From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Kuoppala Subject: Re: [PATCH 2/2] drm/i915: Avoid unguarded reads from the request pointer Date: Mon, 06 Feb 2017 17:04:01 +0200 Message-ID: <87r33bs6n2.fsf@gaia.fi.intel.com> References: <20170206132559.6137-1-chris@chris-wilson.co.uk> <20170206132559.6137-2-chris@chris-wilson.co.uk> <87zihzs9pg.fsf@gaia.fi.intel.com> <20170206141609.GM12434@nuc-i3427.alporthouse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id E929E6E436 for ; Mon, 6 Feb 2017 15:05:44 +0000 (UTC) In-Reply-To: <20170206141609.GM12434@nuc-i3427.alporthouse.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org Q2hyaXMgV2lsc29uIDxjaHJpc0BjaHJpcy13aWxzb24uY28udWs+IHdyaXRlczoKCj4gT24gTW9u LCBGZWIgMDYsIDIwMTcgYXQgMDM6NTc6NDdQTSArMDIwMCwgTWlrYSBLdW9wcGFsYSB3cm90ZToK Pj4gQ2hyaXMgV2lsc29uIDxjaHJpc0BjaHJpcy13aWxzb24uY28udWs+IHdyaXRlczoKPj4gCj4+ ID4gSW4gY29tbWl0IDg2YWE3ZTc2MGE2NyAoImRybS9pOTE1OiBBc3NlcnQgdGhhdCB0aGUgY29u dGV4dC1zd2l0Y2gKPj4gPiBjb21wbGV0aW9uIG1hdGNoZXMgb3VyIGNvbnRleHQiKSBJIGFkZGVk IGEgcmVhZCB0byB0aGUgaXJxIHRhc2tsZXQKPj4gPiBoYW5kbGVyIHRoYXQgY29tcGFyZWQgdGhl IG9uLWNoaXAgc3RhdHVzIHdpdGggdGhhdCBvZiBvdXIgc3cgdHJhY2tpbmcsCj4+ID4gdXNpbmcg YW4gdW5ndWFyZGVkIHJlYWQgb2YgdGhlIHJlcXVlc3QgcG9pbnRlciB0byBnZXQgdGhlIGNvbnRl eHQgYW5kCj4+ID4gYmV5b25kLiBXaGlsc3Qgd2UgaG9sZCBhIHJlZmVyZW5jZSB0byB0aGUgcmVx dWVzdCwgd2UgZG8gbm90IGhvbGQKPj4gPiBhbnl0aGluZyBvbiB0aGUgY29udGV4dCBhbmQgaWYg d2UgYXJlIHVubHVja3kgaXQgbWF5IGJlIHJlYXBlZCBmcm9tIGEKPj4gPiBzZWNvbmQgdGhyZWFk IHJldGlyaW5nIHRoZSByZXF1ZXN0IChzaW5jZSBpdCBtYXkgcmV0aXJlIHRoZSByZXF1ZXN0IGFz Cj4+ID4gc29vbiBhcyB0aGUgYnJlYWRjcnVtYiBpcyBjb21wbGV0ZSwgZXZlbiBiZWZvcmUgd2Ug ZmluaXNoIHByb2Nlc3NpbmcgdGhlCj4+ID4gY29udGV4dCBzd2l0Y2gpIGFzIHdlIHRyeSB0byBy ZWFkIGZyb20gdGhlIGNvbnRleHQgcG9pbnRlci4KPj4gPgo+PiAKPj4gUGxlYXNlIGFkZCB3YXJu aW5nIG9mIHRoZSBwb3NzaWJpbGl0eSBvZiBjb250ZXh0IHZhbmlzaGluZyBiZW5lYXRoCj4+IG91 ciBmZWV0LiBQZXJoYXBzIGEgZ29vZCBzcG90IGlzIHdoZW4gd2Ugc3RvcmUgYSBidWcgb24gdmFy aWFibGUKPj4gY29udGV4dF9pZC4KPgo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vaTkx NS9pbnRlbF9scmMuYyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2xyYy5jCj4gaW5kZXgg YzZjNTA1MGM3OWMwLi45MzdlMmFmMmRhNjQgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUvZHJt L2k5MTUvaW50ZWxfbHJjLmMKPiArKysgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9scmMu