From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: "Stephen Bates" To: Dan Williams , Logan Gunthorpe CC: Linux Kernel Mailing List , "linux-pci@vger.kernel.org" , "linux-nvme@lists.infradead.org" , linux-rdma , linux-nvdimm , "linux-block@vger.kernel.org" , "Christoph Hellwig" , Jens Axboe , Keith Busch , Sagi Grimberg , Bjorn Helgaas , Jason Gunthorpe , Max Gurtovoy , =?utf-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Benjamin Herrenschmidt , Alex Williamson , =?utf-8?B?Q2hyaXN0aWFuIEvDtm5pZw==?= Subject: Re: [PATCH v4 04/14] PCI/P2PDMA: Clear ACS P2P flags for all devices behind switches Date: Tue, 8 May 2018 14:44:43 +0000 Message-ID: <64C231F5-DE36-415F-B308-3A423B0BBACB@raithlin.com> References: <20180423233046.21476-1-logang@deltatee.com> <20180423233046.21476-5-logang@deltatee.com> In-Reply-To: Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: SGkgRGFuDQoNCj4gICAgSXQgc2VlbXMgdW53aWVsZHkgdGhhdCB0aGlzIGlzIGEgY29tcGlsZSB0 aW1lIG9wdGlvbiBhbmQgbm90IGEgcnVudGltZQ0KPiAgICBvcHRpb24uIENhbid0IHdlIGhhdmUg YSBrZXJuZWwgY29tbWFuZCBsaW5lIG9wdGlvbiB0byBvcHQtaW4gdG8gdGhpcw0KPiAgICBiZWhh dmlvciByYXRoZXIgdGhhbiByZXF1aXJlIGEgd2hvbGx5IHNlcGFyYXRlIGtlcm5lbCBpbWFnZT8N CiAgDQpJIHRoaW5rIGJlY2F1c2Ugb2YgdGhlIHNlY3VyaXR5IGltcGxpY2F0aW9ucyBhc3NvY2lh dGVkIHdpdGggcDJwZG1hIGFuZCBBQ1Mgd2Ugd2FudGVkIHRvIG1ha2UgaXQgdmVyeSBjbGVhciBw ZW9wbGUgd2VyZSBjaG9vc2luZyBvbmUgKHAycGRtYSkgb3IgdGhlIG90aGVyIChJT01NVSBncm91 cGluZ3MgYW5kIGlzb2xhdGlvbikuIEhvd2V2ZXIgcGVyc29uYWxseSBJIHdvdWxkIHByZWZlciBp bmNsdWRpbmcgdGhlIG9wdGlvbiBvZiBhIHJ1bi10aW1lIGtlcm5lbCBwYXJhbWV0ZXIgdG9vLiBJ biBmYWN0IGEgZmV3IG1vbnRocyBhZ28gSSBwcm9wb3NlZCBhIHNtYWxsIHBhdGNoIHRoYXQgZGlk IGp1c3QgdGhhdCBbMV0uIEl0IG5ldmVyIHJlYWxseSB3ZW50IGFueXdoZXJlIGJ1dCBpZiBwZW9w bGUgd2VyZSBvcGVuIHRvIHRoZSBpZGVhIHdlIGNvdWxkIGxvb2sgYXQgYWRkaW5nIGl0IHRvIHRo ZSBzZXJpZXMuDQogIA0KPiBXaHkgaXMgdGhpcyB0ZXh0IGFkZGVkIGluIGEgZm9sbG93IG9uIHBh dGNoIGFuZCBub3QgdGhlIHBhdGNoIHRoYXQNCj4gIGludHJvZHVjZWQgdGhlIGNvbmZpZyBvcHRp b24/DQoNCkJlY2F1c2UgdGhlIEFDUyBzZWN0aW9uIHdhcyBhZGRlZCBsYXRlciBpbiB0aGUgc2Vy aWVzIGFuZCB0aGlzIGluZm9ybWF0aW9uIGlzIGFzc29jaWF0ZWQgd2l0aCB0aGF0IGFkZGl0aW9u YWwgZnVuY3Rpb25hbGl0eS4NCiAgICANCj4gSSdtIGFsc28gd29uZGVyaW5nIGlmIHRoYXQgY29t bWFuZCBsaW5lIG9wdGlvbiBjYW4gdGFrZSBhICdidXMgZGV2aWNlDQo+IGZ1bmN0aW9uJyBhZGRy ZXNzIG9mIGEgc3dpdGNoIHRvIGxpbWl0IHRoZSBzY29wZSBvZiB3aGVyZSBBQ1MgaXMNCj4gZGlz YWJsZWQuDQoNCkJ5IHRoaXMgeW91IG1lYW4gdGhlIGFkZHJlc3MgZm9yIGVpdGhlciBhIFJQLCBE U1AsIFVTUCBvciBNRiBFUCBiZWxvdyB3aGljaCB3ZSBkaXNhYmxlIEFDUz8gV2UgY291bGQgZG8g dGhhdCBidXQgSSBkb24ndCB0aGluayBpdCBhdm9pZHMgdGhlIGlzc3VlIG9mIGNoYW5nZXMgaW4g SU9NTVUgZ3JvdXBpbmdzIGFzIGRldmljZXMgYXJlIGFkZGVkL3JlbW92ZWQuIEl0IHNpbXBseSBj aGFuZ2VzIHRoZSBwcm9ibGVtIGZyb20gYWZmZWN0aW5nIGFuZCBlbnRpcmUgUENJIGRvbWFpbiB0 byBhIHN1Yi1zZXQgb2YgdGhlIGRvbWFpbi4gV2UgY2FuIGFscmVhZHkgaGFuZGxlIHRoaXMgYnkg ZG9pbmcgcDJwZG1hIG9uIG9uZSBSUCBhbmQgbm9ybWFsIElPTU1VIGlzb2xhdGlvbiBvbiB0aGUg b3RoZXIgUlBzIGluIHRoZSBzeXN0ZW0uDQoNClN0ZXBoZW4NCg0KWzFdIGh0dHBzOi8vbWFyYy5p bmZvLz9sPWxpbnV4LWRvYyZtPTE1MDkwNzE4ODMxMDgzOCZ3PTINCiAgICANCg0K