From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lucas Stach Subject: [PATCH RFC 027/111] staging: etnaviv: ensure that ring buffer wraps Date: Thu, 2 Apr 2015 17:29:29 +0200 Message-ID: <1427988653-754-28-git-send-email-l.stach@pengutronix.de> References: <1427988653-754-1-git-send-email-l.stach@pengutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [92.198.50.35]) by gabe.freedesktop.org (Postfix) with ESMTP id 7AC036EA44 for ; Thu, 2 Apr 2015 08:30:57 -0700 (PDT) In-Reply-To: <1427988653-754-1-git-send-email-l.stach@pengutronix.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org Cc: Russell King , kernel@pengutronix.de List-Id: dri-devel@lists.freedesktop.org RnJvbTogUnVzc2VsbCBLaW5nIDxybWsra2VybmVsQGFybS5saW51eC5vcmcudWs+CgpFbnN1cmUg dGhhdCB0aGUgcmluZyBidWZmZXIgd3JhcHMgd2hlbiB3ZSBmaWxsIHRoZSBidWZmZXIuCgpTaWdu ZWQtb2ZmLWJ5OiBSdXNzZWxsIEtpbmcgPHJtaytrZXJuZWxAYXJtLmxpbnV4Lm9yZy51az4KLS0t CiBkcml2ZXJzL3N0YWdpbmcvZXRuYXZpdi9ldG5hdml2X2J1ZmZlci5jIHwgOCArKysrKysrLQog MSBmaWxlIGNoYW5nZWQsIDcgaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlvbigtKQoKZGlmZiAtLWdp dCBhL2RyaXZlcnMvc3RhZ2luZy9ldG5hdml2L2V0bmF2aXZfYnVmZmVyLmMgYi9kcml2ZXJzL3N0 YWdpbmcvZXRuYXZpdi9ldG5hdml2X2J1ZmZlci5jCmluZGV4IGE5M2Q1MDkxODI4ZS4uYThiNDJh MWVjN2RiIDEwMDY0NAotLS0gYS9kcml2ZXJzL3N0YWdpbmcvZXRuYXZpdi9ldG5hdml2X2J1ZmZl ci5jCisrKyBiL2RyaXZlcnMvc3RhZ2luZy9ldG5hdml2L2V0bmF2aXZfYnVmZmVyLmMKQEAgLTMw LDcgKzMwLDcgQEAKIHN0YXRpYyBpbmxpbmUgdm9pZCBPVVQoc3RydWN0IGV0bmF2aXZfZ2VtX29i amVjdCAqYnVmZmVyLCB1aW50MzJfdCBkYXRhKQogewogCXUzMiAqdmFkZHIgPSAodTMyICopYnVm ZmVyLT52YWRkcjsKLQlCVUdfT04oYnVmZmVyLT5vZmZzZXQgKiBzaXplb2YoKnZhZGRyKSA+PSBi dWZmZXItPmJhc2Uuc2l6ZSk7CisJQlVHX09OKGJ1ZmZlci0+b2Zmc2V0ID49IGJ1ZmZlci0+YmFz ZS5zaXplIC8gc2l6ZW9mKCp2YWRkcikpOwogCiAJdmFkZHJbYnVmZmVyLT5vZmZzZXQrK10gPSBk YXRhOwogfQpAQCAtMTU0LDYgKzE1NCwxMiBAQCB2b2lkIGV0bmF2aXZfYnVmZmVyX3F1ZXVlKHN0 cnVjdCBldG5hdml2X2dwdSAqZ3B1LCB1bnNpZ25lZCBpbnQgZXZlbnQsIHN0cnVjdCBldAogCWlm IChkcm1fZGVidWcgJiBEUk1fVVRfRFJJVkVSKQogCQlldG5hdml2X2J1ZmZlcl9kdW1wKGdwdSwg YnVmZmVyLCAwLCAweDUwKTsKIAorCS8qCisJICogaWYgd2UgYXJlIGdvaW5nIHRvIGNvbXBsZXRl bHkgb3ZlcmZsb3cgdGhlIGJ1ZmZlciwgd2UgbmVlZCB0byB3cmFwLgorCSAqLworCWlmIChidWZm ZXItPm9mZnNldCArIDYgPiBidWZmZXItPmJhc2Uuc2l6ZSAvIHNpemVvZih1aW50MzJfdCkpCisJ CWJ1ZmZlci0+b2Zmc2V0ID0gMDsKKwogCS8qIHNhdmUgb2Zmc2V0IGJhY2sgaW50byBtYWluIGJ1 ZmZlciAqLwogCWJhY2sgPSBidWZmZXItPm9mZnNldDsKIAlsaW5rX3RhcmdldCA9IGJ1ZmZlci0+ cGFkZHIgKyBidWZmZXItPm9mZnNldCAqIDQ7Ci0tIAoyLjEuNAoKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmkt ZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcv bWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK