From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: [PATCH] drm/i915: Preallocate request before access of the ring Date: Mon, 29 Jun 2015 17:44:40 +0300 Message-ID: <876166y3on.fsf@intel.com> References: <1430323845-28906-1-git-send-email-yu.dai@intel.com> <55422611.7030902@intel.com> <20150506100603.GN30184@phenom.ffwll.local> <87pp4eyc97.fsf@intel.com> <55914EE5.1060300@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTP id CD0456E242 for ; Mon, 29 Jun 2015 07:42:09 -0700 (PDT) In-Reply-To: <55914EE5.1060300@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Dave Gordon , Daniel Vetter Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gTW9uLCAyOSBKdW4gMjAxNSwgRGF2ZSBHb3Jkb24gPGRhdmlkLnMuZ29yZG9uQGludGVsLmNv bT4gd3JvdGU6Cj4gT24gMjkvMDYvMTUgMTI6MzksIEphbmkgTmlrdWxhIHdyb3RlOgo+PiBPbiBX ZWQsIDA2IE1heSAyMDE1LCBEYW5pZWwgVmV0dGVyIDxkYW5pZWxAZmZ3bGwuY2g+IHdyb3RlOgo+ Pj4gT24gVGh1LCBBcHIgMzAsIDIwMTUgYXQgMDE6NTQ6NDFQTSArMDEwMCwgRGF2ZSBHb3Jkb24g d3JvdGU6Cj4+Pj4gT24gMjkvMDQvMTUgMTc6MTAsIHl1LmRhaUBpbnRlbC5jb20gd3JvdGU6Cj4+ Pj4+IEZyb206IEFsZXggRGFpIDx5dS5kYWlAaW50ZWwuY29tPgo+Pj4+Pgo+Pj4+PiBUaGlzIGlz IHRvIGF2b2lkIGJhZCBJTyBhY2Nlc3MgY2F1c2VkIGJ5IHdyaXRpbmcgTk9PUCB0byB3cmFwIHRo ZQo+Pj4+PiByaW5nIGJ1ZmZlciB3aGlsc3QgcmluZyBpcyB1bnBpbm5lZC4KPj4+Pj4KPj4+Pj4g U2lnbmVkLW9mZi1ieTogQWxleCBEYWkgPHl1LmRhaUBpbnRlbC5jb20+Cj4+Pj4+IC0tLQo+Pj4+ PiAgZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfbHJjLmMgfCA2ICsrKy0tLQo+Pj4+PiAgMSBm aWxlIGNoYW5nZWQsIDMgaW5zZXJ0aW9ucygrKSwgMyBkZWxldGlvbnMoLSkKPj4+Pj4KPj4+Pj4g ZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2xyYy5jIGIvZHJpdmVycy9n cHUvZHJtL2k5MTUvaW50ZWxfbHJjLmMKPj4+Pj4gaW5kZXggNzMyZmQ2My4uM2U4ZmNmZCAxMDA2 NDQKPj4+Pj4gLS0tIGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfbHJjLmMKPj4+Pj4gKysr IGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfbHJjLmMKPj4+Pj4gQEAgLTgwMywxMiArODAz LDEyIEBAIHN0YXRpYyBpbnQgaW50ZWxfbG9naWNhbF9yaW5nX2JlZ2luKHN0cnVjdCBpbnRlbF9y aW5nYnVmZmVyICpyaW5nYnVmLAo+Pj4+PiAgCWlmIChyZXQpCj4+Pj4+ICAJCXJldHVybiByZXQ7 