From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8EDF738DE9 for ; Wed, 11 Dec 2024 16:32:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733934732; cv=none; b=fmUExo5dv4xRAdfy3Sskvlk4HfaYz8aSDTCw0dFkcKxqF2NfIzad/50zXA54ZVN0kBt4Y3lLaaRNd0MZ2KCfTtKqRwtVKlFzBpBdnxleXn03vkEZeE+B+HGgemK4cldv91RTt+YEfyuVXAz37dmHPRDHnkbYX4yX23OyDtw7jQM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733934732; c=relaxed/simple; bh=n878rBrBZLvBZTB/F44w0OF0HJsM0/9ScVio040JnXk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oSYkQ6P+Pen0UbOKU2xu3s9xUJKWuVDT19+G0SYhLrpN3RQuf4OZKLb4/3rqrrIP4vPDFEU263Y6P7XHxJo7kd+WFA/F4pbjCH+qpKUS4hmMUwKYTHRwNfaz4Fgmhx86zw9UoxCeheAonsKL35qfdZYY1GUWFyULSnPIXrlGpN4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IU4Jkyga; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IU4Jkyga" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E549AC4CED2; Wed, 11 Dec 2024 16:32:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733934732; bh=n878rBrBZLvBZTB/F44w0OF0HJsM0/9ScVio040JnXk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IU4Jkyga6uj2YcarGG2sRXzsI5VZ8QDugJry1a2n9l46DBz5HGfgBbeptklg7/nx9 LKAMMpbDz2ohmCUQQCsTFUTh4+BOmsRj4/LD5sNyTQgNy+kFf9+QM+LLjpXzuKXW0I uemP4HUbffupdg+ertIH7SMPgJuSjhZFjgdM8bYUqc6w/wkba9lFV39m1VX1gA2tvv 6L9HMG4ruXErz2Om55fmJ/JA9evSdq6L+OXbXTApHd1y0+K0VjTQtT0fneaggmJlIe T0fT4oeewMwVXpnOyJz9MhTLMreM6N2jJbDebP98cxGcD7gZIKDH8uRELFw5wNhyrc EgpnBSsusfnjQ== From: Sasha Levin To: stable@vger.kernel.org Cc: jianqi.ren.cn@windriver.com, Sasha Levin Subject: Re: [PATCH 6.1.y] drm/amd/display: Don't refer to dc_sink in is_dsc_need_re_compute Date: Wed, 11 Dec 2024 11:32:10 -0500 Message-ID: <20241211104034-b941070268a7cc1f@stable.kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241211100119.2069620-1-jianqi.ren.cn@windriver.com> References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit [ Sasha's backport helper bot ] Hi, The upstream commit SHA1 provided is correct: fcf6a49d79923a234844b8efe830a61f3f0584e4 WARNING: Author mismatch between patch and upstream commit: Backport author: Commit author: Wayne Lin Status in newer kernel trees: 6.12.y | Present (exact SHA1) 6.6.y | Present (different SHA1: c7e65cab54a8) 6.1.y | Not found Note: The patch differs from the upstream commit: --- 1: fcf6a49d79923 ! 1: 047f6f4d94ae2 drm/amd/display: Don't refer to dc_sink in is_dsc_need_re_compute @@ Metadata ## Commit message ## drm/amd/display: Don't refer to dc_sink in is_dsc_need_re_compute + [ Upstream commit fcf6a49d79923a234844b8efe830a61f3f0584e4 ] + [Why] When unplug one of monitors connected after mst hub, encounter null pointer dereference. @@ Commit message Signed-off-by: Wayne Lin Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher + Signed-off-by: Jianqi Ren ## drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c ## @@ drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c: amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector) @@ drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c: dm_dp_mst_detect(st amdgpu_dm_set_mst_status(&aconnector->mst_status, MST_REMOTE_EDID | MST_ALLOCATE_NEW_PAYLOAD | MST_CLEAR_ALLOCATED_PAYLOAD, -@@ drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c: static bool is_dsc_need_re_compute( - if (!aconnector || !aconnector->dsc_aux) - continue; - -- /* -- * check if cached virtual MST DSC caps are available and DSC is supported -- * as per specifications in their Virtual DPCD registers. -- */ -- if (!(aconnector->dc_sink->dsc_caps.dsc_dec_caps.is_dsc_supported || -- aconnector->dc_link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_PASSTHROUGH_SUPPORT)) -- continue; -- - stream_on_link[new_stream_on_link_num] = aconnector; - new_stream_on_link_num++; - --- Results of testing on various branches: | Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.1.y | Success | Success |