From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tvrtko Ursulin Subject: Re: [PATCH] drm/i915: Avoid divbyzero in modesetting Date: Mon, 22 Feb 2016 14:27:44 +0000 Message-ID: <56CB1AE0.4090204@linux.intel.com> References: <1456141948-7172-1-git-send-email-tvrtko.ursulin@linux.intel.com> <56CB08A0.30406@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 5381F6E1FE for ; Mon, 22 Feb 2016 14:27:47 +0000 (UTC) In-Reply-To: <56CB08A0.30406@linux.intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Maarten Lankhorst , Intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org Ck9uIDIyLzAyLzE2IDEzOjA5LCBNYWFydGVuIExhbmtob3JzdCB3cm90ZToKPiBIZXksCj4gCj4g T3AgMjItMDItMTYgb20gMTI6NTIgc2NocmVlZiBUdnJ0a28gVXJzdWxpbjoKPj4gRnJvbTogVHZy dGtvIFVyc3VsaW4gPHR2cnRrby51cnN1bGluQGludGVsLmNvbT4KPj4KPj4gTm90IHN1cmUgaWYg aW50ZWxfd21fY29uZmlnLT5udW1fcGlwZXNfYWN0aXZlIGlzIHN1cHBvc2VkIHRvCj4+IGV2ZXIg YmUgemVybyB3aGVuIGludGVsX3VwZGF0ZV93YXRlcm1hcmtzIGdldHMgY2FsbGVkLiBCdXQKPj4g c2luY2UgaXQgY2FuIGJlIHRyaWdnZXJlZCBpbiBlYXJseSBwbGF0Zm9ybSBicmluZ3VwIHBlcmhh cHMKPj4gd2Ugd2FudCB0byBndWFyZCBhZ2FpbnN0IGl0IHJhdGhlciB0aGFuIGRpdmlkZSBieSB6 ZXJvLgo+Pgo+PiBTaWduZWQtb2ZmLWJ5OiBUdnJ0a28gVXJzdWxpbiA8dHZydGtvLnVyc3VsaW5A aW50ZWwuY29tPgo+PiBDYzogTWF0dCBSb3BlciA8bWF0dGhldy5kLnJvcGVyQGludGVsLmNvbT4K Pj4gQ2M6IFZpbGxlIFN5cmrDpGzDpCA8dmlsbGUuc3lyamFsYUBsaW51eC5pbnRlbC5jb20+Cj4+ IENjOiBEYW5pZWwgVmV0dGVyIDxkYW5pZWxAZmZ3bGwuY2g+Cj4+IENjOiBNYWFydGVuIExhbmto b3JzdCA8bWFhcnRlbi5sYW5raG9yc3RAbGludXguaW50ZWwuY29tPgo+PiAtLS0KPj4gICBkcml2 ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9wbS5jIHwgOSArKysrKysrLS0KPj4gICAxIGZpbGUgY2hh bmdlZCwgNyBpbnNlcnRpb25zKCspLCAyIGRlbGV0aW9ucygtKQo+Pgo+PiBkaWZmIC0tZ2l0IGEv ZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfcG0uYyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2lu dGVsX3BtLmMKPj4gaW5kZXggZmViNTc1OTg3MjdhLi4yYjc5OTg4ODk2MTcgMTAwNjQ0Cj4+IC0t LSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3BtLmMKPj4gKysrIGIvZHJpdmVycy9ncHUv ZHJtL2k5MTUvaW50ZWxfcG0uYwo+PiBAQCAtMjgzMSw4ICsyODMxLDEzIEBAIHNrbF9kZGJfZ2V0 X3BpcGVfYWxsb2NhdGlvbl9saW1pdHMoc3RydWN0IGRybV9kZXZpY2UgKmRldiwKPj4gICAJCW50 aF9hY3RpdmVfcGlwZSsrOwo+PiAgIAl9Cj4+ICAgCj4+IC0JcGlwZV9zaXplID0gZGRiX3NpemUg LyBjb25maWctPm51bV9waXBlc19hY3RpdmU7Cj4+IC0JYWxsb2MtPnN0YXJ0ID0gbnRoX2FjdGl2 ZV9waXBlICogZGRiX3NpemUgLyBjb25maWctPm51bV9waXBlc19hY3RpdmU7Cj4+ICsJaWYgKFdB Uk5fT04oIWNvbmZpZy0+bnVtX3BpcGVzX2FjdGl2ZSkpIHsKPj4gKwkJcGlwZV9zaXplID0gMDsK Pj4gKwkJYWxsb2MtPnN0YXJ0ID0gMDsKPj4gKwl9IGVsc2Ugewo+PiArCQlwaXBlX3NpemUgPSBk ZGJfc2l6ZSAvIGNvbmZpZy0+bnVtX3BpcGVzX2FjdGl2ZTsKPj4gKwkJYWxsb2MtPnN0YXJ0ID0g bnRoX2FjdGl2ZV9waXBlICogZGRiX3NpemUgLyBjb25maWctPm51bV9waXBlc19hY3RpdmU7Cj4+ ICsJfQo+PiAgIAlhbGxvYy0+ZW5kID0gYWxsb2MtPnN0YXJ0ICsgcGlwZV9zaXplOwo+PiAgIH0K Pj4gICAKPiBIb3cgY2FuIHRoaXMgaGFwcGVuPyBJdCBzZWVtcyBpbiB0aGF0IGNhc2UgY3N0YXRl LT5iYXNlLmFjdGl2ZSB3b3VsZCBiZSBmYWxzZSBmb3IgdGhlIGN1cnJlbnQgcGlwZSwKPiBhbmQg dGhlIGNvZGUgc2hvdWxkIGJhaWwgZWFybHkgYWxyZWFkeS4uCgpEb24ndCBrbm93LCBidXQgZG9l cyBpdCBoYXJtIHRvIGd1YXJkIGFnYWluc3QgaXQ/IEhlbHBzIGVhcmx5CnBsYXRmb3JtIGJyaW5n dXAgYSBiaXQuCgogW2RybTppbnRlbF9tb2Rlc2V0X3JlYWRvdXRfaHdfc3RhdGVdIFtDUlRDOjIx XSBodyBzdGF0ZSByZWFkb3V0OiBlbmFibGVkCiBbZHJtOmludGVsX21vZGVzZXRfcmVhZG91dF9o d19zdGF0ZV0gW0NSVEM6MjZdIGh3IHN0YXRlIHJlYWRvdXQ6IGRpc2FibGVkCiBbZHJtOmludGVs X21vZGVzZXRfcmVhZG91dF9od19zdGF0ZV0gW0NSVEM6MzFdIGh3IHN0YXRlIHJlYWRvdXQ6IGRp c2FibGVkCiBbZHJtOmludGVsX21vZGVzZXRfcmVhZG91dF9od19zdGF0ZV0gUE9SVCBQTEwgQSBo dyBzdGF0ZSByZWFkb3V0OiBjcnRjX21hc2sgMHgwMDAwMDAwMSwgb24gMAogW2RybTppbnRlbF9t b2Rlc2V0X3JlYWRvdXRfaHdfc3RhdGVdIFBPUlQgUExMIEIgaHcgc3RhdGUgcmVhZG91dDogY3J0 Y19tYXNrIDB4MDAwMDAwMDAsIG9uIDAKIFtkcm06aW50ZWxfbW9kZXNldF9yZWFkb3V0X2h3X3N0 YXRlXSBQT1JUIFBMTCBDIGh3IHN0YXRlIHJlYWRvdXQ6IGNydGNfbWFzayAweDAwMDAwMDAwLCBv biAwCiBbZHJtOmludGVsX21vZGVzZXRfcmVhZG91dF9od19zdGF0ZV0gW0VOQ09ERVI6MzM6VE1E Uy0zM10gaHcgc3RhdGUgcmVhZG91dDogZGlzYWJsZWQsIHBpcGUgQQogW2RybTppbnRlbF9tb2Rl c2V0X3JlYWRvdXRfaHdfc3RhdGVdIFtFTkNPREVSOjM1OkRQIE1TVC0zNV0gaHcgc3RhdGUgcmVh ZG91dDogZGlzYWJsZWQsIHBpcGUgQQogW2RybTppbnRlbF9tb2Rlc2V0X3JlYWRvdXRfaHdfc3Rh dGVdIFtFTkNPREVSOjM2OkRQIE1TVC0zNl0gaHcgc3RhdGUgcmVhZG91dDogZGlzYWJsZWQsIHBp cGUgQgogW2RybTppbnRlbF9tb2Rlc2V0X3JlYWRvdXRfaHdfc3RhdGVdIFtFTkNPREVSOjM3OkRQ IE1TVC0zN10gaHcgc3RhdGUgcmVhZG91dDogZGlzYWJsZWQsIHBpcGUgQwogW2RybTppbnRlbF9t b2Rlc2V0X3JlYWRvdXRfaHdfc3RhdGVdIFtFTkNPREVSOjQyOlRNRFMtNDJdIGh3IHN0YXRlIHJl YWRvdXQ6IGRpc2FibGVkLCBwaXBlIEEKIFtkcm06aW50ZWxfbW9kZXNldF9yZWFkb3V0X2h3X3N0 YXRlXSBbRU5DT0RFUjo0NDpEUCBNU1QtNDRdIGh3IHN0YXRlIHJlYWRvdXQ6IGRpc2FibGVkLCBw aXBlIEEKIFtkcm06aW50ZWxfbW9kZXNldF9yZWFkb3V0X2h3X3N0YXRlXSBbRU5DT0RFUjo0NTpE UCBNU1QtNDVdIGh3IHN0YXRlIHJlYWRvdXQ6IGRpc2FibGVkLCBwaXBlIEIKIFtkcm06aW50ZWxf bW9kZXNldF9yZWFkb3V0X2h3X3N0YXRlXSBbRU5DT0RFUjo0NjpEUCBNU1QtNDZdIGh3IHN0YXRl IHJlYWRvdXQ6IGRpc2FibGVkLCBwaXBlIEMKIFtkcm06aW50ZWxfbW9kZXNldF9yZWFkb3V0X2h3 X3N0YXRlXSBbQ09OTkVDVE9SOjM0OkRQLTFdIGh3IHN0YXRlIHJlYWRvdXQ6IGRpc2FibGVkCiBb ZHJtOmludGVsX21vZGVzZXRfcmVhZG91dF9od19zdGF0ZV0gW0NPTk5FQ1RPUjo0MDpIRE1JLUEt MV0gaHcgc3RhdGUgcmVhZG91dDogZGlzYWJsZWQKIFtkcm06aW50ZWxfbW9kZXNldF9yZWFkb3V0 X2h3X3N0YXRlXSBbQ09OTkVDVE9SOjQzOkRQLTJdIGh3IHN0YXRlIHJlYWRvdXQ6IGRpc2FibGVk CiBbZHJtOmludGVsX21vZGVzZXRfcmVhZG91dF9od19zdGF0ZV0gW0NPTk5FQ1RPUjo0NzpIRE1J LUEtMl0gaHcgc3RhdGUgcmVhZG91dDogZGlzYWJsZWQKIFtkcm06ZHJtX2NhbGNfdGltZXN0YW1w aW5nX2NvbnN0YW50cyBbZHJtXV0gKkVSUk9SKiBjcnRjIDIxOiBDYW4ndCBjYWxjdWxhdGUgY29u c3RhbnRzLCBkb3RjbG9jayA9IDAhCiBbZHJtOmk5MTVfZ2V0X3ZibGFua190aW1lc3RhbXBdIGNy dGMgMCBpcyBkaXNhYmxlZAogW2RybTppOTE1X2dldF92YmxhbmtfdGltZXN0YW1wXSBjcnRjIDAg aXMgZGlzYWJsZWQKIFtkcm06aTkxNV9nZXRfdmJsYW5rX3RpbWVzdGFtcF0gY3J0YyAwIGlzIGRp c2FibGVkCiBbZHJtOmk5MTVfZ2V0X3ZibGFua190aW1lc3RhbXBdIGNydGMgMCBpcyBkaXNhYmxl ZAogW2RybTppOTE1X2dldF92YmxhbmtfdGltZXN0YW1wXSBjcnRjIDAgaXMgZGlzYWJsZWQKIFtk cm06aTkxNV9nZXRfdmJsYW5rX3RpbWVzdGFtcF0gY3J0YyAwIGlzIGRpc2FibGVkCiBbZHJtOmlu dGVsX2Rpc2FibGVfcGlwZV0gZGlzYWJsaW5nIHBpcGUgQQoKLi4uCgpbICAgMTAuMDYyODgxXSAg WzxmZmZmZmZmZmEwMTZhZGQyPl0gc2tsX3VwZGF0ZV9waXBlX3dtKzB4MTAyLzB4OGMwIFtpOTE1 XQpbICAgMTAuMDYyOTQyXSAgWzxmZmZmZmZmZmEwMTZiOTZmPl0gc2tsX3VwZGF0ZV93bSsweGZm LzB4NWYwIFtpOTE1XQpbICAgMTAuMDYzMDI3XSAgWzxmZmZmZmZmZmEwMTZjZTZlPl0gaW50ZWxf dXBkYXRlX3dhdGVybWFya3MrMHgxZS8weDMwIFtpOTE1XQpbICAgMTAuMDYzMDg3XSAgWzxmZmZm ZmZmZmEwMWQzZWUyPl0gaW50ZWxfY3J0Y19kaXNhYmxlX25vYXRvbWljKzB4ZDIvMHgxNTAgW2k5 MTVdClsgICAxMC4wNjMxNDhdICBbPGZmZmZmZmZmYTAxZGQzZDI+XSBpbnRlbF9tb2Rlc2V0X3Nl dHVwX2h3X3N0YXRlKzB4ZGQyLzB4ZGUwIFtpOTE1XQpbICAgMTAuMDYzMTgxXSAgWzxmZmZmZmZm ZmEwMWRmZDgzPl0gaW50ZWxfbW9kZXNldF9pbml0KzB4MTVhMy8weDE5NTAgW2k5MTVdClsgICAx MC4wNjMxODFdICBbPGZmZmZmZmZmYTAyMTYwYjY+XSBpOTE1X2RyaXZlcl9sb2FkKzB4MTNjNi8w eDE3MjAgW2k5MTVdCgpSZWdhcmRzLAoKVHZydGtvCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwtZ2Z4QGxp c3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2ludGVsLWdmeAo=