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[216.228.112.22]) by smtp.gmail.com with ESMTPSA id f18sm2818497pfe.153.2020.10.02.11.07.17 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Fri, 02 Oct 2020 11:07:17 -0700 (PDT) Date: Fri, 2 Oct 2020 11:01:21 -0700 From: Nicolin Chen To: Dmitry Osipenko Subject: Re: [PATCH v4 2/3] iommu/tegra-smmu: Rework tegra_smmu_probe_device() Message-ID: <20201002180120.GB29706@Asurada-Nvidia> References: <20201002060807.32138-1-nicoleotsuka@gmail.com> <20201002060807.32138-3-nicoleotsuka@gmail.com> <070a13b2-cde2-ab9e-7ee0-8fb71fb64d5d@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <070a13b2-cde2-ab9e-7ee0-8fb71fb64d5d@gmail.com> User-Agent: Mutt/1.9.4 (2018-02-28) Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.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" T24gRnJpLCBPY3QgMDIsIDIwMjAgYXQgMDU6MjM6MTRQTSArMDMwMCwgRG1pdHJ5IE9zaXBlbmtv IHdyb3RlOgo+IDAyLjEwLjIwMjAgMDk6MDgsIE5pY29saW4gQ2hlbiDQv9C40YjQtdGCOgo+ID4g IHN0YXRpYyBzdHJ1Y3QgaW9tbXVfZGV2aWNlICp0ZWdyYV9zbW11X3Byb2JlX2RldmljZShzdHJ1 Y3QgZGV2aWNlICpkZXYpCj4gPiAgewo+ID4gLQlzdHJ1Y3QgZGV2aWNlX25vZGUgKm5wID0gZGV2 LT5vZl9ub2RlOwo+ID4gLQlzdHJ1Y3QgdGVncmFfc21tdSAqc21tdSA9IE5VTEw7Cj4gPiAtCXN0 cnVjdCBvZl9waGFuZGxlX2FyZ3MgYXJnczsKPiA+IC0JdW5zaWduZWQgaW50IGluZGV4ID0gMDsK PiA+IC0JaW50IGVycjsKPiA+IC0KPiA+IC0Jd2hpbGUgKG9mX3BhcnNlX3BoYW5kbGVfd2l0aF9h cmdzKG5wLCAiaW9tbXVzIiwgIiNpb21tdS1jZWxscyIsIGluZGV4LAo+ID4gLQkJCQkJICAmYXJn cykgPT0gMCkgewo+ID4gLQkJc21tdSA9IHRlZ3JhX3NtbXVfZmluZChhcmdzLm5wKTsKPiA+IC0J CWlmIChzbW11KSB7Cj4gPiAtCQkJZXJyID0gdGVncmFfc21tdV9jb25maWd1cmUoc21tdSwgZGV2 LCAmYXJncyk7Cj4gPiAtCQkJb2Zfbm9kZV9wdXQoYXJncy5ucCk7Cj4gPiAtCj4gPiAtCQkJaWYg KGVyciA8IDApCj4gPiAtCQkJCXJldHVybiBFUlJfUFRSKGVycik7Cj4gPiAtCj4gPiAtCQkJLyoK PiA+IC0JCQkgKiBPbmx5IGEgc2luZ2xlIElPTU1VIG1hc3RlciBpbnRlcmZhY2UgaXMgY3VycmVu dGx5Cj4gPiAtCQkJICogc3VwcG9ydGVkIGJ5IHRoZSBMaW51eCBrZXJuZWwsIHNvIGFib3J0IGFm dGVyIHRoZQo+ID4gLQkJCSAqIGZpcnN0IG1hdGNoLgo+ID4gLQkJCSAqLwo+ID4gLQkJCWRldl9p b21tdV9wcml2X3NldChkZXYsIHNtbXUpOwo+ID4gLQo+ID4gLQkJCWJyZWFrOwo+ID4gLQkJfQo+ ID4gLQo+ID4gLQkJb2Zfbm9kZV9wdXQoYXJncy5ucCk7Cj4gPiAtCQlpbmRleCsrOwo+ID4gLQl9 Cj4gPiArCXN0cnVjdCB0ZWdyYV9zbW11ICpzbW11ID0gZGV2X2lvbW11X3ByaXZfZ2V0KGRldik7 Cj4gPiAgCj4gPiAgCWlmICghc21tdSkKPiA+ICAJCXJldHVybiBFUlJfUFRSKC1FTk9ERVYpOwo+ IAo+IFRoZSAhc21tdSBjYW4ndCBldmVyIGJlIHRydWUgbm93LCBpc24ndCBpdD8gVGhlbiBwbGVh c2UgcmVtb3ZlIGl0LgoKSG93IGNhbiB5b3UgYmUgc28gc3VyZT8gSGF2ZSB5b3UgcmVhZCBteSBj b21taXQgbWVzc2FnZT8gVGhlIHdob2xlCnBvaW50IG9mIHJlbW92aW5nIHRoZSBoYWNrIGluIHRl Z3JhX3NtbXVfcHJvYmUoKSBpcyB0byByZXR1cm4gdGhlCkVSUl9QVFIoLUVOT0RFVikgaGVyZS4g VGhlIGJ1c19zZXRfaW9tbXUoKSB3aWxsIGNhbGwgdGhpcyBmdW5jdGlvbgp3aGVuIG1jLT5zbW11 IGlzIG5vdCBhc3NpZ25lZCBpdCwgYXMgaXQncyBhc3NpZ25lZCBhZnRlciB3ZSByZXR1cm4KdGVn cmFfc21tdV9wcm9iZSgpIHdoaWxlIGJ1c19zZXRfaW9tbXUoKSBpcyBzdGlsbCBpbiB0aGUgbWlk ZGxlIG9mCnRoZSB0ZWdyYV9zbW11X3Byb2JlKCkuCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51 eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1h bi9saXN0aW5mby9pb21tdQ==