From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Antoine Subject: [PATCH 3/5] drm: Possible lock priority escalation. Date: Thu, 23 Apr 2015 15:07:56 +0100 Message-ID: <1429798078-18987-4-git-send-email-peter.antoine@intel.com> References: <1429798078-18987-1-git-send-email-peter.antoine@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1429798078-18987-1-git-send-email-peter.antoine@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: airlied@redhat.com, dri-devel@lists.freedesktop.org, daniel.vetter@ffwll.ch List-Id: dri-devel@lists.freedesktop.org SWYgYW4gYXBwbGljYXRpb24gdGhhdCBoYXMgYSBkcml2ZXIgbG9jayBjcmVhdGVkLCB3YW50cyB0 aGUgbG9jayB0aGUKa2VybmVsIGNvbnRleHQsIGl0IGlzIG5vdCBhbGxvd2VkIHRvLiBJZiB0aGUg Y2FsbCB0byBkcm1fbG9jayBoYXMgYQpjb250ZXh0IG9mIDAsIGl0IGlzIHJlamVjdGVkLiBJZiB5 b3Ugc2V0IHRoZSBjb250ZXh0IHRvIF9EUk1fTE9DS19DT05UCnRoZW4gY2FsbCBkcm0gbG9jaywg aXQgd2lsbCBwYXNzIHRoZSBjb250ZXh0ID09IERSTV9LRVJORUxfQ09OVEVYVCBjaGVja3MuCkJ1 dCBhcyB0aGUgRFJNX0xPQ0tfQ09OVCBiaXRzIGFyZSBub3QgcGFydCBvZiB0aGUgY29udGV4dCBp ZCB0aGlzIGFsbG93cwpvcGVyYXRpb25zIG9uIHRoZSBEUk1fS0VSTkVMX0NPTlRFWFQuCgpJc3N1 ZTogVklaLTU0ODUKU2lnbmVkLW9mZi1ieTogUGV0ZXIgQW50b2luZSA8cGV0ZXIuYW50b2luZUBp bnRlbC5jb20+Ci0tLQogZHJpdmVycy9ncHUvZHJtL2RybV9jb250ZXh0LmMgfCA2ICsrKy0tLQog ZHJpdmVycy9ncHUvZHJtL2RybV9sb2NrLmMgICAgfCA0ICsrLS0KIDIgZmlsZXMgY2hhbmdlZCwg NSBpbnNlcnRpb25zKCspLCA1IGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1 L2RybS9kcm1fY29udGV4dC5jIGIvZHJpdmVycy9ncHUvZHJtL2RybV9jb250ZXh0LmMKaW5kZXgg OTYzNTBkMS4uMWZlYmNkMyAxMDA2NDQKLS0tIGEvZHJpdmVycy9ncHUvZHJtL2RybV9jb250ZXh0 LmMKKysrIGIvZHJpdmVycy9ncHUvZHJtL2RybV9jb250ZXh0LmMKQEAgLTEyMyw3ICsxMjMsNyBA QCB2b2lkIGRybV9sZWdhY3lfY3R4Yml0bWFwX2ZsdXNoKHN0cnVjdCBkcm1fZGV2aWNlICpkZXYs IHN0cnVjdCBkcm1fZmlsZSAqZmlsZSkKIAogCWxpc3RfZm9yX2VhY2hfZW50cnlfc2FmZShwb3Ms IHRtcCwgJmRldi0+Y3R4bGlzdCwgaGVhZCkgewogCQlpZiAocG9zLT50YWcgPT0gZmlsZSAmJgot CQkgICAgcG9zLT5oYW5kbGUgIT0gRFJNX0tFUk5FTF9DT05URVhUKSB7CisJCSAgICBfRFJNX0xP Q0tJTkdfQ09OVEVYVChwb3MtPmhhbmRsZSkgIT0gRFJNX0tFUk5FTF9DT05URVhUKSB7CiAJCQlp ZiAoZGV2LT5kcml2ZXItPmNvbnRleHRfZHRvcikKIAkJCQlkZXYtPmRyaXZlci0+Y29udGV4dF9k dG9yKGRldiwgcG9zLT5oYW5kbGUpOwogCkBAIC0zNDIsNyArMzQyLDcgQEAgaW50IGRybV9sZWdh Y3lfYWRkY3R4KHN0cnVjdCBkcm1fZGV2aWNlICpkZXYsIHZvaWQgKmRhdGEsCiAJc3RydWN0IGRy