From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [Intel-gfx] [PATCH 3/5] drm: Possible lock priority escalation. Date: Mon, 27 Apr 2015 19:52:46 +0300 Message-ID: <20150427165246.GF18908@intel.com> References: <1429798078-18987-1-git-send-email-peter.antoine@intel.com> <1429798078-18987-4-git-send-email-peter.antoine@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <1429798078-18987-4-git-send-email-peter.antoine@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Peter Antoine Cc: airlied@redhat.com, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, daniel.vetter@ffwll.ch List-Id: intel-gfx@lists.freedesktop.org T24gVGh1LCBBcHIgMjMsIDIwMTUgYXQgMDM6MDc6NTZQTSArMDEwMCwgUGV0ZXIgQW50b2luZSB3 cm90ZToKPiBJZiBhbiBhcHBsaWNhdGlvbiB0aGF0IGhhcyBhIGRyaXZlciBsb2NrIGNyZWF0ZWQs IHdhbnRzIHRoZSBsb2NrIHRoZQo+IGtlcm5lbCBjb250ZXh0LCBpdCBpcyBub3QgYWxsb3dlZCB0 by4gSWYgdGhlIGNhbGwgdG8gZHJtX2xvY2sgaGFzIGEKPiBjb250ZXh0IG9mIDAsIGl0IGlzIHJl amVjdGVkLiBJZiB5b3Ugc2V0IHRoZSBjb250ZXh0IHRvIF9EUk1fTE9DS19DT05UCj4gdGhlbiBj YWxsIGRybSBsb2NrLCBpdCB3aWxsIHBhc3MgdGhlIGNvbnRleHQgPT0gRFJNX0tFUk5FTF9DT05U RVhUIGNoZWNrcy4KPiBCdXQgYXMgdGhlIERSTV9MT0NLX0NPTlQgYml0cyBhcmUgbm90IHBhcnQg b2YgdGhlIGNvbnRleHQgaWQgdGhpcyBhbGxvd3MKPiBvcGVyYXRpb25zIG9uIHRoZSBEUk1fS0VS TkVMX0NPTlRFWFQuCj4gCj4gSXNzdWU6IFZJWi01NDg1Cj4gU2lnbmVkLW9mZi1ieTogUGV0ZXIg QW50b2luZSA8cGV0ZXIuYW50b2luZUBpbnRlbC5jb20+Cj4gLS0tCj4gIGRyaXZlcnMvZ3B1L2Ry bS9kcm1fY29udGV4dC5jIHwgNiArKystLS0KPiAgZHJpdmVycy9ncHUvZHJtL2RybV9sb2NrLmMg ICAgfCA0ICsrLS0KPiAgMiBmaWxlcyBjaGFuZ2VkLCA1IGluc2VydGlvbnMoKyksIDUgZGVsZXRp b25zKC0pCj4gCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9kcm1fY29udGV4dC5jIGIv ZHJpdmVycy9ncHUvZHJtL2RybV9jb250ZXh0LmMKPiBpbmRleCA5NjM1MGQxLi4xZmViY2QzIDEw MDY0NAo+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9kcm1fY29udGV4dC5jCj4gKysrIGIvZHJpdmVy cy9ncHUvZHJtL2RybV9jb250ZXh0LmMKPiBAQCAtMTIzLDcgKzEyMyw3IEBAIHZvaWQgZHJtX2xl Z2FjeV9jdHhiaXRtYXBfZmx1c2goc3RydWN0IGRybV9kZXZpY2UgKmRldiwgc3RydWN0IGRybV9m aWxlICpmaWxlKQo+ICAKPiAgCWxpc3RfZm9yX2VhY2hfZW50cnlfc2FmZShwb3MsIHRtcCwgJmRl di0+Y3R4bGlzdCwgaGVhZCkgewo+ICAJCWlmIChwb3MtPnRhZyA9PSBmaWxlICYmCj4gLQkJICAg IHBvcy0+aGFuZGxlICE9IERSTV9LRVJORUxfQ09OVEVYVCkgewo+ICsJCSAgICBfRFJNX0xPQ0tJ TkdfQ09OVEVYVChwb3MtPmhhbmRsZSkgIT0gRFJNX0tFUk5FTF9DT05URVhUKSB7Cj4gIAkJCWlm IChkZXYtPmRyaXZlci0+Y29udGV4dF9kdG9yKQo+ICAJCQkJZGV2LT5kcml2ZXItPmNvbnRleHRf ZHRvcihkZXYsIHBvcy0+aGFuZGxlKTsKPiAgCj4gQEAgLTM0Miw3ICszNDIsNyBAQCBpbnQgZHJt X2xlZ2FjeV9hZGRjdHgoc3RydWN0IGRybV9kZXZpY2UgKmRldiwgdm9pZCAqZGF0YSwKPiAgCXN0 cnVjdCBkcm1fY3R4ICpjdHggPSBkYXRhOwo+ICAKPiAgCWN0eC0+aGFuZGxlID0gZHJtX2xlZ2Fj eV9jdHhiaXRtYXBfbmV4dChkZXYpOwo+IC0JaWYgKGN0eC0+aGFuZGxlID09IERSTV9LRVJORUxf Q09OVEVYVCkgewo+ICsJaWYgKF9EUk1fTE9DS0lOR19DT05URVhUKGN0eC0+aGFuZGxlKSA9PSBE Uk1fS0VSTkVMX0NPTlRFWFQpIHsKPiAgCQkvKiBTa2lwIGtlcm5lbCdzIGNvbnRleHQgYW5kIGdl dCBhIG5ldyBvbmUuICovCj4gIAkJY3R4LT5oYW5kbGUgPSBkcm1fbGVnYWN5X2N0eGJpdG1hcF9u ZXh0KGRldik7Cj4gIAl9Cj4gQEAgLTQ0OSw3ICs0NDksNyBAQCBpbnQgZHJtX2xlZ2FjeV9ybWN0 eChzdHJ1Y3QgZHJtX2RldmljZSAqZGV2LCB2b2lkICpkYXRhLAo+ICAJc3RydWN0IGRybV9jdHgg KmN0eCA9IGRhdGE7Cj4gIAo+ICAJRFJNX0RFQlVHKCIlZFxuIiwgY3R4LT5oYW5kbGUpOwo+IC0J aWYgKGN0eC0+aGFuZGxlICE9IERSTV9LRVJORUxfQ09OVEVYVCkgewo+ICsJaWYgKF9EUk1fTE9D S0lOR19DT05URVhUKGN0eC0+aGFuZGxlKSAhPSBEUk1fS0VSTkVMX0NPTlRFWFQpIHsKPiAgCQlp ZiAoZGV2LT5kcml2ZXItPmNvbnRleHRfZHRvcikKPiAgCQkJZGV2LT5kcml2ZXItPmNvbnRleHRf ZHRvcihkZXYsIGN0eC0+aGFuZGxlKTsKPiAgCQlkcm1fbGVnYWN5X2N0eGJpdG1hcF9mcmVlKGRl diwgY3R4LT5oYW5kbGUpOwoKSG93IGFib3V0IGp1c3QgZml4aW5nIHRoZSBlbmQgcGFyYW1ldGVy IHBhc3NlZCB0byBpZHJfYWxsb2MoKT8gQUZBSUNTCnRoYXQgd291bGQgdGFrZSBjYXJlIG9mIHRo ZSBjb250ZXh0IGNvZGUuCgpXZWxsLCB0aGVyZSBhcmUgYSBmZXcgbW9yZSBpc3N1ZXMgd2l0aCB0 aGUgY29kZToKLSBub3QgcHJvcGVybHkgY2hlY2tpbmcgZm9yIG5lZ2F0aXZlIHJldHVybiB2YWx1 ZSBmcm9tIGlkcl9hbGxvYygpCi0gbGVha2luZyB0aGUgY3R4IGlkIG9uIGttYWxsb2MoKSBlcnJv cgotIHBvaW50bGVzcyBjaGVjayBmb3IgaWRyX2FsbG9jKCkgcmV0dXJuaW5nIDAgZXZlbiB0aG91 Z2ggdGhlIG1pbiBpcyAxCgo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vZHJtX2xvY2su YyBiL2RyaXZlcnMvZ3B1L2RybS9kcm1fbG9jay5jCj4gaW5kZXggMDcwZGQ1ZC4uOTQ1MDA5MzAg MTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUvZHJtL2RybV9sb2NrLmMKPiArKysgYi9kcml2ZXJz L2dwdS9kcm0vZHJtX2xvY2suYwo+IEBAIC02Myw3ICs2Myw3IEBAIGludCBkcm1fbGVnYWN5X2xv Y2soc3RydWN0IGRybV9kZXZpY2UgKmRldiwgdm9pZCAqZGF0YSwKPiAgCj4gIAkrK2ZpbGVfcHJp di0+bG9ja19jb3VudDsKCldoaWxlIHlvdSdyZSBwb2tpbmcgYXJvdW5kIHRoaXMgZHVuZ2VvcG4s IG1heWJlIHlvdSBjYW4ga2lsbCBsb2NrX2NvdW50PwpXZSBuZXZlciBzZWVtIHRvIGRlY3JlbWVu dCBpdCwgYW5kIGl0J3Mgb25seSBjaGVja2VkIGluIGRybV9sZWdhY3lfaV9oYXZlX2h3X2xvY2so KS4KCj4gIAo+IC0JaWYgKGxvY2stPmNvbnRleHQgPT0gRFJNX0tFUk5FTF9DT05URVhUKSB7Cj4g KwlpZiAoX0RSTV9MT0NLSU5HX0NPTlRFWFQobG9jay0+Y29udGV4dCkgPT0gRFJNX0tFUk5FTF9D T05URVhUKSB7Cj4gIAkJRFJNX0VSUk9SKCJQcm9jZXNzICVkIHVzaW5nIGtlcm5lbCBjb250ZXh0 ICVkXG4iLAo+ICAJCQkgIHRhc2tfcGlkX25yKGN1cnJlbnQpLCBsb2NrLT5jb250ZXh0KTsKPiAg CQlyZXR1cm4gLUVJTlZBTDsKPiBAQCAtMTUzLDcgKzE1Myw3IEBAIGludCBkcm1fbGVnYWN5X3Vu bG9jayhzdHJ1Y3QgZHJtX2RldmljZSAqZGV2LCB2b2lkICpkYXRhLCBzdHJ1Y3QgZHJtX2ZpbGUg KmZpbGVfCj4gIAlzdHJ1Y3QgZHJtX2xvY2sgKmxvY2sgPSBkYXRhOwo+ICAJc3RydWN0IGRybV9t YXN0ZXIgKm1hc3RlciA9IGZpbGVfcHJpdi0+bWFzdGVyOwo+ICAKPiAtCWlmIChsb2NrLT5jb250 ZXh0ID09IERSTV9LRVJORUxfQ09OVEVYVCkgewo+ICsJaWYgKF9EUk1fTE9DS0lOR19DT05URVhU KGxvY2stPmNvbnRleHQpID09IERSTV9LRVJORUxfQ09OVEVYVCkgewo+ICAJCURSTV9FUlJPUigi UHJvY2VzcyAlZCB1c2luZyBrZXJuZWwgY29udGV4dCAlZFxuIiwKPiAgCQkJICB0YXNrX3BpZF9u cihjdXJyZW50KSwgbG9jay0+Y29udGV4dCk7Cj4gIAkJcmV0dXJuIC1FSU5WQUw7CgpUaGVzZSB0 d28gY2hhbmdlcyBsb29rIE9LIHRvIG1lLgoKPiAtLSAKPiAxLjkuMQo+IAo+IF9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCj4gSW50ZWwtZ2Z4IG1haWxpbmcg bGlzdAo+IEludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKPiBodHRwOi8vbGlzdHMuZnJl ZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4CgotLSAKVmlsbGUgU3lyasOk bMOkCkludGVsIE9UQwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fXwpkcmktZGV2ZWwgbWFpbGluZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5v cmcKaHR0cDovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZl bAo=