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Wed, 18 Mar 2020 19:11:05 +0000 MIME-Version: 1.0 Date: Wed, 18 Mar 2020 19:11:05 +0000 From: Marc Zyngier To: Sungbo Eo Subject: Re: [PATCH] irqchip/versatile-fpga: Handle chained IRQs properly In-Reply-To: References: <20200318170904.1461278-1-mans0n@gorani.run> <112cdab389aa9cc30189c7aec0baded2@kernel.org> Message-ID: <002b72cab9896fa5ac76a52e0cb503ff@kernel.org> X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.10 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: mans0n@gorani.run, linux-oxnas@groups.io, linus.walleij@linaro.org, tglx@linutronix.de, jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, narmstrong@baylibre.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200318_121108_031585_C035FE57 X-CRM114-Status: GOOD ( 17.14 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jason Cooper , Neil Armstrong , Linus Walleij , linux-kernel@vger.kernel.org, Thomas Gleixner , linux-oxnas@groups.io, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMjAyMC0wMy0xOCAxODoyMCwgU3VuZ2JvIEVvIHdyb3RlOgo+IEhpIE1hcmMsCj4gCj4gT24g MjAyMC0wMy0xOSAwMjo0OCwgTWFyYyBaeW5naWVyIHdyb3RlOgo+PiBIaSBTdW5nYm8sCj4+IAo+ PiBPbiAyMDIwLTAzLTE4IDE3OjA5LCBTdW5nYm8gRW8gd3JvdGU6Cj4+PiBFbmNsb3NlIHRoZSBj aGFpbmVkIGhhbmRsZXIgd2l0aCBjaGFpbmVkX2lycV97ZW50ZXIsZXhpdH0oKSwgc28gdGhhdCAK Pj4+IHRoZQo+Pj4gbXV4ZWQgaW50ZXJydXB0cyBnZXQgcHJvcGVybHkgYWNrZWQuCj4+PiAKPj4+ IFRoaXMgcGF0Y2ggYWxzbyBmaXhlcyBhIHJlYm9vdCBidWcgb24gT1g4MjAgU29DLCB3aGVyZSB0 aGUgamlmZmllcyAKPj4+IHRpbWVyCj4+PiBpbnRlcnJ1cHQgaXMgbmV2ZXIgYWNrZWQuIFRoZSBr ZXJuZWwgd2FpdHMgYSBjbG9jayB0aWNrIGZvcmV2ZXIgaW4KPj4+IGNhbGlicmF0ZV9kZWxheV9j b252ZXJnZSgpLCB3aGljaCBsZWFkcyB0byBhIGJvb3QgaGFuZy4KPj4gCj4+IE5pY2UgY2F0Y2gu Cj4+IAo+Pj4gCj4+PiBTaWduZWQtb2ZmLWJ5OiBTdW5nYm8gRW8gPG1hbnMwbkBnb3JhbmkucnVu Pgo+Pj4gQ2M6IE5laWwgQXJtc3Ryb25nIDxuYXJtc3Ryb25nQGJheWxpYnJlLmNvbT4KPj4+IC0t LQo+Pj4gwqBkcml2ZXJzL2lycWNoaXAvaXJxLXZlcnNhdGlsZS1mcGdhLmMgfCA5ICsrKysrKysr LQo+Pj4gwqAxIGZpbGUgY2hhbmdlZCwgOCBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4+ PiAKPj4+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2lycWNoaXAvaXJxLXZlcnNhdGlsZS1mcGdhLmMK Pj4+IGIvZHJpdmVycy9pcnFjaGlwL2lycS12ZXJzYXRpbGUtZnBnYS5jCj4+PiBpbmRleCA5Mjg4 NThkYWRhNzUuLjA4ZmFhYjJmZWMzZSAxMDA2NDQKPj4+IC0tLSBhL2RyaXZlcnMvaXJxY2hpcC9p cnEtdmVyc2F0aWxlLWZwZ2EuYwo+Pj4gKysrIGIvZHJpdmVycy9pcnFjaGlwL2lycS12ZXJzYXRp bGUtZnBnYS5jCj4+PiBAQCAtNiw2ICs2LDcgQEAKPj4+IMKgI2luY2x1ZGUgPGxpbnV4L2lycS5o Pgo+Pj4gwqAjaW5jbHVkZSA8bGludXgvaW8uaD4KPj4+IMKgI2luY2x1ZGUgPGxpbnV4L2lycWNo aXAuaD4KPj4+ICsjaW5jbHVkZSA8bGludXgvaXJxY2hpcC9jaGFpbmVkX2lycS5oPgo+Pj4gwqAj