bV9jdHggKmN0eCA9IGRhdGE7CiAKIAljdHgtPmhhbmRsZSA9IGRybV9sZWdhY3lfY3R4Yml0bWFw X25leHQoZGV2KTsKLQlpZiAoY3R4LT5oYW5kbGUgPT0gRFJNX0tFUk5FTF9DT05URVhUKSB7CisJ aWYgKF9EUk1fTE9DS0lOR19DT05URVhUKGN0eC0+aGFuZGxlKSA9PSBEUk1fS0VSTkVMX0NPTlRF WFQpIHsKIAkJLyogU2tpcCBrZXJuZWwncyBjb250ZXh0IGFuZCBnZXQgYSBuZXcgb25lLiAqLwog CQljdHgtPmhhbmRsZSA9IGRybV9sZWdhY3lfY3R4Yml0bWFwX25leHQoZGV2KTsKIAl9CkBAIC00 NDksNyArNDQ5LDcgQEAgaW50IGRybV9sZWdhY3lfcm1jdHgoc3RydWN0IGRybV9kZXZpY2UgKmRl diwgdm9pZCAqZGF0YSwKIAlzdHJ1Y3QgZHJtX2N0eCAqY3R4ID0gZGF0YTsKIAogCURSTV9ERUJV RygiJWRcbiIsIGN0eC0+aGFuZGxlKTsKLQlpZiAoY3R4LT5oYW5kbGUgIT0gRFJNX0tFUk5FTF9D T05URVhUKSB7CisJaWYgKF9EUk1fTE9DS0lOR19DT05URVhUKGN0eC0+aGFuZGxlKSAhPSBEUk1f S0VSTkVMX0NPTlRFWFQpIHsKIAkJaWYgKGRldi0+ZHJpdmVyLT5jb250ZXh0X2R0b3IpCiAJCQlk ZXYtPmRyaXZlci0+Y29udGV4dF9kdG9yKGRldiwgY3R4LT5oYW5kbGUpOwogCQlkcm1fbGVnYWN5 X2N0eGJpdG1hcF9mcmVlKGRldiwgY3R4LT5oYW5kbGUpOwpkaWZmIC0tZ2l0IGEvZHJpdmVycy9n cHUvZHJtL2RybV9sb2NrLmMgYi9kcml2ZXJzL2dwdS9kcm0vZHJtX2xvY2suYwppbmRleCAwNzBk ZDVkLi45NDUwMDkzMCAxMDA2NDQKLS0tIGEvZHJpdmVycy9ncHUvZHJtL2RybV9sb2NrLmMKKysr IGIvZHJpdmVycy9ncHUvZHJtL2RybV9sb2NrLmMKQEAgLTYzLDcgKzYzLDcgQEAgaW50IGRybV9s ZWdhY3lfbG9jayhzdHJ1Y3QgZHJtX2RldmljZSAqZGV2LCB2b2lkICpkYXRhLAogCiAJKytmaWxl X3ByaXYtPmxvY2tfY291bnQ7CiAKLQlpZiAobG9jay0+Y29udGV4dCA9PSBEUk1fS0VSTkVMX0NP TlRFWFQpIHsKKwlpZiAoX0RSTV9MT0NLSU5HX0NPTlRFWFQobG9jay0+Y29udGV4dCkgPT0gRFJN X0tFUk5FTF9DT05URVhUKSB7CiAJCURSTV9FUlJPUigiUHJvY2VzcyAlZCB1c2luZyBrZXJuZWwg Y29udGV4dCAlZFxuIiwKIAkJCSAgdGFza19waWRfbnIoY3VycmVudCksIGxvY2stPmNvbnRleHQp OwogCQlyZXR1cm4gLUVJTlZBTDsKQEAgLTE1Myw3ICsxNTMsNyBAQCBpbnQgZHJtX2xlZ2FjeV91 bmxvY2soc3RydWN0IGRybV9kZXZpY2UgKmRldiwgdm9pZCAqZGF0YSwgc3RydWN0IGRybV9maWxl ICpmaWxlXwogCXN0cnVjdCBkcm1fbG9jayAqbG9jayA9IGRhdGE7CiAJc3RydWN0IGRybV9tYXN0 ZXIgKm1hc3RlciA9IGZpbGVfcHJpdi0+bWFzdGVyOwogCi0JaWYgKGxvY2stPmNvbnRleHQgPT0g RFJNX0tFUk5FTF9DT05URVhUKSB7CisJaWYgKF9EUk1fTE9DS0lOR19DT05URVhUKGxvY2stPmNv bnRleHQpID09IERSTV9LRVJORUxfQ09OVEVYVCkgewogCQlEUk1fRVJST1IoIlByb2Nlc3MgJWQg dXNpbmcga2VybmVsIGNvbnRleHQgJWRcbiIsCiAJCQkgIHRhc2tfcGlkX25yKGN1cnJlbnQpLCBs b2NrLT5jb250ZXh0KTsKIAkJcmV0dXJuIC1FSU5WQUw7Ci0tIAoxLjkuMQoKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlz dApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVza3Rv cC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK