From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-op-o11.zoho.com (sender4-op-o11.zoho.com [136.143.188.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 40E2E47D947 for ; Tue, 11 Aug 2026 21:43:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.11 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786484599; cv=pass; b=HF4GgVXNPMMmSUAYz5vvkujs45MW+MWN3ffpCnUHV5PcimMgFu63q8O1JITfbu0CQDlGUm9Invr/vLEub1MMlhUGqSs5NH2W3Mks2csjAqAJxUCzBrnAthOoW93CeJlFr3ADsNXiXXhnnbepml5+1IupqklQ8afoHp6Ifb4wE4Y= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786484599; c=relaxed/simple; bh=kl4fy4ui72Fh+RD+K3B6m4ExNC9Qrv3fOS3tpchSf74=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ICTeiM7j7h49BIl2S2vOSbwpBm8iOPrkHmJMlb6gw6X9uaTbTsK4S/MH3imLydl0uy+A7DTQM+uJd0Pwy5kVuzeC9Tg45xYXxK3p2p9k90+DfHylqk6a8mc0ksEukx7ffSA+9HsbqSL4VtRwnPjZULvroNSqQZ0MUk2l4xDDRuQ= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b=Pi6QukWN; arc=pass smtp.client-ip=136.143.188.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b="Pi6QukWN" ARC-Seal: i=1; a=rsa-sha256; t=1786484551; cv=none; d=zohomail.com; s=zohoarc; b=OGRjR0mKgOlJD35gXStSzB73enRnuhvzBIK3rTzPi+l5fwbvpurHQd2kX1mDroYTYfbf0I0AHPu8foHdtZQPxQWIZHHxX6ixS/sc6niEjzITrTqjBdhlYjEzqWVoOxUNDuRQHXrp5Bs9Po433UdUBF3vmCU3iD5WD+VpiRpWV4Y= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1786484551; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To; bh=czRVsGoDhUYjh47WNCfN5jXfKsBYe+ZKrefmwoTVP38=; b=EffMh7Pvm10N9EnVcZtGxZo5+6bMEBle/2MUMArSoQVsishIrsm1d0nX8wfUqswaO3TLn0w26Vg1/R2nlox7CtjJgoYFT5h1whmkpONAt9/0wcHJF1BP9CE9IUR9fclhlrwd+zFfkxpd0vBt39nkev5770+Vcl2MnuHGIIDQSW4= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=adrian.larumbe@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1786484551; s=zohomail; d=collabora.com; i=adrian.larumbe@collabora.com; h=From:From:Date:Date:Subject:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Message-Id:In-Reply-To:To:To:Cc:Cc:Reply-To; bh=czRVsGoDhUYjh47WNCfN5jXfKsBYe+ZKrefmwoTVP38=; b=Pi6QukWNikwNaQ2dQl2qzVbdETMXSNwykgG4BUOTOOc01AuYzDdliTaHFH2+6ogI Yac/lI5YbyuuAL4Ti60FVI9iZ3DFZlQcStFGodIFHzvOt/lFmj6t49LDpWxynOofwuY qB04tlZCA2SLHQ4WPybciIOauzBLibTsOXf8FP9A= Received: by mx.zohomail.com with SMTPS id 1786484549674128.65685693522425; Tue, 11 Aug 2026 14:42:29 -0700 (PDT) From: =?utf-8?q?Adri=C3=A1n_Larumbe?= Date: Tue, 11 Aug 2026 22:42:11 +0100 Subject: [PATCH v5 02/11] drm/panfrost: Prevent division by 0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20260811-claude-fixes-v5-2-3d692c9e98c2@collabora.com> References: <20260811-claude-fixes-v5-0-3d692c9e98c2@collabora.com> In-Reply-To: <20260811-claude-fixes-v5-0-3d692c9e98c2@collabora.com> To: Boris Brezillon , Rob Herring , Steven Price , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Faith Ekstrand , "Marty E. Plummer" , Tomeu Vizoso , Eric Anholt , Alyssa Rosenzweig , Robin Murphy , Philipp Zabel Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Collabora Kernel Team , =?utf-8?q?Adri=C3=A1n_Larumbe?= , Neil Armstrong , Claude X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1249; i=adrian.larumbe@collabora.com; h=from:subject:message-id; bh=kl4fy4ui72Fh+RD+K3B6m4ExNC9Qrv3fOS3tpchSf74=; b=owEB7QES/pANAwAKAQ4mfkzuU0M9AcsmYgBqe5czDhlrwpmjftleSK3KG4Wtw5rS5iDVls7Th GA7xwqEMlOJAbMEAAEKAB0WIQQyQDDowAUXXfk3B6QOJn5M7lNDPQUCanuXMwAKCRAOJn5M7lND PZCFDACiG0rgthHEXzxUU8F0SKf03NisGG292ffPvOFWoghY6bLFVdWlfnlWwU/QKt2kRX9ExdI q74oeLOJoSoTEYyQEWGHtghY4O8nJxOwNjlbqgbKi6ARq5ZMqNnI2ry1L45+8KEZbJ9hLba8NJB DOH6ard97nAr1Tb7VXzqnWUW0RlOLIjfr/vmqRiXFRXqFUcWCVYzq6SzFXWs7pf1XKwAYNgxW3e NHBKMoLaqPuAryyx+nDbPECUyDeA4JC7+cxIexv9tRM3HLVqxtLmCge4eFSEF3s51fhT+P8eI79 SwYN0cPXu54duPg0g9OD94NOhO4zryHW2cdcpHhsdsS0BYqdgX29V2xtxJoa5guGQ4SmN08Fup/ U9BnyNM/erHKMeQyCIHAnQNsO6PECCfpLykGi2Tjf64pig0Qcug5qPlP/UtePpV23hVYzRDfl5L LDcAcPmUm4DBQoyxabhYywCiwCq9A2oV8ue4r+WvH2Rj/lXmUPXC0DDUcXWZiSDWc3+zc= X-Developer-Key: i=adrian.larumbe@collabora.com; a=openpgp; fpr=324030E8C005175DF93707A40E267E4CEE53433D When updating and debug-printing devfreq stats, in the very unlikely off-chance that total device time is less than 100 ns, division by 0 would happen. Fix the divisor when relevant and rearrange operands. Reported-by: Claude Closes: https://gitlab.freedesktop.org/panfrost/linux/-/work_items/88 Fixes: f3ba91228e8e ("drm/panfrost: Add initial panfrost driver") Reviewed-by: Steven Price Signed-off-by: Adrián Larumbe --- drivers/gpu/drm/panfrost/panfrost_devfreq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index b51c30778811..0fe81d259274 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -78,7 +78,7 @@ static int panfrost_devfreq_get_dev_status(struct device *dev, dev_dbg(pfdev->base.dev, "busy %lu total %lu %lu %% freq %lu MHz\n", status->busy_time, status->total_time, - status->busy_time / (status->total_time / 100), + status->busy_time * 100 / MAX(status->total_time, 1), status->current_frequency / 1000 / 1000); return 0; -- 2.55.0