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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 E4B2AC433DF for ; Mon, 17 Aug 2020 18:29:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C90E22053B for ; Mon, 17 Aug 2020 18:29:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597688992; bh=POih9G7UqkC5Ul1MYzi3N3eD1nRn5F7/aPLt0IzppNQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZamhvJbZcqrbbtDaTJCx8CTnz31ryu9SPf3Pvvb1MkuSLCTsB6GFums4tCAibiG91 9rScM1WMys9J7KOUjCb4kOmubsCrXrhl2ZnUAnqqlsdy563mKn56B0hekct6R4lFzG Ki/sXn1SMYKkC3Ar4q6S/LimwM2aDDChPRSPq0UM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391038AbgHQS3t (ORCPT ); Mon, 17 Aug 2020 14:29:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:49086 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388156AbgHQQBr (ORCPT ); Mon, 17 Aug 2020 12:01:47 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 628B320829; Mon, 17 Aug 2020 16:01:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597680098; bh=POih9G7UqkC5Ul1MYzi3N3eD1nRn5F7/aPLt0IzppNQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zogNlOEbEwmvDCwc6UTB3H1KB8GPlROBQapTJvzIhxnRS2FuBqnfjwFOP30OLXerW VO7VbIXEjqT1ASSBNUCR0DmzMzeKumWDATeDXET2nQTtr59uGuF9Pigi40RJg/xHVA 2HLUyHxdgGszG8maune5oQenFPFqp0YJ5iWjFeG0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jack Xiao , Alex Deucher , Hawking Zhang , =?UTF-8?q?Christian=20K=C3=B6nig?= , Sasha Levin Subject: [PATCH 5.4 051/270] drm/amdgpu: avoid dereferencing a NULL pointer Date: Mon, 17 Aug 2020 17:14:12 +0200 Message-Id: <20200817143758.319695268@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143755.807583758@linuxfoundation.org> References: <20200817143755.807583758@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jack Xiao [ Upstream commit 55611b507fd6453d26030c0c0619fdf0c262766d ] Check if irq_src is NULL to avoid dereferencing a NULL pointer, for MES ring is uneccessary to recieve an interrupt notification. Signed-off-by: Jack Xiao Acked-by: Alex Deucher Reviewed-by: Hawking Zhang Reviewed-by: Christian König Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index 23085b352cf2d..c212d5fc665c6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -404,7 +404,9 @@ int amdgpu_fence_driver_start_ring(struct amdgpu_ring *ring, ring->fence_drv.gpu_addr = adev->uvd.inst[ring->me].gpu_addr + index; } amdgpu_fence_write(ring, atomic_read(&ring->fence_drv.last_seq)); - amdgpu_irq_get(adev, irq_src, irq_type); + + if (irq_src) + amdgpu_irq_get(adev, irq_src, irq_type); ring->fence_drv.irq_src = irq_src; ring->fence_drv.irq_type = irq_type; @@ -539,8 +541,9 @@ void amdgpu_fence_driver_fini(struct amdgpu_device *adev) /* no need to trigger GPU reset as we are unloading */ amdgpu_fence_driver_force_completion(ring); } - amdgpu_irq_put(adev, ring->fence_drv.irq_src, - ring->fence_drv.irq_type); + if (ring->fence_drv.irq_src) + amdgpu_irq_put(adev, ring->fence_drv.irq_src, + ring->fence_drv.irq_type); drm_sched_fini(&ring->sched); del_timer_sync(&ring->fence_drv.fallback_timer); for (j = 0; j <= ring->fence_drv.num_fences_mask; ++j) @@ -576,8 +579,9 @@ void amdgpu_fence_driver_suspend(struct amdgpu_device *adev) } /* disable the interrupt */ - amdgpu_irq_put(adev, ring->fence_drv.irq_src, - ring->fence_drv.irq_type); + if (ring->fence_drv.irq_src) + amdgpu_irq_put(adev, ring->fence_drv.irq_src, + ring->fence_drv.irq_type); } } @@ -603,8 +607,9 @@ void amdgpu_fence_driver_resume(struct amdgpu_device *adev) continue; /* enable the interrupt */ - amdgpu_irq_get(adev, ring->fence_drv.irq_src, - ring->fence_drv.irq_type); + if (ring->fence_drv.irq_src) + amdgpu_irq_get(adev, ring->fence_drv.irq_src, + ring->fence_drv.irq_type); } } -- 2.25.1