From nobody Tue Sep 9 22:09:59 2025 Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [46.235.227.194]) (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 935343B2BD for ; Fri, 5 Jan 2024 18:47:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine 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="koD1jTYA" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1704480446; bh=Xy26gJL0rfEIAQ3GTzMQ9EaB0QSmN8Rrgbq8+tRhsXg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=koD1jTYASaaq0lH30DCRGwRlLF4icZe6o4RtGhMtxdBXY6SQHCj+AAoMWGtCV5jal 3o38uo19aKWom4br+OTJmNgxqtAXnvCQUYJjZ8hDcNButj0PQLLHni40YT501PCe6q ErF+M+MYMwDfZlVE+2dFDViPRVojFs1vXPkPZ8WiG92SaZ7MSFVtT17Scs7uYMdJsy HZalfvQSfjP9e4W+qiuVHBQZioyrxkCXK6FpqhTSHYXKdRKIxj01ioqjERVM7ygUfQ hQGNr+u92vLMktYspBAr0AJKm4va1ejnViBWlDzvwRtDU+HLnQGiP3yS7a15I0yQuP J7987sqBJRbVw== Received: from workpc.. (cola.collaboradmins.com [195.201.22.229]) (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: dmitry.osipenko) by madrid.collaboradmins.com (Postfix) with ESMTPSA id E4CC2378206D; Fri, 5 Jan 2024 18:47:24 +0000 (UTC) From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?UTF-8?q?Christian=20K=C3=B6nig?= , Qiang Yu , Steven Price , Boris Brezillon , Emma Anholt , Melissa Wen Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel@collabora.com, virtualization@lists.linux-foundation.org Subject: [PATCH v19 26/30] drm/shmem-helper: Turn warnings about imported GEM into errors Date: Fri, 5 Jan 2024 21:46:20 +0300 Message-ID: <20240105184624.508603-27-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240105184624.508603-1-dmitry.osipenko@collabora.com> References: <20240105184624.508603-1-dmitry.osipenko@collabora.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Turn sanity warnings about DRM-SHMEM API misuse into a error conditions for cases where imported GEM is used when it shouldn't be used. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_g= em_shmem_helper.c index 0d95d723b90d..7d2fe12bd793 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -409,7 +409,8 @@ int drm_gem_shmem_pin(struct drm_gem_shmem_object *shme= m) struct drm_gem_object *obj =3D &shmem->base; int ret; =20 - drm_WARN_ON(obj->dev, obj->import_attach); + if (drm_WARN_ON(obj->dev, obj->import_attach)) + return -EINVAL; =20 if (refcount_inc_not_zero(&shmem->pages_pin_count)) return 0; @@ -872,7 +873,8 @@ struct sg_table *drm_gem_shmem_get_sg_table(struct drm_= gem_shmem_object *shmem) { struct drm_gem_object *obj =3D &shmem->base; =20 - drm_WARN_ON(obj->dev, obj->import_attach); + if (drm_WARN_ON(obj->dev, obj->import_attach)) + return ERR_PTR(-EINVAL); =20 if (drm_WARN_ON(obj->dev, !shmem->pages)) return ERR_PTR(-ENOMEM); @@ -909,7 +911,8 @@ struct sg_table *drm_gem_shmem_get_pages_sgt_locked(str= uct drm_gem_shmem_object if (shmem->sgt) return shmem->sgt; =20 - drm_WARN_ON(obj->dev, obj->import_attach); + if (drm_WARN_ON(obj->dev, obj->import_attach)) + return ERR_PTR(-EINVAL); =20 sgt =3D drm_gem_shmem_get_sg_table(shmem); if (IS_ERR(sgt)) --=20 2.43.0