Cj4+Pj4+ICAKPj4+Pj4gLQlyZXQgPSBsb2dpY2FsX3JpbmdfcHJlcGFyZShyaW5nYnVmLCBjdHgs IG51bV9kd29yZHMgKiBzaXplb2YodWludDMyX3QpKTsKPj4+Pj4gKwkvKiBQcmVhbGxvY2F0ZSB0 aGUgb2xyIGJlZm9yZSB0b3VjaGluZyB0aGUgcmluZyAqLwo+Pj4+PiArCXJldCA9IGk5MTVfZ2Vt X3JlcXVlc3RfYWxsb2MocmluZywgY3R4KTsKPj4+Pj4gIAlpZiAocmV0KQo+Pj4+PiAgCQlyZXR1 cm4gcmV0Owo+Pj4+PiAgCj4+Pj4+IC0JLyogUHJlYWxsb2NhdGUgdGhlIG9sciBiZWZvcmUgdG91 Y2hpbmcgdGhlIHJpbmcgKi8KPj4+Pj4gLQlyZXQgPSBpOTE1X2dlbV9yZXF1ZXN0X2FsbG9jKHJp bmcsIGN0eCk7Cj4+Pj4+ICsJcmV0ID0gbG9naWNhbF9yaW5nX3ByZXBhcmUocmluZ2J1ZiwgY3R4 LCBudW1fZHdvcmRzICogc2l6ZW9mKHVpbnQzMl90KSk7Cj4+Pj4+ICAJaWYgKHJldCkKPj4+Pj4g IAkJcmV0dXJuIHJldDsKPj4+Pgo+Pj4+IFJldmlld2VkLWJ5OiBEYXZlIEdvcmRvbiA8ZGF2aWQu cy5nb3Jkb25AaW50ZWwuY29tPgo+Pj4+IHdpdGggaW5wdXQgYWxzbyBmcm9tIEpvaG4gSGFycmlz b24gPGpvaG4uYy5oYXJyaXNvbkBpbnRlbC5jb20+LCB3aG8KPj4+PiB3b3VsZCBsaWtlIHRvIHBv aW50IG91dCB0aGF0IHRoaXMgd2lsbCBiZSBzdXBlcmNlZGVkIGJ5IHRoZSBBbnRpLU9MUgo+Pj4+ IHBhdGNoZXMgYWxyZWFkeSBwb3N0ZWQuIChJbiB0aGF0IG1vZGVsLCB0aGUgcmVxdWVzdCB3aWxs IGJlIGFsbG9jYXRlZAo+Pj4+IG11Y2ggZWFybGllciwgYW5kIHBhc3NlZCBhcm91bmQgZXhwbGlj aXRseSByYXRoZXIgdGhhbiBkYW5nbGluZyBmcm9tIHRoZQo+Pj4+IGNvbnRleHQpLgo+Pj4KPj4+ IERvIHdlIG5lZWQgdGhpcyBmb3IgZXhlY2xpc3QgaW4gZ2VuZXJhbCwgaS5lLiBjYzogc3RhYmxl PyBXaGVyZSdzIHRoZSBidWcKPj4+IHJlcG9ydC9pZ3QgdGVzdGNhc2U/Cj4+Pgo+Pj4gRm9yIHNl cmlvdXMtbG9va2luZyBidWdzIHBsZWFzZSBhZGQgbW9yZSBkZXRhaWxzIGxpa2UgdGhhdCB0byB0 aGUgY29tbWl0Cj4+PiBtZXNzYWdlLCBvdGhlcndpc2UgbWFpbnRhaW5lcnMgaGF2ZSBubyBpZGVh IHdoZXJlIHRvIGFwcGx5IGEgcGF0Y2guCj4+IAo+PiBBbmQgZHVlIHRvIG5vIHJlcGx5LCB0aGUg bWFpbnRhaW5lcnMgaGF2ZSBmb3Jnb3R0ZW4gYWJvdXQgcGF0Y2hlcyBsaWtlCj4+IHRoaXMuIERy b3BwaW5nIGZyb20gbXkgZml4ZXMgcXVldWUuCj4+IAo+PiBCUiwKPj4gSmFuaS4KPgo+IFRoaXMg YmVjYW1lIG9ic29sZXRlIHdpdGggdGhlIG1lcmdlIG9mIEpvaG4gSGFycmlzb24ncyBwYXRjaHNl dAo+IAkiUmVtb3ZlIHRoZSBvdXRzdGFuZGluZ19sYXp5X3JlcXVlc3QiCgpUaGFua3MuCgpCUiwK SmFuaS4KCgo+Cj4gLkRhdmUuCgotLSAKSmFuaSBOaWt1bGEsIEludGVsIE9wZW4gU291cmNlIFRl Y2hub2xvZ3kgQ2VudGVyCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9w Lm9yZwpodHRwOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwt Z2Z4Cg==