drm/amd/pm: fix smu i2c data read risk

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 <kevinyang.wang@amd.com> Reviewed-by: Lijo Lazar <lijo.lazar@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
mariux64 · Jul 12, 2023 · d934e53 · d934e53
1 parent 6725f33
commit d934e53
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Showing 6 changed files with 6 additions and 6 deletions.
diff --git 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_adapter *i2c_adap,
 	}
 	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_adapter *i2c_adap,
 	}
 	r = num_msgs;
 fail:
+	mutex_unlock(&adev->pm.mutex);
 	kfree(req);
 	return r;
 }

diff --git 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_adapter *i2c_adap,
 	}
 	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_adapter *i2c_adap,
 	}
 	r = num_msgs;
 fail:
+	mutex_unlock(&adev->pm.mutex);
 	kfree(req);
 	return r;
 }

diff --git 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(struct i2c_adapter *i2c_adap,
 	}
 	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(struct i2c_adapter *i2c_adap,
 	}
 	r = num_msgs;
 fail:
+	mutex_unlock(&adev->pm.mutex);
 	kfree(req);
 	return r;
 }

diff --git 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_adapter *i2c_adap,
 	}
 	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_adapter *i2c_adap,
 	}
 	r = num_msgs;
 fail:
+	mutex_unlock(&adev->pm.mutex);
 	kfree(req);
 	return r;
 }

diff --git 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
@@ -2320,7 +2320,6 @@ static int smu_v13_0_0_i2c_xfer(struct i2c_adapter *i2c_adap,
 	}
 	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;
 
@@ -2337,6 +2336,7 @@ static int smu_v13_0_0_i2c_xfer(struct i2c_adapter *i2c_adap,
 	}
 	r = num_msgs;
 fail:
+	mutex_unlock(&adev->pm.mutex);
 	kfree(req);
 	return r;
 }

diff --git 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
@@ -1763,7 +1763,6 @@ static int smu_v13_0_6_i2c_xfer(struct i2c_adapter *i2c_adap,
 	}
 	mutex_lock(&adev->pm.mutex);
 	r = smu_v13_0_6_request_i2c_xfer(smu, req);
-	mutex_unlock(&adev->pm.mutex);
 	if (r)
 		goto fail;
 
@@ -1780,6 +1779,7 @@ static int smu_v13_0_6_i2c_xfer(struct i2c_adapter *i2c_adap,
 	}
 	r = num_msgs;
 fail:
+	mutex_unlock(&adev->pm.mutex);
 	kfree(req);
 	return r;
 }