From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Kuoppala Subject: [PATCH 4/4] drm/i915: Detect small loops in hangcheck Date: Mon, 30 Nov 2015 18:53:09 +0200 Message-ID: <1448902389-12477-4-git-send-email-mika.kuoppala@intel.com> References: <1448902389-12477-1-git-send-email-mika.kuoppala@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTP id 61CFF6E60C for ; Mon, 30 Nov 2015 08:53:45 -0800 (PST) In-Reply-To: <1448902389-12477-1-git-send-email-mika.kuoppala@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: miku@iki.fi List-Id: intel-gfx@lists.freedesktop.org SWYgdGhlcmUgaXMgdmVyeSBzbWFsbCBsb29wIGluIGJhdGNoLCB0aGUgY2hhbmNlcyBhcmUgcXVp dGUgaGlnaAp0aGF0IHdlIHNhbXBsZSB0aGUgc2FtZSBoZWFkIHZhbHVlIHR3aWNlIGluIGEgcm93 IGxlYWRpbmcgdGhlCmhhbmdjaGVjayBzY29yZSB0byBiZSBpbmNyZW1lbnRlZCB3aXRoIGh1bmcg ZW5naW5lIHN0YXR1cywgaW5zdGVhZCBvZgphY3RpdmUgbG9vcCB3aGljaCB3b3VsZCBoYXZlIGJl ZW4gbW9yZSBjb3JyZWN0LgoKVHJ5IHRvIHJlc2FtcGxlIHRoZSBhY3R1YWwgaGVhZCBmZXcgdGlt ZXMgdG8gZGV0ZWN0IHNtYWxsIGxvb3BzCmluc3RlYWQgb2YganVtcGluZyBpbnRvIGNvbmNsdXNp b25zLgoKQ2M6IENocmlzIFdpbHNvbiA8Y2hyaXNAY2hyaXMtd2lsc29uLmNvLnVrPgpTaWduZWQt b2ZmLWJ5OiBNaWthIEt1b3BwYWxhIDxtaWthLmt1b3BwYWxhQGludGVsLmNvbT4KLS0tCiBkcml2 ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2lycS5jIHwgMzIgKysrKysrKysrKysrKysrKysrKysrKysr KysrLS0tLS0KIDEgZmlsZSBjaGFuZ2VkLCAyNyBpbnNlcnRpb25zKCspLCA1IGRlbGV0aW9ucygt KQoKZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfaXJxLmMgYi9kcml2ZXJz L2dwdS9kcm0vaTkxNS9pOTE1X2lycS5jCmluZGV4IGMxZDE0MDAuLjdjMTE2OGIgMTAwNjQ0Ci0t LSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfaXJxLmMKKysrIGIvZHJpdmVycy9ncHUvZHJt L2k5MTUvaTkxNV9pcnEuYwpAQCAtMjkxNCwxMiArMjkxNCw4IEBAIHN0YXRpYyB2b2lkIHNlbWFw aG9yZV9jbGVhcl9kZWFkbG9ja3Moc3RydWN0IGRybV9pOTE1X3ByaXZhdGUgKmRldl9wcml2KQog fQogCiBzdGF0aWMgZW51bSBpbnRlbF9yaW5nX2hhbmdjaGVja19hY3Rpb24KLWhlYWRfc3R1Y2so c3RydWN0IGludGVsX2VuZ2luZV9jcyAqcmluZywgdTY0IGFjdGhkKQoraGVhZF9hY3Rpb24oc3Ry dWN0IGludGVsX2VuZ2luZV9jcyAqcmluZywgdTY0IGFjdGhkKQogewotCXN0cnVjdCBkcm1fZGV2 aWNlICpkZXYgPSByaW5nLT5kZXY7Ci0Jc3RydWN0IGRybV9pOTE1X3ByaXZhdGUgKmRldl9wcml2 ID0gZGV2LT5kZXZfcHJpdmF0ZTsKLQl1MzIgaGVhZDsKLQogCWlmIChhY3RoZCAhPSByaW5nLT5o YW5nY2hlY2suYWN0aGQpIHsKIAkJaWYgKGFjdGhkID4gcmluZy0+aGFuZ2NoZWNrLm1heF9hY3Ro ZCkgewogCQkJcmluZy0+aGFuZ2NoZWNrLm1heF9hY3RoZCA9IGFjdGhkOwpAQCAtMjkyOSw2ICsy OTI1LDIxIEBAIGhlYWRfc3R1Y2soc3RydWN0IGludGVsX2VuZ2luZV9jcyAqcmluZywgdTY0IGFj dGhkKQogCQlyZXR1cm4gSEFOR0NIRUNLX0FDVElWRV9MT09QOwogCX0KIAorCXJldHVybiBIQU5H Q0hFQ0tfSFVORzsKK30KKworc3RhdGljIGVudW0gaW50ZWxfcmluZ19oYW5nY2hlY2tfYWN0aW9u CitoZWFkX3N0dWNrKHN0cnVjdCBpbnRlbF9lbmdpbmVfY3MgKnJpbmcsIHU2NCBhY3RoZCkKK3sK KwlzdHJ1Y3QgZHJtX2RldmljZSAqZGV2ID0gcmluZy0+ZGV2OworCXN0cnVjdCBkcm1faTkxNV9w cml2YXRlICpkZXZfcHJpdiA9IGRldi0+ZGV2X3ByaXZhdGU7CisJc3RhdGljIGVudW0gaW50ZWxf cmluZ19oYW5nY2hlY2tfYWN0aW9uIGhhOworCXUzMiBoZWFkLCByZXRyaWVzID0gNTsKKworCWhh ID0gaGVhZF9hY3Rpb24ocmluZywgYWN0aGQpOworCWlmIChoYSAhPSBIQU5HQ0hFQ0tfSFVORykK KwkJcmV0dXJuIGhhOworCiAJaGVhZCA9IEk5MTVfUkVBRF9IRUFEKHJpbmcpICYgSEVBRF9BRERS OwogCiAJLyogU29tZSBvcGVyYXRpb25zLCBsaWtlIHBpcGUgZmx1c2gsIGNhbiB0YWtlIGEgbG9u ZyB0aW1lLgpAQCAtMjkzOCw2ICsyOTQ5LDE3IEBAIGhlYWRfc3R1Y2soc3RydWN0IGludGVsX2Vu Z2luZV9jcyAqcmluZywgdTY0IGFjdGhkKQogCWlmIChsb3dlcl8zMl9iaXRzKGFjdGhkKSA9PSBo ZWFkKQogCQlyZXR1cm4gSEFOR0NIRUNLX0FDVElWRV9MT09QOwogCisJZG8geworCQltc2xlZXAo MjApOworCisJCXJpbmctPmhhbmdjaGVjay5hY3RoZCA9IGFjdGhkOworCQlhY3RoZCA9IGludGVs X3JpbmdfZ2V0X2FjdGl2ZV9oZWFkKHJpbmcpOworCisJCWhhID0gaGVhZF9hY3Rpb24ocmluZywg YWN0aGQpOworCQlpZiAoaGEgIT0gSEFOR0NIRUNLX0hVTkcpCisJCQlyZXR1cm4gaGE7CisJfSB3 aGlsZSAocmV0cmllcy0tKTsKKwogCXJldHVybiBIQU5HQ0hFQ0tfSFVORzsKIH0KIAotLSAKMi41 LjAKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCkludGVs LWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwOi8v bGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==