From mboxrd@z Thu Jan 1 00:00:00 1970 From: jeff.mcgee@intel.com Subject: [RFC 2/8] drm/i915: Skip CSB processing on invalid CSB tail Date: Fri, 16 Mar 2018 11:30:59 -0700 Message-ID: <20180316183105.16027-3-jeff.mcgee@intel.com> References: <20180316183105.16027-1-jeff.mcgee@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id 017976E04A for ; Fri, 16 Mar 2018 18:45:40 +0000 (UTC) In-Reply-To: <20180316183105.16027-1-jeff.mcgee@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: intel-gfx@lists.freedesktop.org Cc: ben@bwidawsk.net, kalyan.kondapally@intel.com List-Id: intel-gfx@lists.freedesktop.org RnJvbTogSmVmZiBNY0dlZSA8amVmZi5tY2dlZUBpbnRlbC5jb20+CgpFbmdpbmUgcmVzZXQgaXMg ZmFzdC4gQSBjb250ZXh0IHN3aXRjaCBpbnRlcnJ1cHQgbWF5IGJlIGdlbmVyYXRlZCBqdXN0CnBy aW9yIHRvIHRoZSByZXNldCBzdWNoIHRoYXQgdGhlIHRvcCBoYWxmIGhhbmRsZXIgaXMgcmFjaW5n IHdpdGggcmVzZXQKcG9zdC1wcm9jZXNzaW5nLiBUaGUgaGFuZGxlciBtYXkgc2V0IHRoZSBpcnFf cG9zdGVkIGJpdCBhZ2FpbiBhZnRlcgp0aGUgcmVzZXQgY29kZSBoYXMgY2xlYXJlZCBpdCB0byBz dGFydCBmcmVzaC4gVGhlbiB0aGUgcmUtZW5hYmxlZAp0YXNrbGV0IHdpbGwgcmVhZCB0aGUgQ1NC IGhlYWQgYW5kIHRhaWwgZnJvbSBNTUlPLCB3aGljaCB3aWxsIGJlIGF0CnRoZSBoYXJkd2FyZSBy ZXNldCB2YWx1ZXMgb2YgMCBhbmQgNyByZXNwZWN0aXZlbHksIGdpdmVuIHRoYXQgbm8KYWN0dWFs IENTQiBldmVudCBoYXMgb2NjdXJyZWQgc2luY2UgdGhlIHJlc2V0LiBNYXloZW0gdGhlbiBlbnN1 ZXMgYXMKdGhlIHRhc2tsZXQgc3RhcnRzIHByb2Nlc3NpbmcgaW52YWxpZCBDU0IgZW50cmllcy4K CldlIGNhbiBoYW5kbGUgdGhpcyBjb3JuZXIgY2FzZSB3aXRob3V0IGFkZGluZyBhbnkgbmV3IHN5 bmNocm9uaXphdGlvbgpiZXR3ZWVuIHRoZSBpcnEgdG9wIGhhbGYgYW5kIHRoZSByZXNldCB3b3Jr IGl0ZW0uIFRoZSB0YXNrbGV0IGNhbgpqdXN0IHNraXAgQ1NCIHByb2Nlc3NpbmcgaWYgdGhlIHRh aWwgaXMgbm90IHNhbmUuCgpUaGlzIHBhdGNoIGlzIHJlcXVpcmVkIHRvIHN1cHBvcnQgdGhlIGZv cmNlIHByZWVtcHRpb24gZmVhdHVyZS4KClRlc3Q6IFJ1biBJR1QgZ2VtX2V4ZWNfZnByZWVtcHQg cmVwZWF0ZWRseS4KQ2hhbmdlLUlkOiBJYzdlYjAwNjAwNDgwYmQ2MjMzMWMzOTdkZDkyYjc0N2Q5 NDYyNDFlNApTaWduZWQtb2ZmLWJ5OiBKZWZmIE1jR2VlIDxqZWZmLm1jZ2VlQGludGVsLmNvbT4K LS0tCiBkcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9scmMuYyB8IDkgKysrKysrKysrCiAxIGZp bGUgY2hhbmdlZCwgOSBpbnNlcnRpb25zKCspCgpkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJt L2k5MTUvaW50ZWxfbHJjLmMgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9scmMuYwppbmRl eCA3ZDkzZmNkNTZkMzQuLjVmNjNkMWQ2YTJkNiAxMDA2NDQKLS0tIGEvZHJpdmVycy9ncHUvZHJt L2k5MTUvaW50ZWxfbHJjLmMKKysrIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfbHJjLmMK QEAgLTg1MSw2ICs4NTEsMTQgQEAgc3RhdGljIHZvaWQgaW50ZWxfbHJjX2lycV9oYW5kbGVyKHVu c2lnbmVkIGxvbmcgZGF0YSkKIAkJCWhlYWQgPSByZWFkbChkZXZfcHJpdi0+cmVncyArIGk5MTVf bW1pb19yZWdfb2Zmc2V0KFJJTkdfQ09OVEVYVF9TVEFUVVNfUFRSKGVuZ2luZSkpKTsKIAkJCXRh aWwgPSBHRU44X0NTQl9XUklURV9QVFIoaGVhZCk7CiAJCQloZWFkID0gR0VOOF9DU0JfUkVBRF9Q VFIoaGVhZCk7CisKKwkJCS8qIFRoZSBNTUlPIHJlYWQgQ1NCIHRhaWwgbWF5IGJlIGF0IHRoZSBy ZXNldCB2YWx1ZSBvZgorCQkJICogMHg3IGlmIHRoZXJlIGhhc24ndCBiZWVuIGEgdmFsaWQgQ1NC IGV2ZW50IHNpbmNlCisJCQkgKiB0aGUgZW5naW5lIHJlc2V0LiBTa2lwIG9uIHRvIGRlcXVldWUg aWYgc28uCisJCQkgKi8KKwkJCWlmICh0YWlsID49IEdFTjhfQ1NCX0VOVFJJRVMpCisJCQkJYnJl YWs7CisKIAkJCWV4ZWNsaXN0cy0+Y3NiX2hlYWQgPSBoZWFkOwogCQl9IGVsc2UgewogCQkJY29u c3QgaW50IHdyaXRlX2lkeCA9CkBAIC04NTksNiArODY3LDcgQEAgc3RhdGljIHZvaWQgaW50ZWxf bHJjX2lycV9oYW5kbGVyKHVuc2lnbmVkIGxvbmcgZGF0YSkKIAogCQkJaGVhZCA9IGV4ZWNsaXN0 cy0+Y3NiX2hlYWQ7CiAJCQl0YWlsID0gUkVBRF9PTkNFKGJ1Zlt3cml0ZV9pZHhdKTsKKwkJCUdF TV9CVUdfT04odGFpbCA+PSBHRU44X0NTQl9FTlRSSUVTKTsKIAkJfQogCiAJCXdoaWxlIChoZWFk ICE9IHRhaWwpIHsKLS0gCjIuMTYuMgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJl ZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGlu Zm8vaW50ZWwtZ2Z4Cg==