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 545FE1F942 for ; Fri, 21 Jul 2023 16:21:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CAC36C433C8; Fri, 21 Jul 2023 16:21:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689956490; bh=CmvkcYQglLiid8Jo3TWlBQLHoY53n2v2ywKXcWqJs4U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZfyNIr85+vdU4tsW0JJX5Epq+HvL60sfdjUV+1rHpDmAxmfgNYUPxgVFUg4c5FB2m /lujNvMWs+3vOoT/697HQ5tiZi84JoeemAT5fhdJQc3ldx4YV3cgOZ5gzaJbg0+67N 2rA5TMNmglreA+log3LdHKm3JQE2DrCspcRtl4P0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yang Wang , Lijo Lazar , Alex Deucher Subject: [PATCH 6.4 210/292] drm/amd/pm: fix smu i2c data read risk Date: Fri, 21 Jul 2023 18:05:19 +0200 Message-ID: <20230721160537.898987958@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721160528.800311148@linuxfoundation.org> References: <20230721160528.800311148@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Yang Wang commit d934e537c14bfe1227ced6341472571f354383e8 upstream. the smu driver_table is used for all types of smu tables data transcation (e.g: PPtable, Metrics, i2c, Ecc..). it is necessary to hold this lock to avoiding data tampering during the i2c read operation. Signed-off-by: Yang Wang Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c | 2 +- drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c | 2 +- drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c | 2 +- drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c | 2 +- drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c | 2 +- drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c | 2 +- 6 files changed, 6 insertions(+), 6 deletions(-) --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c @@ -2113,7 +2113,6 @@ static int arcturus_i2c_xfer(struct i2c_ } mutex_lock(&adev->pm.mutex); r = smu_cmn_update_table(smu, SMU_TABLE_I2C_COMMANDS, 0, req, true); - mutex_unlock(&adev->pm.mutex); if (r) goto fail; @@ -2130,6 +2129,7 @@ static int arcturus_i2c_xfer(struct i2c_ } r = num_msgs; fail: + mutex_unlock(&adev->pm.mutex); kfree(req); return r; } --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c @@ -3021,7 +3021,6 @@ static int navi10_i2c_xfer(struct i2c_ad } mutex_lock(&adev->pm.mutex); r = smu_cmn_update_table(smu, SMU_TABLE_I2C_COMMANDS, 0, req, true); - mutex_unlock(&adev->pm.mutex); if (r) goto fail; @@ -3038,6 +3037,7 @@ static int navi10_i2c_xfer(struct i2c_ad } r = num_msgs; fail: + mutex_unlock(&adev->pm.mutex); kfree(req); return r; } --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c @@ -3842,7 +3842,6 @@ static int sienna_cichlid_i2c_xfer(struc } mutex_lock(&adev->pm.mutex); r = smu_cmn_update_table(smu, SMU_TABLE_I2C_COMMANDS, 0, req, true); - mutex_unlock(&adev->pm.mutex); if (r) goto fail; @@ -3859,6 +3858,7 @@ static int sienna_cichlid_i2c_xfer(struc } r = num_msgs; fail: + mutex_unlock(&adev->pm.mutex); kfree(req); return r; } --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c @@ -1525,7 +1525,6 @@ static int aldebaran_i2c_xfer(struct i2c } mutex_lock(&adev->pm.mutex); r = smu_cmn_update_table(smu, SMU_TABLE_I2C_COMMANDS, 0, req, true); - mutex_unlock(&adev->pm.mutex); if (r) goto fail; @@ -1542,6 +1541,7 @@ static int aldebaran_i2c_xfer(struct i2c } r = num_msgs; fail: + mutex_unlock(&adev->pm.mutex); kfree(req); return r; } --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c @@ -1838,7 +1838,6 @@ static int smu_v13_0_0_i2c_xfer(struct i } mutex_lock(&adev->pm.mutex); r = smu_cmn_update_table(smu, SMU_TABLE_I2C_COMMANDS, 0, req, true); - mutex_unlock(&adev->pm.mutex); if (r) goto fail; @@ -1855,6 +1854,7 @@ static int smu_v13_0_0_i2c_xfer(struct i } r = num_msgs; fail: + mutex_unlock(&adev->pm.mutex); kfree(req); return r; } --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c @@ -1639,7 +1639,6 @@ static int smu_v13_0_6_i2c_xfer(struct i } mutex_lock(&adev->pm.mutex); r = smu_v13_0_6_request_i2c_xfer(smu, req); - mutex_unlock(&adev->pm.mutex); if (r) goto fail; @@ -1656,6 +1655,7 @@ static int smu_v13_0_6_i2c_xfer(struct i } r = num_msgs; fail: + mutex_unlock(&adev->pm.mutex); kfree(req); return r; }