcmdzKSkgewo+ID4g LQkJdW5zaWduZWQgaW50IHN3Z3JvdXAgPSBhcmdzLmFyZ3NbMF07Cj4gPiAtCj4gPiAtCQlpZiAo YXJncy5ucCAhPSBzbW11LT5kZXYtPm9mX25vZGUpIHsKPiA+IC0JCQlvZl9ub2RlX3B1dChhcmdz Lm5wKTsKPiA+IC0JCQljb250aW51ZTsKPiA+IC0JCX0KPiA+IC0KPiA+IC0JCW9mX25vZGVfcHV0 KGFyZ3MubnApOwo+ID4gKwlpZiAoIWZ3c3BlYyB8fCBmd3NwZWMtPm9wcyAhPSAmdGVncmFfc21t dV9vcHMpCj4gPiArCQlyZXR1cm4gLUVOT0VOVDsKPiAKPiBzLyZ0ZWdyYV9zbW11X29wcy9zbW11 LT5pb21tdS5vcHMvCj4gCj4gU2Vjb25kbHksIGlzIGl0IGV2ZW4gcG9zc2libGUgdGhhdCBmd3Nw ZWMgY291bGQgYmUgTlVMTCBoZXJlIG9yIHRoYXQKPiBmd3NwZWMtPm9wcyAhPSBzbW11LT5vcHM/ CgpJIGFtIGZvbGxvd2luZyB3aGF0J3MgaW4gdGhlIGFybS1zbW11IGRyaXZlciwgYXMgSSB0aGlu ayBpdCdkIGJlCmEgY29tbW9uIHByYWN0aWNlIHRvIGRvIHN1Y2ggYSBjaGVjayBpbiBzdWNoIGEg d2F5LgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21t dSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9s aXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vaW9tbXU=