Ywo+IEBAIC01NjQsNiArNTY0LDIyIEBAIHN0YXRpYyB2b2lkIGludGVsX2xyY19pcnFfaGFuZGxl cih1bnNpZ25lZCBsb25nIGRhdGEpCj4gICAgICAgICAgICAgICAgICAgICAgICAgdW5zaWduZWQg aW50IGlkeCA9ICsraGVhZCAlIEdFTjhfQ1NCX0VOVFJJRVM7Cj4gICAgICAgICAgICAgICAgICAg ICAgICAgdW5zaWduZWQgaW50IHN0YXR1cyA9IHJlYWRsKGJ1ZiArIDIgKiBpZHgpOwo+ICAKPiAr ICAgICAgICAgICAgICAgICAgICAgICAvKiBXZSBhcmUgZmx5aW5nIG5lYXIgZHJhZ29ucyBhZ2Fp bi4KPiArICAgICAgICAgICAgICAgICAgICAgICAgKgo+ICsgICAgICAgICAgICAgICAgICAgICAg ICAqIFdlIGhvbGQgYSByZWZlcmVuY2UgdG8gdGhlIHJlcXVlc3QgaW4gZXhlY2xpc3RfcG9ydFtd Cj4gKyAgICAgICAgICAgICAgICAgICAgICAgICogYnV0IG5vIG1vcmUgdGhhbiB0aGF0LiBXZSBh cmUgb3BlcmF0aW5nIGluIHNvZnRpcnEKPiArICAgICAgICAgICAgICAgICAgICAgICAgKiBjb250 ZXh0IGFuZCBzbyBjYW5ub3QgaG9sZCBhbnkgbXV0ZXggb3Igc2xlZXAuIFRoYXQKPiArICAgICAg ICAgICAgICAgICAgICAgICAgKiBwcmV2ZW50cyB1cyBzdG9wcGluZyB0aGUgcmVxdWVzdHMgd2Ug YXJlIHByb2Nlc3NpbmcKPiArICAgICAgICAgICAgICAgICAgICAgICAgKiBpbiBwb3J0W10gZnJv bSBiZWluZyByZXRpcmVkIHNpbXVsdGFuZW91c2x5ICh0aGUKPiArICAgICAgICAgICAgICAgICAg ICAgICAgKiBicmVhZGNydW1iIHdpbGwgYmUgY29tcGxldGUgYmVmb3JlIHdlIHNlZSB0aGUKPiAr ICAgICAgICAgICAgICAgICAgICAgICAgKiBjb250ZXh0LXN3aXRjaCkuIEFzIHdlIG9ubHkgaG9s ZCB0aGUgcmVmZXJlbmNlIHRvCj4gKyAgICAgICAgICAgICAgICAgICAgICAgICogcmVxdWVzdCwg YW55IHBvaW50ZXIgY2hhc2luZyB1bmRlcm5lYXRoIHRoZSByZXF1ZXN0Cj4gKyAgICAgICAgICAg ICAgICAgICAgICAgICogaXMgc3ViamVjdCB0byBhIHBvdGVudGlhbCB1c2UtYWZ0ZXItZnJlZS4g VGh1cyB3ZQo+ICsgICAgICAgICAgICAgICAgICAgICAgICAqIHN0b3JlIGFsbCBvZiB0aGUgYm9v a2tlZXBpbmcgd2l0aGluIHBvcnRbXSwgaWYKPiArICAgICAgICAgICAgICAgICAgICAgICAgKiBy ZXF1aXJlZCwgYW5kIGF2b2lkIHVzaW5nIHJlcXVlc3QgaXRzZWxmLiBUaGUKPiArICAgICAgICAg ICAgICAgICAgICAgICAgKiBzYW1lIGFwcGxpZXMgdG8gdGhlIGF0b21pYyBzdGF0dXMgbm90aWZp ZXIuCj4gKyAgICAgICAgICAgICAgICAgICAgICAgICovCj4gKwoKQWdyZWVkIHRoYXQgaXQgaXMg YmV0dGVyIGluIHRoaXMgc3BvdCBhbmQgdGhhdCBhbnkgcG9pbnRlciBjaGFzaW5nCndpbGwgbGVh ZCB0byB0cm91YmxlLgoKLU1pa2EKCj4gICAgICAgICAgICAgICAgICAgICAgICAgaWYgKCEoc3Rh dHVzICYgR0VOOF9DVFhfU1RBVFVTX0NPTVBMRVRFRF9NQVNLKSkKPiAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgIGNvbnRpbnVlOwo+Cj4gLS0gCj4gQ2hyaXMgV2lsc29uLCBJbnRlbCBP cGVuIFNvdXJjZSBUZWNobm9sb2d5IENlbnRyZQpfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0 cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9s aXN0aW5mby9pbnRlbC1nZngK