From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (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 EA0AC7D417 for ; Thu, 3 Oct 2024 07:19:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727939986; cv=none; b=dePY4GVevvbCWaDLwkAFddVduDRNiVanNOiEMPuDzYTjZnc5Iqy8W2whmzb5jhrCdCl+HJmK+cs9Jo4Fd1fAfVohNnYuMl8m8WtTHcbGVQq49HeOlXCX5nLkfNcoGQWvZBVCUw+gwK5eXhjU8AZYX12OplaaOqPjX6eNE4rvXGU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727939986; c=relaxed/simple; bh=fVrQjiIXiyJfjUITmJLGNtW5drmI/FLWZ17s/X1WhbQ=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=jAq7Dfn3qPhBcspn+8vPwIAoWyUhbuqGrFGsNqfhrC8rQafDH2Jc4ssF1UJ6kWFmJv/aTBTz60IomgcYqYZC1emPVCl9MDvqHwju/MmljqI7yOFKHCYB9hm4xCKaABwpmmYOIlUn5zm3WVUK7o7BNv1uWkFQ1UPmEQ4VOg6QBQ8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=pgzOY+Ej; arc=none smtp.client-ip=148.251.105.195 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 (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="pgzOY+Ej" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1727939983; bh=fVrQjiIXiyJfjUITmJLGNtW5drmI/FLWZ17s/X1WhbQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=pgzOY+EjkbMrN9rKcllO8chvnaU/9aZmgngD9av8iXyK7yltXc628NLRQYo3fQ20W C8N3FsoUHctc5cOp1QbGoQmIplOAaPGmJZXzs1eIsNrjVEYQfLePJZEILaqJi+aEsD 2MuI3D0pAo8wXoX36VCAWNh0oZy+SPkpM3SCwZxszeUmZHSGM1ES5ZPz1gWbgiUNED xCR2Sj7eyPpWV9ppZ9edKI9KYIl0Vm69vkhbCGefNsC4rCI8TlniJCdbcajw1kDOvL DwD5Cs++bcYrJBWUXa5Hdw66phU6YazVuEcJvYDAKG5vTmnVryUppU7CIBIsa/pzoI dPQueOYy2fKlA== Received: from localhost (unknown [IPv6:2a01:e0a:2c:6930:5cf4:84a1:2763:fe0d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bbrezillon) by bali.collaboradmins.com (Postfix) with ESMTPSA id D0F6B17E0FE0; Thu, 3 Oct 2024 09:19:42 +0200 (CEST) Date: Thu, 3 Oct 2024 09:19:36 +0200 From: Boris Brezillon To: =?UTF-8?B?QWRyacOhbg==?= Larumbe Cc: Rob Herring , Steven Price , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , AngeloGioacchino Del Regno , kernel@collabora.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] drm/panfrost: Add missing OPP table refcnt decremental Message-ID: <20241003091936.0b7d6f15@collabora.com> In-Reply-To: <20241003002603.3177741-1-adrian.larumbe@collabora.com> References: <20241003002603.3177741-1-adrian.larumbe@collabora.com> Organization: Collabora X-Mailer: Claws Mail 4.3.0 (GTK 3.24.43; x86_64-redhat-linux-gnu) 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: quoted-printable On Thu, 3 Oct 2024 01:25:37 +0100 Adri=C3=A1n Larumbe wrote: > Commit f11b0417eec2 ("drm/panfrost: Add fdinfo support GPU load metrics") > retrieves the OPP for the maximum device clock frequency, but forgets to > keep the reference count balanced by putting the returned OPP object. This > eventually leads to an OPP core warning when removing the device. BTW, we do have opp leaks in the error paths of panthor_devfreq_init() too. >=20 > Fix it by putting OPP objects as many times as they're retrieved. > Also remove an unnecessary whitespace. >=20 > Signed-off-by: Adri=C3=A1n Larumbe > Fixes: f11b0417eec2 ("drm/panfrost: Add fdinfo support GPU load metrics") > --- > drivers/gpu/drm/panfrost/panfrost_devfreq.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) >=20 > diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/dr= m/panfrost/panfrost_devfreq.c > index 2d30da38c2c3..c7d3f980f1e5 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c > +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c > @@ -38,7 +38,7 @@ static int panfrost_devfreq_target(struct device *dev, = unsigned long *freq, > return PTR_ERR(opp); > dev_pm_opp_put(opp); > =20 > - err =3D dev_pm_opp_set_rate(dev, *freq); > + err =3D dev_pm_opp_set_rate(dev, *freq); > if (!err) > ptdev->pfdevfreq.current_frequency =3D *freq; > =20 > @@ -177,6 +177,8 @@ int panfrost_devfreq_init(struct panfrost_device *pfd= ev) > */ > pfdevfreq->current_frequency =3D cur_freq; > =20 > + dev_pm_opp_put(opp); > + > /* > * Set the recommend OPP this will enable and configure the regulator > * if any and will avoid a switch off by regulator_late_cleanup()