From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 92543C433E0 for ; Mon, 22 Mar 2021 16:06:59 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 33F59619B5 for ; Mon, 22 Mar 2021 16:06:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 33F59619B5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=ath11k-bounces+ath11k=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=qKsrr1WRKs7tanPlW0OKH+Y1cGk0P18czhW+lN+CEpc=; b=W5k5RfXi2lU7NYdHW8uKa5mqt iDHKWf/nBRTznkdT2BFKfUgW/R37pnFdklz8PYawbU56O0MoHLA97+BD4atJTsTGuBG3Ss56EPbpH qPrz3dqVDyTwjhe7H828G4yzp6SjgS49t45tTvT4tIg5X6/ht+YYwJLoPsogKVHUjp/Bw2QnO8z2l YIXcjvCZEdGerh9fqsZrNDWfiGMbdcrvEq0G9mNTm2Duo03c77MmBUcOEybSTfPlPTifGNWL1cx1Y KA4nJuzNsAUAgo4///fB/CrmdFzpNW9FRD8i37t3b205v/bdRMdWZ0F0l3CUGOs1MAeAiD8rKe+0i tZ+5fUr5w==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lON4s-00ByQA-BU; Mon, 22 Mar 2021 16:06:50 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lON3b-00Bxtm-Jp; Mon, 22 Mar 2021 16:05:35 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9E526619B3; Mon, 22 Mar 2021 16:05:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616429130; bh=Cz6Ib/Jy2MCBRG3RkrW7YxIgzj/6kEv+v4DuuyruVdM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YmX1KQkIWDTM9oL9SIaizhQuXBgId2TgjaOHRvpRa8ujB1Hj1aOwCgrCrMNJVi2gq P8VgokfOwAmfnYZLX1rsRk4pLvkeDX2bspNuX1VYi25/JXoxXtnn7F2MgFWC0FsAFu N+uQuJ3Me21QeU0KrCs4aFbaBIGeJwlctHwPj1pA51MBMY2ra+UvbFh+zl+P+BsSj9 1ElKemq6Wxa1TUdo/FGf/LywTMYZxZt3573Q+qI3GKdCXVd48krzSZHquQETNI++01 tCB8r6B7NO2iohCFFlGopnfYJGFYOD5rOpt+nJhCejnPW+cx72ztkTHm7tbHkrEoPf S1/KeKBMSo8Ag== From: Arnd Bergmann To: linux-kernel@vger.kernel.org, Martin Sebor , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter Cc: Arnd Bergmann , x86@kernel.org, Ning Sun , Kalle Valo , Simon Kelley , James Smart , "James E.J. Bottomley" , Anders Larsen , Tejun Heo , Serge Hallyn , Imre Deak , linux-arm-kernel@lists.infradead.org, tboot-devel@lists.sourceforge.net, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-scsi@vger.kernel.org, cgroups@vger.kernel.org, linux-security-module@vger.kernel.org, Chris Wilson , =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Matt Roper , Aditya Swarup Subject: [PATCH 10/11] drm/i915: avoid stringop-overread warning on pri_latency Date: Mon, 22 Mar 2021 17:02:48 +0100 Message-Id: <20210322160253.4032422-11-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210322160253.4032422-1-arnd@kernel.org> References: <20210322160253.4032422-1-arnd@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210322_160533_568125_AE4B4A1C X-CRM114-Status: GOOD ( 14.99 ) X-BeenThere: ath11k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "ath11k" Errors-To: ath11k-bounces+ath11k=archiver.kernel.org@lists.infradead.org RnJvbTogQXJuZCBCZXJnbWFubiA8YXJuZEBhcm5kYi5kZT4KCmdjYy0xMSB3YXJucyBhYm91dCB3 aGF0IGFwcGVhcnMgdG8gYmUgYW4gb3V0LW9mLXJhbmdlIGFycmF5IGFjY2VzczoKCkluIGZ1bmN0 aW9uIOKAmHNuYl93bV9sYXRlbmN5X3F1aXJr4oCZLAogICAgaW5saW5lZCBmcm9tIOKAmGlsa19z ZXR1cF93bV9sYXRlbmN54oCZIGF0IGRyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3BtLmM6MzEw ODozOgpkcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9wbS5jOjMwNTc6OTogZXJyb3I6IOKAmGlu dGVsX3ByaW50X3dtX2xhdGVuY3nigJkgcmVhZGluZyAxNiBieXRlcyBmcm9tIGEgcmVnaW9uIG9m IHNpemUgMTAgWy1XZXJyb3I9c3RyaW5nb3Atb3ZlcnJlYWRdCiAzMDU3IHwgICAgICAgICBpbnRl bF9wcmludF93bV9sYXRlbmN5KGRldl9wcml2LCAiUHJpbWFyeSIsIGRldl9wcml2LT53bS5wcmlf bGF0ZW5jeSk7CiAgICAgIHwgICAgICAgICBefn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+ fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn4KZHJpdmVycy9ncHUvZHJtL2k5 MTUvaW50ZWxfcG0uYzogSW4gZnVuY3Rpb24g4oCYaWxrX3NldHVwX3dtX2xhdGVuY3nigJk6CmRy aXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3BtLmM6MzA1Nzo5OiBub3RlOiByZWZlcmVuY2luZyBh cmd1bWVudCAzIG9mIHR5cGUg4oCYY29uc3QgdTE2ICrigJkge2FrYSDigJhjb25zdCBzaG9ydCB1 bnNpZ25lZCBpbnQgKuKAmX0KZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfcG0uYzoyOTk0OjEz OiBub3RlOiBpbiBhIGNhbGwgdG8gZnVuY3Rpb24g4oCYaW50ZWxfcHJpbnRfd21fbGF0ZW5jeeKA mQogMjk5NCB8IHN0YXRpYyB2b2lkIGludGVsX3ByaW50X3dtX2xhdGVuY3koc3RydWN0IGRybV9p OTE1X3ByaXZhdGUgKmRldl9wcml2LAogICAgICB8ICAgICAgICAgICAgIF5+fn5+fn5+fn5+fn5+ fn5+fn5+fn4KCk15IGd1ZXNzIGlzIHRoYXQgdGhpcyBjb2RlIGlzIGFjdHVhbGx5IHNhZmUgYmVj YXVzZSB0aGUgc2l6ZSBvZiB0aGUKYXJyYXkgZGVwZW5kcyBvbiB0aGUgaGFyZHdhcmUgZ2VuZXJh dGlvbiwgYW5kIHRoZSBmdW5jdGlvbiBjaGVja3MgZm9yCnRoYXQsIGJ1dCBhdCB0aGUgc2FtZSB0 aW1lIEkgd291bGQgbm90IGV4cGVjdCB0aGUgY29tcGlsZXIgdG8gd29yayBpdApvdXQgY29ycmVj dGx5LCBhbmQgdGhlIGNvZGUgc2VlbXMgYSBsaXR0bGUgZnJhZ2lsZSB3aXRoIHJlZ2FyZHMgdG8K ZnV0dXJlIGNoYW5nZXMuIFNpbXBseSBpbmNyZWFzaW5nIHRoZSBzaXplIG9mIHRoZSBhcnJheSBz aG91bGQgaGVscC4KClNpZ25lZC1vZmYtYnk6IEFybmQgQmVyZ21hbm4gPGFybmRAYXJuZGIuZGU+ Ci0tLQogZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9kcnYuaCB8IDYgKysrLS0tCiAxIGZpbGUg Y2hhbmdlZCwgMyBpbnNlcnRpb25zKCspLCAzIGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL2Ry aXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZHJ2LmggYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1 X2Rydi5oCmluZGV4IDI2ZDY5ZDA2YWE2ZC4uMzU2NzYwMmUwYTM1IDEwMDY0NAotLS0gYS9kcml2 ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2Rydi5oCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5 MTVfZHJ2LmgKQEAgLTEwOTUsMTEgKzEwOTUsMTEgQEAgc3RydWN0IGRybV9pOTE1X3ByaXZhdGUg ewogCQkgKiBpbiAwLjV1cyB1bml0cyBmb3IgV00xKy4KIAkJICovCiAJCS8qIHByaW1hcnkgKi8K LQkJdTE2IHByaV9sYXRlbmN5WzVdOworCQl1MTYgcHJpX2xhdGVuY3lbOF07CiAJCS8qIHNwcml0 ZSAqLwotCQl1MTYgc3ByX2xhdGVuY3lbNV07CisJCXUxNiBzcHJfbGF0ZW5jeVs4XTsKIAkJLyog Y3Vyc29yICovCi0JCXUxNiBjdXJfbGF0ZW5jeVs1XTsKKwkJdTE2IGN1cl9sYXRlbmN5WzhdOwog CQkvKgogCQkgKiBSYXcgd2F0ZXJtYXJrIG1lbW9yeSBsYXRlbmN5IHZhbHVlcwogCQkgKiBmb3Ig U0tMIGZvciBhbGwgOCBsZXZlbHMKLS0gCjIuMjkuMgoKCi0tIAphdGgxMWsgbWFpbGluZyBsaXN0 CmF0aDExa0BsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21h aWxtYW4vbGlzdGluZm8vYXRoMTFrCg== From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: [PATCH 10/11] drm/i915: avoid stringop-overread warning on pri_latency Date: Mon, 22 Mar 2021 17:02:48 +0100 Message-ID: <20210322160253.4032422-11-arnd@kernel.org> References: <20210322160253.4032422-1-arnd@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616429130; bh=Cz6Ib/Jy2MCBRG3RkrW7YxIgzj/6kEv+v4DuuyruVdM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YmX1KQkIWDTM9oL9SIaizhQuXBgId2TgjaOHRvpRa8ujB1Hj1aOwCgrCrMNJVi2gq P8VgokfOwAmfnYZLX1rsRk4pLvkeDX2bspNuX1VYi25/JXoxXtnn7F2MgFWC0FsAFu N+uQuJ3Me21QeU0KrCs4aFbaBIGeJwlctHwPj1pA51MBMY2ra+UvbFh+zl+P+BsSj9 1ElKemq6Wxa1TUdo/FGf/LywTMYZxZt3573Q+qI3GKdCXVd48krzSZHquQETNI++01 tCB8r6B7NO2iohCFFlGopnfYJGFYOD5rOpt+nJhCejnPW+cx72ztkTHm7tbHkrEoPf S1/KeKBMSo8Ag== In-Reply-To: <20210322160253.4032422-1-arnd@kernel.org> List-ID: Content-Type: text/plain; charset="utf-8" To: linux-kernel@vger.kernel.org, Martin Sebor , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter Cc: Arnd Bergmann , x86@kernel.org, Ning Sun , Kalle Valo , Simon Kelley , James Smart , "James E.J. Bottomley" , Anders Larsen , Tejun Heo , Serge Hallyn , Imre Deak , linux-arm-kernel@lists.infradead.org, tboot-devel@lists.sourceforge.net, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-scsi@vger.kernel.org, cgroups@vger.kernel.org, linux-security-module@vger.kernel.org, Chris Wilson , =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= From: Arnd Bergmann gcc-11 warns about what appears to be an out-of-range array access: In function ‘snb_wm_latency_quirk’, inlined from ‘ilk_setup_wm_latency’ at drivers/gpu/drm/i915/intel_pm.c:3108:3: drivers/gpu/drm/i915/intel_pm.c:3057:9: error: ‘intel_print_wm_latency’ reading 16 bytes from a region of size 10 [-Werror=stringop-overread] 3057 | intel_print_wm_latency(dev_priv, "Primary", dev_priv->wm.pri_latency); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/intel_pm.c: In function ‘ilk_setup_wm_latency’: drivers/gpu/drm/i915/intel_pm.c:3057:9: note: referencing argument 3 of type ‘const u16 *’ {aka ‘const short unsigned int *’} drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function ‘intel_print_wm_latency’ 2994 | static void intel_print_wm_latency(struct drm_i915_private *dev_priv, | ^~~~~~~~~~~~~~~~~~~~~~ My guess is that this code is actually safe because the size of the array depends on the hardware generation, and the function checks for that, but at the same time I would not expect the compiler to work it out correctly, and the code seems a little fragile with regards to future changes. Simply increasing the size of the array should help. Signed-off-by: Arnd Bergmann --- drivers/gpu/drm/i915/i915_drv.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 26d69d06aa6d..3567602e0a35 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1095,11 +1095,11 @@ struct drm_i915_private { * in 0.5us units for WM1+. */ /* primary */ - u16 pri_latency[5]; + u16 pri_latency[8]; /* sprite */ - u16 spr_latency[5]; + u16 spr_latency[8]; /* cursor */ - u16 cur_latency[5]; + u16 cur_latency[8]; /* * Raw watermark memory latency values * for SKL for all 8 levels -- 2.29.2 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7200CC433E0 for ; Mon, 22 Mar 2021 18:17:56 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 333B961992 for ; Mon, 22 Mar 2021 18:17:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 333B961992 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B96716E151; Mon, 