aW5jbHVkZSA8bGludXgvaXJxY2hpcC92ZXJzYXRpbGUtZnBnYS5oPgo+Pj4gwqAjaW5jbHVkZSA8 bGludXgvaXJxZG9tYWluLmg+Cj4+PiDCoCNpbmNsdWRlIDxsaW51eC9tb2R1bGUuaD4KPj4+IEBA IC02OCwxMiArNjksMTUgQEAgc3RhdGljIHZvaWQgZnBnYV9pcnFfdW5tYXNrKHN0cnVjdCBpcnFf ZGF0YSAqZCkKPj4+IAo+Pj4gwqBzdGF0aWMgdm9pZCBmcGdhX2lycV9oYW5kbGUoc3RydWN0IGly cV9kZXNjICpkZXNjKQo+Pj4gwqB7Cj4+PiArwqDCoMKgIHN0cnVjdCBpcnFfY2hpcCAqY2hpcCA9 IGlycV9kZXNjX2dldF9jaGlwKGRlc2MpOwo+Pj4gwqDCoMKgwqAgc3RydWN0IGZwZ2FfaXJxX2Rh dGEgKmYgPSBpcnFfZGVzY19nZXRfaGFuZGxlcl9kYXRhKGRlc2MpOwo+Pj4gwqDCoMKgwqAgdTMy IHN0YXR1cyA9IHJlYWRsKGYtPmJhc2UgKyBJUlFfU1RBVFVTKTsKPj4+IAo+Pj4gK8KgwqDCoCBj aGFpbmVkX2lycV9lbnRlcihjaGlwLCBkZXNjKTsKPj4+ICsKPj4gCj4+IEl0J3MgcHJvYmFibHkg bm90IGEgYmlnIGRlYWwsIGJ1dCBJJ20gbm90IGZvbmQgb2Ygc3RhcnRpbmcgdGFsa2luZyB0bwo+ PiB0aGUgbXV4aW5nIGlycWNoaXAgYmVmb3JlIGhhdmluZyBkb25lIHRoZSBjaGFpbmVkX2lycV9l bnRlcigpIGNhbGwuCj4+IAo+PiBNb3ZpbmcgdGhhdCByZWFkIGhlcmUgd291bGQgcHJvYmFibHkg YmUgc2FmZXIuCj4gCj4gT29wcywgSSBtaXNzZWQgaXQuIFRoYW5rcyBmb3IgcG9pbnRpbmcgaXQg b3V0Lgo+IAo+PiAKPj4+IMKgwqDCoMKgIGlmIChzdGF0dXMgPT0gMCkgewo+Pj4gwqDCoMKgwqDC oMKgwqDCoCBkb19iYWRfSVJRKGRlc2MpOwo+Pj4gLcKgwqDCoMKgwqDCoMKgIHJldHVybjsKPj4+ ICvCoMKgwqDCoMKgwqDCoCBnb3RvIG91dDsKPj4+IMKgwqDCoMKgIH0KPj4+IAo+Pj4gwqDCoMKg wqAgZG8gewo+Pj4gQEAgLTgyLDYgKzg2LDkgQEAgc3RhdGljIHZvaWQgZnBnYV9pcnFfaGFuZGxl KHN0cnVjdCBpcnFfZGVzYyAqZGVzYykKPj4+IMKgwqDCoMKgwqDCoMKgwqAgc3RhdHVzICY9IH4o MSA8PCBpcnEpOwo+Pj4gwqDCoMKgwqDCoMKgwqDCoCBnZW5lcmljX2hhbmRsZV9pcnEoaXJxX2Zp bmRfbWFwcGluZyhmLT5kb21haW4sIGlycSkpOwo+Pj4gwqDCoMKgwqAgfSB3aGlsZSAoc3RhdHVz KTsKPj4+ICsKPj4+ICtvdXQ6Cj4+PiArwqDCoMKgIGNoYWluZWRfaXJxX2V4aXQoY2hpcCwgZGVz Yyk7Cj4+PiDCoH0KPj4+IAo+Pj4gwqAvKgo+PiAKPj4gT3RoZXJ3aXNlIGxvb2tzIGdvb2QuIElm IHlvdSBzZW5kIGl0IGFnYWluIHdpdGggdGhlIGFib3ZlIGZpeGVkCj4+IGFuZCBhIEZpeGVzOiB0 YWcsIEknbGwgcXVldWUgaXQuCj4gCj4gSXQgc2VlbXMgdGhlIGhhbmRsZXIgaGFkIGJlZW4gYnJv a2VuIGZyb20gdGhlIHZlcnkgYmVnaW5uaW5nLiBDb3VsZAo+IHlvdSBnaXZlIG1lIGEgaGludCBv biBob3cgdGhlIHRhZyBzaG91bGQgYmUgbGlrZT8KCkluZGVlZCwgaXQgaGFzIGJlZW4gYnJva2Vu IGZvcmV2ZXIuIEknbSB0ZW1wdGVkIHRvIHNheToKCkZpeGVzOiBjNDFiMTZmOGM5ZDlkICgiQVJN OiBpbnRlZ3JhdG9yL3ZlcnNhdGlsZTogY29uc29saWRhdGUgRlBHQSBJUlEgCmhhbmRsaW5nIGNv ZGUiKQoKZXZlbiBpZiBpdCBwcm9iYWJseSBwcmVkYXRlcyB0aGUgaW50cm9kdWN0aW9uIG9mIHRo ZSBjaGFpbmVkX2lycV9lbnRlcigpIApoZWxwZXJzLgpUaGlzIHdpbGwgZW5zdXJlIHRoaXMgZ2V0 cyBiYWNrcG9ydGVkIHRvIG9sZGVyIGtlcm5lbHMuLi4KClRoYW5rcywKCiAgICAgICAgIE0uCi0t IApKYXp6IGlzIG5vdCBkZWFkLiBJdCBqdXN0IHNtZWxscyBmdW5ueS4uLgoKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWls aW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0 cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=