From nobody Fri Dec 19 19:15:33 2025 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 E6CB114600D; Wed, 13 Mar 2024 16:43:08 +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=1710348189; cv=none; b=T4zub0F0Uu7TJ0NCfhrFvaMoFSm1B3fIjHnCv1USeOs4xjcXAJpRJtwiVt1oU+su8PgmZbVYHLkH+E2yA5WScUfPZoihnz0qk1skzmxjP7tVogq0fz5b/VqB3JeVjekFSBzYSR3tSr5UCHcxjwU8bXlLZWKr5d9EM7R96t6Sn1Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710348189; c=relaxed/simple; bh=MmP7YXHxW0FUCck29DRUrd4GsX2NbUzPP9VMeEKAEII=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XrPN0Ce+IIfs9G9fpzAOvNUfVdM9zKdKEDZzjjOJbHMTFsTH9Eom0BxQcIidobvsZ/d5UhkDLHgB5+bkGgLFti/6vTvwI1OktGFEeOeO8ZYqKr51qHflsohn0Cp6f5s309/SBjmzsFMKQEHQ/gVOeDSeMFtAtkmufMpzbl5hTWU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LAYePT2F; 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="LAYePT2F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73421C433C7; Wed, 13 Mar 2024 16:43:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710348188; bh=MmP7YXHxW0FUCck29DRUrd4GsX2NbUzPP9VMeEKAEII=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LAYePT2Fd37oNGIJDTX+YeRWFYv8j1W4QFdpN283FbtiWEWzU3D59kmVOyP+5+KN2 xVvkuSSD+aH1NEhK3j6pHKCx8nAEieUaNoVaSKjBUxl8PptmFCkiDpIQZd0PnVwQRT NU56wtkvOlDW6b4YgB7shSmu/DleiSQe8grCnw5UKyrVT6tr7alAcfkRXUZeQ33s0O pmTsKQF0UuG61AMUwQLkBPzif1RCIA1ua2+fIxOd6Zq8TJNc7umZuj10i1Ute0o0wF hbIOSSVBI39Sq9FSDeLEg9IxWwfdR105gYKkbL7t5q+u2WjJsyKCZ780LX9gUUrqtC 3BJNkJdVwtIrg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Srinivasan Shanmugam , Jerry Zuo , Jun Lei , Wayne Lin , Aurabindo Pillai , Rodrigo Siqueira , Hamza Mahfooz , Alex Deucher , Sasha Levin Subject: [PATCH 5.15 39/76] drm/amd/display: Fix uninitialized variable usage in core_link_ 'read_dpcd() & write_dpcd()' functions Date: Wed, 13 Mar 2024 12:41:46 -0400 Message-ID: <20240313164223.615640-40-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240313164223.615640-1-sashal@kernel.org> References: <20240313164223.615640-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.15.152-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-5.15.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 5.15.152-rc1 X-KernelTest-Deadline: 2024-03-15T16:42+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Srinivasan Shanmugam [ Upstream commit a58371d632ebab9ea63f10893a6b6731196b6f8d ] The 'status' variable in 'core_link_read_dpcd()' & 'core_link_write_dpcd()' was uninitialized. Thus, initializing 'status' variable to 'DC_ERROR_UNEXPECTED' by default. Fixes the below: drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dpcd.c:226 cor= e_link_read_dpcd() error: uninitialized symbol 'status'. drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dpcd.c:248 cor= e_link_write_dpcd() error: uninitialized symbol 'status'. Cc: stable@vger.kernel.org Cc: Jerry Zuo Cc: Jun Lei Cc: Wayne Lin Cc: Aurabindo Pillai Cc: Rodrigo Siqueira Cc: Hamza Mahfooz Signed-off-by: Srinivasan Shanmugam Reviewed-by: Rodrigo Siqueira Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c b/drivers/g= pu/drm/amd/display/dc/core/dc_link_dpcd.c index 72970e49800a6..3978cd5ea08a7 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c @@ -199,7 +199,7 @@ enum dc_status core_link_read_dpcd( uint32_t extended_size; /* size of the remaining partitioned address space */ uint32_t size_left_to_read; - enum dc_status status; + enum dc_status status =3D DC_ERROR_UNEXPECTED; /* size of the next partition to be read from */ uint32_t partition_size; uint32_t data_index =3D 0; @@ -228,7 +228,7 @@ enum dc_status core_link_write_dpcd( { uint32_t partition_size; uint32_t data_index =3D 0; - enum dc_status status; + enum dc_status status =3D DC_ERROR_UNEXPECTED; =20 while (size) { partition_size =3D dpcd_get_next_partition_size(address, size); --=20 2.43.0