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Fri, 15 Jan 2021 03:21:09 -0800 (PST) Date: Fri, 15 Jan 2021 11:21:07 +0000 From: Lee Jones To: Huang Rui Subject: Re: [PATCH] drm/amd/display: fix the system memory page fault because of copy overflow Message-ID: <20210115112107.GI3975472@dell> References: <20210115184658.513045-1-ray.huang@amd.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210115184658.513045-1-ray.huang@amd.com> X-Mailman-Approved-At: Fri, 15 Jan 2021 15:08:45 +0000 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alex Deucher , Jinzhou Su , changfeng.zhu@amd.com, amd-gfx@lists.freedesktop.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" T24gU2F0LCAxNiBKYW4gMjAyMSwgSHVhbmcgUnVpIHdyb3RlOgoKPiBUaGUgYnVmZmVyIGlzIGFs bG9jYXRlZCB3aXRoIHRoZSBzaXplIG9mIHBvaW50ZXIgYW5kIGNvcHkgd2l0aCB0aGUgc2l6ZSBv Zgo+IGRhdGEgc3RydWN0dXJlLiBUaGVuIHRyaWdnZXIgdGhlIHN5c3RlbSBtZW1vcnkgcGFnZSBm YXVsdC4gVXNlIHRoZQo+IG9yaWduYWwgZGF0YSBzdHJ1Y3R1cmUgdG8gZ2V0IHRoZSBvYmplY3Qg c2l6ZS4KPiAKPiBGaXhlczogYThlMzAwMDViIGRybS9hbWQvZGlzcGxheS9kYy9jb3JlL2RjX2xp bms6IE1vdmUgc29tZSBsb2NhbCBkYXRhCj4gZnJvbSB0aGUgc3RhY2sgdG8gdGhlIGhlYXAKPiAK PiBTaWduZWQtb2ZmLWJ5OiBIdWFuZyBSdWkgPHJheS5odWFuZ0BhbWQuY29tPgo+IENjOiBMZWUg Sm9uZXMgPGxlZS5qb25lc0BsaW5hcm8ub3JnPgo+IC0tLQo+ICBkcml2ZXJzL2dwdS9kcm0vYW1k L2Rpc3BsYXkvZGMvY29yZS9kY19saW5rLmMgfCA0ICsrLS0KPiAgMSBmaWxlIGNoYW5nZWQsIDIg aW5zZXJ0aW9ucygrKSwgMiBkZWxldGlvbnMoLSkKPiAKPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9n cHUvZHJtL2FtZC9kaXNwbGF5L2RjL2NvcmUvZGNfbGluay5jIGIvZHJpdmVycy9ncHUvZHJtL2Ft ZC9kaXNwbGF5L2RjL2NvcmUvZGNfbGluay5jCj4gaW5kZXggNjk1NzNkNjcwNTZkLi43MzE3ODk3 OGFlNzQgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUvZHJtL2FtZC9kaXNwbGF5L2RjL2NvcmUv ZGNfbGluay5jCj4gKysrIGIvZHJpdmVycy9ncHUvZHJtL2FtZC9kaXNwbGF5L2RjL2NvcmUvZGNf bGluay5jCj4gQEAgLTEzODAsNyArMTM4MCw3IEBAIHN0YXRpYyBib29sIGRjX2xpbmtfY29uc3Ry dWN0KHN0cnVjdCBkY19saW5rICpsaW5rLAo+ICAKPiAgCURDX0xPR0dFUl9JTklUKGRjX2N0eC0+ bG9nZ2VyKTsKPiAgCj4gLQlpbmZvID0ga3phbGxvYyhzaXplb2YoaW5mbyksIEdGUF9LRVJORUwp OwoKQWggc29ycnksIHRoaXMgc2hvdWxkIGJlICgqaW5mbykuCgo+ICsJaW5mbyA9IGt6YWxsb2Mo c2l6ZW9mKHN0cnVjdCBpbnRlZ3JhdGVkX2luZm8pLCBHRlBfS0VSTkVMKTsKClVzaW5nIHRoZSBm dWxsIG5hbWUgbGlrZSB0aGlzIGlzIHVzdWFsbHkgZGlzY291cmFnZWQuCgo+ICAJaWYgKCFpbmZv KQo+ICAJCWdvdG8gY3JlYXRlX2ZhaWw7Cj4gIAo+IEBAIC0xNTQ1LDcgKzE1NDUsNyBAQCBzdGF0 aWMgYm9vbCBkY19saW5rX2NvbnN0cnVjdChzdHJ1Y3QgZGNfbGluayAqbGluaywKPiAgCX0KPiAg Cj4gIAlpZiAoYmlvcy0+aW50ZWdyYXRlZF9pbmZvKQo+IC0JCW1lbWNweShpbmZvLCBiaW9zLT5p bnRlZ3JhdGVkX2luZm8sIHNpemVvZigqaW5mbykpOwoKVGhpcyBzaG91bGQgYmUgY29ycmVjdC4K Cj4gKwkJbWVtY3B5KGluZm8sIGJpb3MtPmludGVncmF0ZWRfaW5mbywgc2l6ZW9mKHN0cnVjdCBp bnRlZ3JhdGVkX2luZm8pKTsKPiAgCj4gIAkvKiBMb29rIGZvciBjaGFubmVsIG1hcHBpbmcgY29y cmVzcG9uZGluZyB0byBjb25uZWN0b3IgYW5kIGRldmljZSB0YWcgKi8KPiAgCWZvciAoaSA9IDA7 IGkgPCBNQVhfTlVNQkVSX09GX0VYVF9ESVNQTEFZX1BBVEg7IGkrKykgewoKLS0gCkxlZSBKb25l cyBb5p2O55C85pavXQpTZW5pb3IgVGVjaG5pY2FsIExlYWQgLSBEZXZlbG9wZXIgU2VydmljZXMK TGluYXJvLm9yZyDilIIgT3BlbiBzb3VyY2Ugc29mdHdhcmUgZm9yIEFybSBTb0NzCkZvbGxvdyBM aW5hcm86IEZhY2Vib29rIHwgVHdpdHRlciB8IEJsb2cKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KYW1kLWdmeCBtYWlsaW5nIGxpc3QKYW1kLWdmeEBsaXN0 cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9s aXN0aW5mby9hbWQtZ2Z4Cg==