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b=B9tlb1O7jbTOkBZh0+L/dMVuqQVsH5U+Wy/XX47i0cD6T/QRklmp/GNNT2/XtMP80 3YL4FQgWuyrs5jvAHOJ9wyD+9N8FSJuWyY9WB3ZBjYaGpF8NfjjoXsl0p/SNP+aHXg kVtja0B7ictQY+Ue96WUtQmr2jmfLVjdQ5uYIVO/bSWuuJb/TjurGkOd+Qg++4JSfz tiRGlwp/7c9UF6/tOnLRgds404eejjbY3Vu6zAP7SfsZdJUeHKHyyX6eQx/9U/peRZ 3hH4JYTMV8EfDtL2desisfGwrWGJKryttrAQEFp/VLXW3nsV5en8Q+KXKzc1Ez9XMa gNs3HBK7H8XlQ== Date: Mon, 19 Jun 2023 11:07:24 +0200 From: Lorenzo Pieralisi To: Hongxing Zhu Cc: Bjorn Helgaas , "l.stach@pengutronix.de" , "bhelgaas@google.com" , "linux-pci@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "kernel@pengutronix.de" , dl-linux-imx , Serge Semin Subject: Re: [PATCH v2] PCI: imx6: Save and restore MSI control of RC in suspend and resume Message-ID: References: <20230317222436.GA1978818@bhelgaas> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230619_020735_832235_D338BB41 X-CRM114-Status: GOOD ( 28.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gTW9uLCBBcHIgMTAsIDIwMjMgYXQgMDY6NDg6NDhBTSArMDAwMCwgSG9uZ3hpbmcgWmh1IHdy b3RlOgoKWy4uLl0KCj4gPiBJIGFtIGdldHRpbmcgYmFjayB0byB0aGlzIHNpbmNlIEkgYW0gc3Rp bGwgbm90IGNvbnZpbmNlZCBhbmQgSSB3YW50IHRvIHVuZGVyc3RhbmQKPiA+IHRoaXMgb25jZSBm b3IgYWxsLgo+ID4gCj4gPiBXZSBkbyB1c2UgZHdfcGNpZV9maW5kX2NhcGFiaWxpdHkoKSBpbiBt b3N0IERXQyBkcml2ZXJzIHRvIGZpbmQgYW5kIHBlZWsvcG9rZQo+ID4gYXQgZWcgUENJIGV4cHJl c3MgY2FwYWJpbGl0eSBvZiB0aGUgKlJvb3QgcG9ydCogKD8pLAo+ID4gCj4gPiBlZyBkd19wY2ll X3dhaXRfZm9yX2xpbmsoKQo+ID4gCj4gPiBzbyBJIGFzc3VtZSB0aGF0IGZvciBpTVg2IGR3X3Bj aWVfZmluZF9jYXBhYmlsaXR5KCkgZG9lcyBqdXN0IHRoZSBzYW1lLCB3aGljaAo+ID4gd291bGQg bWVhbiB0aGF0IHdlIGFyZSBwb2tpbmcgdGhlICJNZXNzYWdlIENvbnRyb2wiIGZpZWxkIG9mIHRo ZSBSb290IHBvcnQgTVNJCj4gPiBjYXBhYmlsaXR5Lgo+ID4gCj4gPiBFaXRoZXIgdGhhdCAod2hp Y2ggd291bGQgbWVhbiB0aGF0IGlNWDYgaGFzIGEgSFcgYnVnIGJlY2F1c2UgdGhlIFJQIE1lc3Nh Z2UKPiA+IENvbnRyb2wgZmllbGQgZG9lcyBub3QgY29udHJvbCB0aGUgZGVsaXZlcnkgb2YgTVNJ cyBmcm9tIGVuZHBvaW50cyBidXQganVzdCBmb3IgdGhlCj4gPiByb290IHBvcnQgaXRzZWxmICkg b3IgYWxsIERXQyBjb250cm9sbGVycyBtb2RlbGxlZCB0aGUgcm9vdCBjb21wbGV4IE1NSU8gc3Bh Y2UgYXMKPiA+IGEgc2V0IG9mIFBDSS9QQ0llIGNhcGFiaWxpdGllcyB0aGF0IGFyZSBOT1QgbmVj ZXNzYXJpbHkgbWFwcGFibGUgdG8gUENJCj4gPiBzcGVjaWZpY2F0aW9ucyBkZWZpbmVkIG9uZXMu Cj4gPiAKPiA+IENhbiBhbnlvbmUgcGxlYXNlIHNoZWQgc29tZSBsaWdodCBvbiB0aGlzID8gSSBk b24ndCBoYXZlIERXQyBIVywgd2UgbmVlZCB0bwo+ID4ga25vdyBiZWZvcmUgbWVyZ2luZyB0aGlz IGNvZGUuCj4gSGkgTG9yZW56bzoKPiBSZWdhcmRpbmcgbXkgdW5kZXJzdGFuZGluZywgRFdDIEhX IGhhcyB0aGUgUENJL1BDSWUgY2FwYWJpbGl0eSBtYXAgd2hlbgo+ICBpdCB3b3JrcyBpbiBSQyBt b2RlIGFuZCBTcGVjIGRvZXNu4oCZdCBzcGVjaWZ5IHRoZXNlIENhcHMgZm9yIGhvc3QgY29udHJv bGxlci4KPiBBbmQsIHRoZXJlIGFyZSBjb21tZW50cyBkZXNjcmliZSB0aGVzZSBjYWxsYmFja3Mg YWxyZWFkeSBpbiBwY2llLWRlc2lnbndhcmUuYy4KPiAuLi4KPiAvKgo+ICAqIFRoZXNlIGludGVy ZmFjZXMgcmVzZW1ibGUgdGhlIHBjaV9maW5kXypjYXBhYmlsaXR5KCkgaW50ZXJmYWNlcywgYnV0 IHRoZXNlCj4gICogYXJlIGZvciBjb25maWd1cmluZyBob3N0IGNvbnRyb2xsZXJzLCB3aGljaCBh cmUgYnJpZGdlcyAqdG8qIFBDSSBkZXZpY2VzIGJ1dAo+ICAqIGFyZSBub3QgUENJIGRldmljZXMg dGhlbXNlbHZlcy4KPiAgKi8KPiBzdGF0aWMgdTggX19kd19wY2llX2ZpbmRfbmV4dF9jYXAoc3Ry dWN0IGR3X3BjaWUgKnBjaSwgdTggY2FwX3B0ciwKPiAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgdTggY2FwKQo+IC4uLgo+IAo+IAoKSSBzdGlsbCBiZWxpZXZlIHRoaXMgaXMgYW4g aW50ZWdyYXRpb24gYnVnLCBtb3JlIHNvIGFmdGVyIHJlYWRpbmcgdGhlCmNvbW1pdCBTZXJnZSBw b2ludGVkIG91dDoKCjc1Y2I4ZDIwYzExMiAoIlBDSTogaW14OiBFbmFibGUgTVNJIGZyb20gZG93 bnN0cmVhbSBjb21wb25lbnRzIikuCgpUaGUgY29tbWl0IGFib3ZlIGltcGxpZXMgdGhhdCBpZiB5 b3UgaGF2ZSBDT05GSUdfUENJRVBPUlRCVVMgZW5hYmxlZCwKeW91IHdvdWxkIG5vdCBuZWVkIHRv IHNldCB0aGUgTVNJIGVuYWJsZSBiaXQgZXhwbGljaXRseSBiZWNhdXNlIHRoYXQncwpkb25lIGJ5 IHRoZSBwb3J0IGRyaXZlciB3aGlsZSByZXF1ZXN0aW5nIFJQIHNlcnZpY2VzLgoKVGhpcyBtZWFu cyB0aGF0IGl0IGlzIF9zZWVuXyBieSB0aGUgUENJIGNvcmUgYXMgYSBjYXBhYmlsaXR5IHJlZ2lz dGVyCmFuZCBpdCBhbHNvIG1lYW5zIHRoYXQgaWYgeW91IGhhdmUgQ09ORklHX1BDSUVQT1JUQlVT IGVuYWJsZWQgYW5kIHRoYXQKdGhlIHBvcnQgZHJpdmVyIGRpc2FibGVzIE1TSXMsIGFsbCBkb3du c3RyZWFtIE1TSXMgYXJlIGRpc2FibGVkLCBub3QKb25seSB0aGUgUlAgb25lcyAoYXMgaXQgc2hv dWxkIGJlIGFjY29yZGluZyB0byB0aGUgUENJIHNwZWNzKS4KClNvLCB0aGlzIGlzIGEgSFcgYnVn IEkgYW0gYWZyYWlkIC0gSSB3aWxsIG1lcmdlIHRoaXMgcGF0Y2ggYnV0IEFGQUlDUwp0aGUgSFcg aW50ZWdyYXRpb24gYnVnIGlzIHRoZXJlIHJlZ2FyZGxlc3MsIGhvd2V2ZXIgd2Ugc2xpY2UgaXQu CgpUaGFua3MsCkxvcmVuem8KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxA bGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xp c3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK