From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniele Ceraolo Spurio Subject: Re: [PATCH v3] drm/i915: check that rpm ref is held when accessing ringbuf in stolen mem Date: Thu, 28 Jan 2016 10:55:16 +0000 Message-ID: <56A9F394.7030205@intel.com> References: <1453909429-11024-1-git-send-email-daniele.ceraolospurio@intel.com> <20160127163916.GF23290@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTP id 4DA3E6E82C for ; Thu, 28 Jan 2016 02:55:19 -0800 (PST) In-Reply-To: <20160127163916.GF23290@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org CgpPbiAyNy8wMS8xNiAxNjozOSwgVmlsbGUgU3lyasOkbMOkIHdyb3RlOgo+IE9uIFdlZCwgSmFu IDI3LCAyMDE2IGF0IDAzOjQzOjQ5UE0gKzAwMDAsZGFuaWVsZS5jZXJhb2xvc3B1cmlvQGludGVs LmNvbSAgd3JvdGU6Cj4+IEZyb206IERhbmllbGUgQ2VyYW9sbyBTcHVyaW88ZGFuaWVsZS5jZXJh b2xvc3B1cmlvQGludGVsLmNvbT4KPj4KPj4gV2hpbGUgcnVubmluZyBzb21lIHRlc3RzIG9uIHRo ZSBzY2hlZHVsZXIgcGF0Y2hlcyB3aXRoIHJwbSBlbmFibGVkIEkKPj4gY2FtZSBhY3Jvc3MgYSBj b3JydXB0aW9uIGluIHRoZSByaW5nYnVmZmVyLCB3aGljaCB3YXMgcm9vdC1jYXVzZWQgdG8KPj4g dGhlIEdQVSBiZWluZyBzdXNwZW5kZWQgd2hpbGUgY29tbWFuZHMgd2VyZSBiZWluZyBlbWl0dGVk IHRvIHRoZQo+PiByaW5nYnVmZmVyLiBUaGUgYWNjZXNzIHRvIG1lbW9yeSB3YXMgZmFpbGluZyBi ZWNhdXNlIHRoZSBHUFUgbmVlZHMgdG8KPj4gYmUgYXdha2Ugd2hlbiBhY2Nlc3Npbmcgc3RvbGVu IG1lbW9yeSAod2hlcmUgbXkgcmluZ2J1ZmZlciB3YXMgbG9jYXRlZCkuCj4+IFNpbmNlIHdlIGhh dmUgdGhpcyBjb25zdHJhaW50IGl0IGxvb2tzIGxpa2UgYSBzZW5zaWJsZSBpZGVhIHRvIGNoZWNr Cj4+IHRoYXQgd2UgaG9sZCBhIHJlZmNvdW50IHdoZW4gd2UgYWNjZXNzIHRoZSBydW5nYnVmZmVy Lgo+Pgo+PiB2MjogbW92ZSB0aGUgY2hlY2sgZnJvbSByaW5nX2JlZ2luIHRvIHJpbmdidWZmZXIg aW9tYXAgdGltZSAoQ2hyaXMpCj4+IHYzOiB1cGRhdGUgY29tbWVudCAoQ2hyaXMpCj4+Cj4+IENj OiBKb2huIEhhcnJpc29uPEpvaG4uQy5IYXJyaXNvbkBJbnRlbC5jb20+Cj4+IENjOiBDaHJpcyBX aWxzb248Y2hyaXNAY2hyaXMtd2lsc29uLmNvLnVrPgo+PiBTaWduZWQtb2ZmLWJ5OiBEYW5pZWxl IENlcmFvbG8gU3B1cmlvPGRhbmllbGUuY2VyYW9sb3NwdXJpb0BpbnRlbC5jb20+Cj4+IC0tLQo+ PiAgIGRyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3JpbmdidWZmZXIuYyB8IDMgKysrCj4+ICAg MSBmaWxlIGNoYW5nZWQsIDMgaW5zZXJ0aW9ucygrKQo+Pgo+PiBkaWZmIC0tZ2l0IGEvZHJpdmVy cy9ncHUvZHJtL2k5MTUvaW50ZWxfcmluZ2J1ZmZlci5jIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUv aW50ZWxfcmluZ2J1ZmZlci5jCj4+IGluZGV4IDZmNWI1MTEuLjEzMzMyMWEgMTAwNjQ0Cj4+IC0t LSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3JpbmdidWZmZXIuYwo+PiArKysgYi9kcml2 ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9yaW5nYnVmZmVyLmMKPj4gQEAgLTIxMTksNiArMjExOSw5 IEBAIGludCBpbnRlbF9waW5fYW5kX21hcF9yaW5nYnVmZmVyX29iaihzdHJ1Y3QgZHJtX2Rldmlj ZSAqZGV2LAo+PiAgIAkJCXJldHVybiByZXQ7Cj4+ICAgCQl9Cj4+ICAgCj4+ICsJCS8qIEFjY2Vz cyB0aHJvdWdoIHRoZSBHVFQgcmVxdWlyZXMgdGhlIGRldmljZSB0byBiZSBhd2FrZS4gKi8KPj4g KwkJYXNzZXJ0X3JwbV93YWtlbG9ja19oZWxkKGRldl9wcml2KTsKPj4gKwo+IEhtbS4gVGhpcyBm dW5jdGlvbiBkb2Vzbid0IGFjdHVhbGx5IGFjY2VzIHRoZSByaW5nIGJ1ZmZlciwgc28gaXQncyBh IGJpdAo+IG9kZCB0byBzZWUgdGhpcyBoZXJlLgoKSSBoYWQgaXQgaW5yaW5nX2JlZ2luIGluaXRp YWxseSwgYnV0IENocmlzIHN1Z2dlc3RlZCBtb3ZpbmcgaXQgaGVyZSAKYmVjYXVzZSB3ZSBwaW4g dGhlIHJpbmdidWZmZXIgYmVmb3JlIGFjY2Vzc2luZyBpdC4gRG8geW91IGhhdmUgYSAKZGlmZmVy ZW50IHBsYWNlIGluIG1pbmQgZm9yIHdoZXJlIHRoaXMgc2hvdWxkIGJlIGFkZGVkIG9yIHdvdWxk IHlvdSBiZSAKaGFwcHkgd2l0aCBhIHNpbXBsZSBjb21tZW50IHVwZGF0ZT8KClRoYW5rcywKRGFu aWVsZQoKPj4gICAJCXJpbmdidWYtPnZpcnR1YWxfc3RhcnQgPSBpb3JlbWFwX3djKGRldl9wcml2 LT5ndHQubWFwcGFibGVfYmFzZSArCj4+ICAgCQkJCQkJICAgIGk5MTVfZ2VtX29ial9nZ3R0X29m ZnNldChvYmopLCByaW5nYnVmLT5zaXplKTsKPj4gICAJCWlmIChyaW5nYnVmLT52aXJ0dWFsX3N0 YXJ0ID09IE5VTEwpIHsKPj4gLS0gCj4+IDEuOS4xCj4+Cj4+IF9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fCj4+IEludGVsLWdmeCBtYWlsaW5nIGxpc3QKPj4g SW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwo+PiBodHRwOi8vbGlzdHMuZnJlZWRlc2t0 b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4CgpfX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdm eEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cDovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWls bWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=