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Date: Mon, 29 Apr 2024 00:49:35 +0000
From: Bard Liao <yung-chuan.liao@...ux.intel.com>
To: linux-sound@...r.kernel.org,
vkoul@...nel.org
Cc: vinod.koul@...aro.org,
linux-kernel@...r.kernel.org,
pierre-louis.bossart@...ux.intel.com,
bard.liao@...el.com
Subject: [PATCH] soundwire: fix usages of device_get_named_child_node()
From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
The documentation for device_get_named_child_node() mentions this
important point:
"
The caller is responsible for calling fwnode_handle_put() on the
returned fwnode pointer.
"
Add fwnode_handle_put() to avoid leaked references.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
drivers/soundwire/amd_manager.c | 3 +++
drivers/soundwire/intel_auxdevice.c | 6 +++++-
drivers/soundwire/mipi_disco.c | 30 +++++++++++++++++++++++------
3 files changed, 32 insertions(+), 7 deletions(-)
diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index 1066d87aa011..14bc624bc6b5 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -558,6 +558,9 @@ static int sdw_master_read_amd_prop(struct sdw_bus *bus)
amd_manager->wake_en_mask = wake_en_mask;
fwnode_property_read_u32(link, "amd-sdw-power-mode", &power_mode_mask);
amd_manager->power_mode_mask = power_mode_mask;
+
+ fwnode_handle_put(link);
+
return 0;
}
diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_auxdevice.c
index 17cf27e6ea73..18517121cc89 100644
--- a/drivers/soundwire/intel_auxdevice.c
+++ b/drivers/soundwire/intel_auxdevice.c
@@ -155,8 +155,10 @@ static int sdw_master_read_intel_prop(struct sdw_bus *bus)
SDW_MASTER_QUIRKS_CLEAR_INITIAL_PARITY;
intel_prop = devm_kzalloc(bus->dev, sizeof(*intel_prop), GFP_KERNEL);
- if (!intel_prop)
+ if (!intel_prop) {
+ fwnode_handle_put(link);
return -ENOMEM;
+ }
/* initialize with hardware defaults, in case the properties are not found */
intel_prop->doaise = 0x1;
@@ -184,6 +186,8 @@ static int sdw_master_read_intel_prop(struct sdw_bus *bus)
intel_prop->dodse,
intel_prop->dods);
+ fwnode_handle_put(link);
+
return 0;
}
diff --git a/drivers/soundwire/mipi_disco.c b/drivers/soundwire/mipi_disco.c
index 55a9c51c84c1..e5d9df26d4dc 100644
--- a/drivers/soundwire/mipi_disco.c
+++ b/drivers/soundwire/mipi_disco.c
@@ -66,8 +66,10 @@ int sdw_master_read_prop(struct sdw_bus *bus)
prop->clk_freq = devm_kcalloc(bus->dev, prop->num_clk_freq,
sizeof(*prop->clk_freq),
GFP_KERNEL);
- if (!prop->clk_freq)
+ if (!prop->clk_freq) {
+ fwnode_handle_put(link);
return -ENOMEM;
+ }
fwnode_property_read_u32_array(link,
"mipi-sdw-clock-frequencies-supported",
@@ -92,8 +94,10 @@ int sdw_master_read_prop(struct sdw_bus *bus)
prop->clk_gears = devm_kcalloc(bus->dev, prop->num_clk_gears,
sizeof(*prop->clk_gears),
GFP_KERNEL);
- if (!prop->clk_gears)
+ if (!prop->clk_gears) {
+ fwnode_handle_put(link);
return -ENOMEM;
+ }
fwnode_property_read_u32_array(link,
"mipi-sdw-supported-clock-gears",
@@ -116,6 +120,8 @@ int sdw_master_read_prop(struct sdw_bus *bus)
fwnode_property_read_u32(link, "mipi-sdw-command-error-threshold",
&prop->err_threshold);
+ fwnode_handle_put(link);
+
return 0;
}
EXPORT_SYMBOL(sdw_master_read_prop);
@@ -197,8 +203,10 @@ static int sdw_slave_read_dpn(struct sdw_slave *slave,
dpn[i].num_words,
sizeof(*dpn[i].words),
GFP_KERNEL);
- if (!dpn[i].words)
+ if (!dpn[i].words) {
+ fwnode_handle_put(node);
return -ENOMEM;
+ }
fwnode_property_read_u32_array(node,
"mipi-sdw-port-wordlength-configs",
@@ -236,8 +244,10 @@ static int sdw_slave_read_dpn(struct sdw_slave *slave,
dpn[i].num_channels,
sizeof(*dpn[i].channels),
GFP_KERNEL);
- if (!dpn[i].channels)
+ if (!dpn[i].channels) {
+ fwnode_handle_put(node);
return -ENOMEM;
+ }
fwnode_property_read_u32_array(node,
"mipi-sdw-channel-number-list",
@@ -251,8 +261,10 @@ static int sdw_slave_read_dpn(struct sdw_slave *slave,
dpn[i].num_ch_combinations,
sizeof(*dpn[i].ch_combinations),
GFP_KERNEL);
- if (!dpn[i].ch_combinations)
+ if (!dpn[i].ch_combinations) {
+ fwnode_handle_put(node);
return -ENOMEM;
+ }
fwnode_property_read_u32_array(node,
"mipi-sdw-channel-combination-list",
@@ -274,6 +286,8 @@ static int sdw_slave_read_dpn(struct sdw_slave *slave,
/* TODO: Read audio mode */
+ fwnode_handle_put(node);
+
i++;
}
@@ -348,10 +362,14 @@ int sdw_slave_read_prop(struct sdw_slave *slave)
prop->dp0_prop = devm_kzalloc(&slave->dev,
sizeof(*prop->dp0_prop),
GFP_KERNEL);
- if (!prop->dp0_prop)
+ if (!prop->dp0_prop) {
+ fwnode_handle_put(port);
return -ENOMEM;
+ }
sdw_slave_read_dp0(slave, port, prop->dp0_prop);
+
+ fwnode_handle_put(port);
}
/*
--
2.34.1
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