22 Mar 2021 18:17:55 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id B37206E508; Mon, 22 Mar 2021 16:05:32 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 9E526619B3; Mon, 22 Mar 2021 16:05:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616429130; bh=Cz6Ib/Jy2MCBRG3RkrW7YxIgzj/6kEv+v4DuuyruVdM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YmX1KQkIWDTM9oL9SIaizhQuXBgId2TgjaOHRvpRa8ujB1Hj1aOwCgrCrMNJVi2gq P8VgokfOwAmfnYZLX1rsRk4pLvkeDX2bspNuX1VYi25/JXoxXtnn7F2MgFWC0FsAFu N+uQuJ3Me21QeU0KrCs4aFbaBIGeJwlctHwPj1pA51MBMY2ra+UvbFh+zl+P+BsSj9 1ElKemq6Wxa1TUdo/FGf/LywTMYZxZt3573Q+qI3GKdCXVd48krzSZHquQETNI++01 tCB8r6B7NO2iohCFFlGopnfYJGFYOD5rOpt+nJhCejnPW+cx72ztkTHm7tbHkrEoPf S1/KeKBMSo8Ag== From: Arnd Bergmann To: linux-kernel@vger.kernel.org, Martin Sebor , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter Date: Mon, 22 Mar 2021 17:02:48 +0100 Message-Id: <20210322160253.4032422-11-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210322160253.4032422-1-arnd@kernel.org> References: <20210322160253.4032422-1-arnd@kernel.org> MIME-Version: 1.0 X-Mailman-Approved-At: Mon, 22 Mar 2021 18:17:39 +0000 Subject: [Intel-gfx] [PATCH 10/11] drm/i915: avoid stringop-overread warning on pri_latency X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dri-devel@lists.freedesktop.org, Chris Wilson , linux-scsi@vger.kernel.org, x86@kernel.org, James Smart , tboot-devel@lists.sourceforge.net, Kalle Valo , ath11k@lists.infradead.org, Serge Hallyn , Arnd Bergmann , "James E.J. Bottomley" , Ning Sun , Anders Larsen , cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-security-module@vger.kernel.org, Tejun Heo , Simon Kelley , intel-gfx@lists.freedesktop.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" RnJvbTogQXJuZCBCZXJnbWFubiA8YXJuZEBhcm5kYi5kZT4KCmdjYy0xMSB3YXJucyBhYm91dCB3 aGF0IGFwcGVhcnMgdG8gYmUgYW4gb3V0LW9mLXJhbmdlIGFycmF5IGFjY2VzczoKCkluIGZ1bmN0 aW9uIOKAmHNuYl93bV9sYXRlbmN5X3F1aXJr4oCZLAogICAgaW5saW5lZCBmcm9tIOKAmGlsa19z ZXR1cF93bV9sYXRlbmN54oCZIGF0IGRyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3BtLmM6MzEw ODozOgpkcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9wbS5jOjMwNTc6OTogZXJyb3I6IOKAmGlu dGVsX3ByaW50X3dtX2xhdGVuY3nigJkgcmVhZGluZyAxNiBieXRlcyBmcm9tIGEgcmVnaW9uIG9m IHNpemUgMTAgWy1XZXJyb3I9c3RyaW5nb3Atb3ZlcnJlYWRdCiAzMDU3IHwgICAgICAgICBpbnRl bF9wcmludF93bV9sYXRlbmN5KGRldl9wcml2LCAiUHJpbWFyeSIsIGRldl9wcml2LT53bS5wcmlf bGF0ZW5jeSk7CiAgICAgIHwgICAgICAgICBefn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+ fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn5+fn4KZHJpdmVycy9ncHUvZHJtL2k5 MTUvaW50ZWxfcG0uYzogSW4gZnVuY3Rpb24g4oCYaWxrX3NldHVwX3dtX2xhdGVuY3nigJk6CmRy aXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3BtLmM6MzA1Nzo5OiBub3RlOiByZWZlcmVuY2luZyBh cmd1bWVudCAzIG9mIHR5cGUg4oCYY29uc3QgdTE2ICrigJkge2FrYSDigJhjb25zdCBzaG9ydCB1 bnNpZ25lZCBpbnQgKuKAmX0KZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfcG0uYzoyOTk0OjEz OiBub3RlOiBpbiBhIGNhbGwgdG8gZnVuY3Rpb24g4oCYaW50ZWxfcHJpbnRfd21fbGF0ZW5jeeKA mQogMjk5NCB8IHN0YXRpYyB2b2lkIGludGVsX3ByaW50X3dtX2xhdGVuY3koc3RydWN0IGRybV9p OTE1X3ByaXZhdGUgKmRldl9wcml2LAogICAgICB8ICAgICAgICAgICAgIF5+fn5+fn5+fn5+fn5+ fn5+fn5+fn4KCk15IGd1ZXNzIGlzIHRoYXQgdGhpcyBjb2RlIGlzIGFjdHVhbGx5IHNhZmUgYmVj YXVzZSB0aGUgc2l6ZSBvZiB0aGUKYXJyYXkgZGVwZW5kcyBvbiB0aGUgaGFyZHdhcmUgZ2VuZXJh dGlvbiwgYW5kIHRoZSBmdW5jdGlvbiBjaGVja3MgZm9yCnRoYXQsIGJ1dCBhdCB0aGUgc2FtZSB0 aW1lIEkgd291bGQgbm90IGV4cGVjdCB0aGUgY29tcGlsZXIgdG8gd29yayBpdApvdXQgY29ycmVj dGx5LCBhbmQgdGhlIGNvZGUgc2VlbXMgYSBsaXR0bGUgZnJhZ2lsZSB3aXRoIHJlZ2FyZHMgdG8K ZnV0dXJlIGNoYW5nZXMuIFNpbXBseSBpbmNyZWFzaW5nIHRoZSBzaXplIG9mIHRoZSBhcnJheSBz aG91bGQgaGVscC4KClNpZ25lZC1vZmYtYnk6IEFybmQgQmVyZ21hbm4gPGFybmRAYXJuZGIuZGU+ Ci0tLQogZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9kcnYuaCB8IDYgKysrLS0tCiAxIGZpbGUg Y2hhbmdlZCwgMyBpbnNlcnRpb25zKCspLCAzIGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL2Ry aXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZHJ2LmggYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1 X2Rydi5oCmluZGV4IDI2ZDY5ZDA2YWE2ZC4uMzU2NzYwMmUwYTM1IDEwMDY0NAotLS0gYS9kcml2 ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2Rydi5oCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5 MTVfZHJ2LmgKQEAgLTEwOTUsMTEgKzEwOTUsMTEgQEAgc3RydWN0IGRybV9pOTE1X3ByaXZhdGUg ewogCQkgKiBpbiAwLjV1cyB1bml0cyBmb3IgV00xKy4KIAkJICovCiAJCS8qIHByaW1hcnkgKi8K LQkJdTE2IHByaV9sYXRlbmN5WzVdOworCQl1MTYgcHJpX2xhdGVuY3lbOF07CiAJCS8qIHNwcml0 ZSAqLwotCQl1MTYgc3ByX2xhdGVuY3lbNV07CisJCXUxNiBzcHJfbGF0ZW5jeVs4XTsKIAkJLyog Y3Vyc29yICovCi0JCXUxNiBjdXJfbGF0ZW5jeVs1XTsKKwkJdTE2IGN1cl9sYXRlbmN5WzhdOwog CQkvKgogCQkgKiBSYXcgd2F0ZXJtYXJrIG1lbW9yeSBsYXRlbmN5IHZhbHVlcwogCQkgKiBmb3Ig U0tMIGZvciBhbGwgOCBsZXZlbHMKLS0gCjIuMjkuMgoKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhA bGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxt YW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg== From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14A88C433EB for ; Mon, 22 Mar 2021 16:07:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0049E619B7 for ; Mon, 22 Mar 2021 16:07:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232002AbhCVQGo (ORCPT ); Mon, 22 Mar 2021 12:06:44 -0400 Received: from mail.kernel.org ([198.145.29.99]:53216 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230499AbhCVQFa (ORCPT ); Mon, 22 Mar 2021 12:05:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9E526619B3; Mon, 22 Mar 2021 16:05:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616429130; bh=Cz6Ib/Jy2MCBRG3RkrW7YxIgzj/6kEv+v4DuuyruVdM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YmX1KQkIWDTM9oL9SIaizhQuXBgId2TgjaOHRvpRa8ujB1Hj1aOwCgrCrMNJVi2gq P8VgokfOwAmfnYZLX1rsRk4pLvkeDX2bspNuX1VYi25/JXoxXtnn7F2MgFWC0FsAFu N+uQuJ3Me21QeU0KrCs4aFbaBIGeJwlctHwPj1pA51MBMY2ra+UvbFh+zl+P+BsSj9 1ElKemq6Wxa1TUdo/FGf/LywTMYZxZt3573Q+qI3GKdCXVd48krzSZHquQETNI++01 tCB8r6B7NO2iohCFFlGopnfYJGFYOD5rOpt+nJhCejnPW+cx72ztkTHm7tbHkrEoPf S1/KeKBMSo8Ag== From: Arnd Bergmann To: linux-kernel@vger.kernel.org, Martin Sebor , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter Cc: Arnd Bergmann , x86@kernel.org, Ning Sun , Kalle Valo , Simon Kelley , James Smart , "James E.J. Bottomley" , Anders Larsen , Tejun Heo , Serge Hallyn , Imre Deak , linux-arm-kernel@lists.infradead.org, tboot-devel@lists.sourceforge.net, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-scsi@vger.kernel.org, cgroups@vger.kernel.org, linux-security-module@vger.kernel.org, Chris Wilson , =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Matt Roper , Aditya Swarup Subject: [PATCH 10/11] drm/i915: avoid stringop-overread warning on pri_latency Date: Mon, 22 Mar 2021 17:02:48 +0100 Message-Id: <20210322160253.4032422-11-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210322160253.4032422-1-arnd@kernel.org> References: <20210322160253.4032422-1-arnd@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: From: Arnd Bergmann gcc-11 warns about what appears to be an out-of-range array access: In function ‘snb_wm_latency_quirk’, inlined from ‘ilk_setup_wm_latency’ at drivers/gpu/drm/i915/intel_pm.c:3108:3: drivers/gpu/drm/i915/intel_pm.c:3057:9: error: ‘intel_print_wm_latency’ reading 16 bytes from a region of size 10 [-Werror=stringop-overread] 3057 | intel_print_wm_latency(dev_priv, "Primary", dev_priv->wm.pri_latency); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/intel_pm.c: In function ‘ilk_setup_wm_latency’: drivers/gpu/drm/i915/intel_pm.c:3057:9: note: referencing argument 3 of type ‘const u16 *’ {aka ‘const short unsigned int *’} drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function ‘intel_print_wm_latency’ 2994 | static void intel_print_wm_latency(struct drm_i915_private *dev_priv, | ^~~~~~~~~~~~~~~~~~~~~~ My guess is that this code is actually safe because the size of the array depends on the hardware generation, and the function checks for that, but at the same time I would not expect the compiler to work it out correctly, and the code seems a little fragile with regards to future changes. Simply increasing the size of the array should help. Signed-off-by: Arnd Bergmann --- drivers/gpu/drm/i915/i915_drv.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 26d69d06aa6d..3567602e0a35 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1095,11 +1095,11 @@ struct drm_i915_private { * in 0.5us units for WM1+. */ /* primary */ - u16 pri_latency[5]; + u16 pri_latency[8]; /* sprite */ - u16 spr_latency[5]; + u16 spr_latency[8]; /* cursor */ - u16 cur_latency[5]; + u16 cur_latency[8]; /* * Raw watermark memory latency values * for SKL for all 8 levels -- 2.29.2 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8073EC433DB for ; Mon, 22 Mar 2021 16:08:36 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 29A07619B0 for ; Mon, 22 Mar 2021 16:08:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 29A07619B0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=WdChyarPfIBOr9kQ494deeRVe56NXwK1WlYdlsiP/6I=; b=RRFwUfZgssf93ZFO2yrFcVYuV ZLMyl//uHlzzleQ6ikb7wXm9L7Rdz1xyZ8jXYBy85J/SwJ1wM/1rmsq0xN7uq3Grb06jkBsxQb8A2 665qT7v3lMYVzDee/tVEZyLYdMrpTEcFZg1LjvyqZz+K9xbdsaBJW0YfPgYzxz4GlTx+9Zv10T0g4 KOCkN+b3qggxLuANEYG8OBtlc4D0tOpizPfaftPITYBfPLPwn60WG6hLzalqwaXjoGkPkGgUmNVyk basth10zg0D0eeQifftMiqQTXR/53vK0ogv+9BdWGTvX8a17RrihKcEcPu7V6Y/JF6qKU2sV374ID JczJI7lVw==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lON4w-00ByRW-16; Mon, 22 Mar 2021 16:06:55 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lON3b-00Bxtm-Jp; Mon, 22 Mar 2021 16:05:35 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9E526619B3; Mon, 22 Mar 2021 16:05:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616429130; bh=Cz6Ib/Jy2MCBRG3RkrW7YxIgzj/6kEv+v4DuuyruVdM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YmX1KQkIWDTM9oL9SIaizhQuXBgId2TgjaOHRvpRa8ujB1Hj1aOwCgrCrMNJVi2gq P8VgokfOwAmfnYZLX1rsRk4pLvkeDX2bspNuX1VYi25/JXoxXtnn7F2MgFWC0FsAFu N+uQuJ3Me21QeU0KrCs4aFbaBIGeJwlctHwPj1pA51MBMY2ra+UvbFh+zl+P+BsSj9 1ElKemq6Wxa1TUdo/FGf/LywTMYZxZt3573Q+qI3GKdCXVd48krzSZHquQETNI++01 tCB8r6B7NO2iohCFFlGopnfYJGFYOD5rOpt+nJhCejnPW+cx72ztkTHm7tbHkrEoPf S1/KeKBMSo8Ag== From: Arnd Bergmann To: linux-kernel@vger.kernel.org, Martin Sebor , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter Cc: Arnd Bergmann , x86@kernel.org, Ning Sun , Kalle Valo , Simon Kelley , James Smart , "James E.J. Bottomley" , Anders Larsen , Tejun Heo , Serge Hallyn , Imre Deak , linux-arm-kernel@lists.infradead.org, tboot-devel@lists.sourceforge.net, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-scsi@vger.kernel.org, cgroups@vger.kernel.org, linux-security-module@vger.kernel.org, Chris Wilson , =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Matt Roper , Aditya Swarup Subject: [PATCH 10/11] drm/i915: avoid stringop-overread warning on pri_latency Date: Mon, 22 Mar 2021 17:02:48 +0100 Message-Id: <20210322160253.4032422-11-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210322160253.4032422-1-arnd@kernel.org> References: <20210322160253.4032422-1-arnd@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210322_160533_568125_AE4B4A1C X-CRM114-Status: GOOD ( 14.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616429130; bh=Cz6Ib/Jy2MCBRG3RkrW7YxIgzj/6kEv+v4DuuyruVdM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YmX1KQkIWDTM9oL9SIaizhQuXBgId2TgjaOHRvpRa8ujB1Hj1aOwCgrCrMNJVi2gq P8VgokfOwAmfnYZLX1rsRk4pLvkeDX2bspNuX1VYi25/JXoxXtnn7F2MgFWC0FsAFu N+uQuJ3Me21QeU0KrCs4aFbaBIGeJwlctHwPj1pA51MBMY2ra+UvbFh+zl+P+BsSj9 1ElKemq6Wxa1TUdo/FGf/LywTMYZxZt3573Q+qI3GKdCXVd48krzSZHquQETNI++01 tCB8r6B7NO2iohCFFlGopnfYJGFYOD5rOpt+nJhCejnPW+cx72ztkTHm7tbHkrEoPf S1/KeKBMSo8Ag== From: Arnd Bergmann To: linux-kernel@vger.kernel.org, Martin Sebor , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter Subject: [PATCH 10/11] drm/i915: avoid stringop-overread warning on pri_latency Date: Mon, 22 Mar 2021 17:02:48 +0100 Message-Id: <20210322160253.4032422-11-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210322160253.4032422-1-arnd@kernel.org> References: <20210322160253.4032422-1-arnd@kernel.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dri-devel@lists.freedesktop.org, Chris Wilson , linux-scsi@vger.kernel.org, x86@kernel.org, James Smart , tboot-devel@lists.sourceforge.net, Kalle Valo , ath11k@lists.infradead.org, Serge Hallyn , Arnd Bergmann , "James E.J. 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