From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr760117.outbound.protection.outlook.com ([40.107.76.117]:23319 "EHLO NAM02-CY1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725991AbeKMLO3 (ORCPT ); Tue, 13 Nov 2018 06:14:29 -0500 From: Trent Piepho To: "marc.zyngier@arm.com" , "lorenzo.pieralisi@arm.com" , "gustavo.pimentel@synopsys.com" CC: "joao.pinto@synopsys.com" , "jingoohan1@gmail.com" , "linux-pci@vger.kernel.org" , "faiz_abbas@ti.com" , "stable@vger.kernel.org" , "bhelgaas@google.com" , "vigneshr@ti.com" Subject: Re: [PATCH] PCI: dwc: Fix interrupt race in when handling MSI Date: Tue, 13 Nov 2018 01:18:41 +0000 Message-ID: <1542071920.30311.411.camel@impinj.com> References: <20181027000028.21343-1-tpiepho@impinj.com> <20181106145347.GB19060@e107981-ln.cambridge.arm.com> <1541533217.30311.263.camel@impinj.com> <597d9ebd-f95f-0a4d-e1a3-fe79d4333879@arm.com> <1541621853.30311.294.camel@impinj.com> <268eae88-274e-edfe-5668-5759efae62e6@arm.com> <1541706591.30311.308.camel@impinj.com> In-Reply-To: Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: T24gVHVlLCAyMDE4LTExLTEzIGF0IDAwOjQxICswMDAwLCBHdXN0YXZvIFBpbWVudGVsIHdyb3Rl Og0KPiBPbiAwOS8xMS8yMDE4IDExOjM0LCBNYXJjIFp5bmdpZXIgd3JvdGU6DQo+ID4gDQo+ID4g R3VzdGF2bywgaGVyZSdzIG9uZSBzaW1wbGUgYXNrLiBQbGVhc2UgcmVwbHkgdG8gdGhpcyBlbWFp bCB3aXRoIGEgc3RlcA0KPiA+IGJ5IHN0ZXAsIHJlZ2lzdGVyIGJ5IHJlZ2lzdGVyIGRlc2NyaXB0 aW9uIG9mIGhvdyBhbiBNU0kgbXVzdCBiZSBoYW5kbGVkDQo+ID4gb24gdGhpcyBIVy4gV2UgZG8g bmVlZCBpdCwgYW5kIHdlIG5lZWQgaXQgbm93Lg0KPiANCj4gSGkgTWFyYywgSSB0aG91Z2h0IHRo YXQgSSBkaWQgcmVzcG9uZCB0byB5b3VyIHF1ZXN0aW9uIG9uIE5vdiA4LiBIb3dldmVyIEkgd2ls bA0KPiByZXBlYXQgaXQgYW5kIGFkZCBzb21lIGV4dHJhIGluZm9ybWF0aW9uIHRvIGl0IG5vdy4N Cj4gDQo+IEFib3V0IHRoZSByZWdpc3RlcnM6DQo+IA0KPiBQQ0lFX01TSV9JTlRSMF9NQVNLDQo+ IFdoZW4gYW4gTVNJIGlzIHJlY2VpdmVkIGZvciBhIG1hc2tlZCBpbnRlcnJ1cHQsIHRoZSBjb3Jy ZXNwb25kaW5nIHN0YXR1cyBiaXQNCj4gZ2V0cyBzZXQgaW4gdGhlIGludGVycnVwdCBzdGF0dXMg cmVnaXN0ZXIgYnV0IHRoZSBjb250cm9sbGVyIHdpbGwgbm90IHNpZ25hbCBpdC4NCj4gQXMgc29v biBhcyB0aGUgbWFza2VkIGludGVycnVwdCBpcyB1bm1hc2tlZCBhbmQgYXNzdW1pbmcgdGhlIHN0 YXR1cyBiaXQgaXMgc3RpbGwNCj4gc2V0IHRoZSBjb250cm9sbGVyIHdpbGwgc2lnbmFsIGl0Lg0K PiANCj4gUENJRV9NU0lfSU5UUjBfRU5BQkxFDQo+IEVuYWJsZXMvZGlzYWJsZXMgZXZlcnkgaW50 ZXJydXB0LiBXaGVuIGFuIE1TSSBpcyByZWNlaXZlZCBmcm9tIGEgZGlzYWJsZWQNCj4gaW50ZXJy dXB0LCBubyBzdGF0dXMgYml0IGdldHMgc2V0IGluIE1TSSBjb250cm9sbGVyIGludGVycnVwdCBz dGF0dXMgcmVnaXN0ZXIuDQoNCklmIHRoZSBNU0kgaXMgdW5tYXNrZWQgYW5kIHRoZSBzdGF0dXMg Yml0IGlzIHN0aWxsIHNldCwgKm5vdCogZnJvbSBhDQpuZXcgTVNJIGJ1dCByYXRoZXIgZnJvbSBv bmUgdGhhdCBhcnJpdmVkIGJlZm9yZSB0aGUgTVNJIHdhcyBtYXNrZWQsDQpkb2VzIHRoZSBjb250 cm9sbGVyIHN0aWxsIHNpZ25hbCBpdD8NCg0KSSB3b3VsZCBzdXNwZWN0IHRoZSBhbnN3ZXIgaXMg bm86IG9ubHkgYSBuZXcgTVNJIHdpbGwgY2F1c2UgdGhlDQppbnRlcnJ1cHQgYmUgc2lnbmFsZWQg b24gdW5tYXNrLiAgQW5kIHRoZW4gb25seSBpZiB0aGUgc3RhdHVzIGJpdCBoYXMNCm5vdCBiZWVu IGNsZWFyZWQgYmVmb3JlIHRoZSB1bm1hc2sgKGFzIHlvdSBzdGF0ZWQgYWxyZWFkeSkuDQoNCkJ1 dCBmb3IgdGhhdCB0byBiZSB0aGUgY2FzZSwgdGhlcmUgbXVzdCBiZSBhbm90aGVyIGJpdCBvZiBp bnRlcnJ1cHQNCnN0YXR1cyAoaS5lLiwgInBlbmRpbmciKSB0aGF0IHdlIGRvbid0IGtub3cgYWJv dXQgeWV0LiAgVGhlIGJpdCBpbiB0aGUNCnN0YXR1cyByZWdpc3RlciBhbG9uZSBpcyBub3QgZW5v dWdoLg0KDQpUaGlzIHBlbmRpbmcgYml0IHdvdWxkIG5lZWQgdG8gYmUgc2V0IG9uIGEgMC0+MSB0 cmFuc2l0aW9uIG9mIHRoZQ0Kc3RhdHVzIGJpdC4gIEFuIE1TSSBhcnJpdmluZyB3aGlsZSB0aGUg c3RhdHVzIGJpdCBpcyBhbHJlYWR5IDEgZG9lcyBub3QNCnRyaWdnZXIgYSBuZXcgaW50ZXJydXB0 Lg0KDQo+IEFib3V0IHRoaXMgbmV3IGNhbGxiYWNrczoNCj4gDQo+IFRoZSBkd19wY2lfYm90dG9t X21hc2soKSBhbmQgZHdfcGNpX2JvdHRvbV91bm1hc2soKSBjYWxsYmFja3Mgd2VyZSBhZGRlZCBv bg0KPiBMaW51eCBrZXJuZWwgdjQuMTcgb24gUENJOiBkd2M6IE1vdmUgTVNJIElSUXMgYWxsb2Nh dGlvbiB0byBJUlEgZG9tYWlucw0KPiBoaWVyYXJjaGljYWwgQVBJIHBhdGNoIFsxXSBhbmQgYmFz ZWQgb24gd2hhdCBJJ3ZlIHNlZW4gc28gZmFyLCBiZWZvcmUgdGhpcyBwYXRjaA0KPiB0aGVyZSB3 ZXJlIG5vIGludGVycnVwdCBtYXNraW5nIGJlZW4gcGVyZm9ybWVkLg0KDQpZZXMuICBPciByYXRo ZXIsIHRoZSBzdGF0dXMgYml0IGJlaW5nIHNldCBlZmZlY3RpdmVseSBtYXNrcyB0aGUNCmludGVy cnVwdC4NCg0KPiBCYXNlZCBvbiB0aGUgaW5mb3JtYXRpb24gcHJvdmlkZWQsIGl0cyB2ZXJ5IGxp a2VseSB0aGF0IEkgc2hvdWxkIHVzZSB0aGUNCj4gUENJRV9NU0lfSU5UUjBfTUFTSyByZWdpc3Rl ciBpbnN0ZWFkIG9mIFBDSUVfTVNJX0lOVFIwX0VOQUJMRSBvbiB0aGUNCj4gZHdfcGNpX2JvdHRv bV9tYXNrKCkgYW5kIGR3X3BjaV9ib3R0b21fdW5tYXNrKCkgY2FsbGJhY2tzLiBBcyBzb29uIGFz IEkgcmV0dXJuDQo+IGZyb20gTGludXggcGx1bWJlcnMgY29uZmVyZW5jZSwgSSB3aWxsIHRlc3Qg dGhlIHN5c3RlbSB1c2luZyB0aGUNCj4gUENJRV9NU0lfSU5UUjBfTUFTSyByZWdpc3Rlci4NCg0K VXNpbmcgZW5hYmxlIHRvIG1hc2sgdGhlIGludGVycnVwdCBpcyBicm9rZW4uICBJdCB3aWxsIGFs bG93IGFuIE1TSSB0bw0KYmUgbG9zdCBpZiBpdCBhcnJpdmVzIHdoaWxlIHRoZSBNU0kgaW4gbm90 IGVuYWJsZWQuICBJdCBpcyBpbXBvc3NpYmxlDQp0byBwcmV2ZW50IHRoYXQgZnJvbSByYWNpbmcg YWdhaW5zdCB0aGUgcGNpIGRldmljZSBkcml2ZXIncyBmaW5hbCBjaGVjaw0KdGhhdCBubyBNU0kt c2lnbmFsZWQgY29uZGl0aW9uIGluIHRoZSBoYXJkd2FyZSBpcyBwcmVzZW50Lg==