Re: [PATCH 01/11] Input: synaptics-rmi4 - do not kfree() managed memory in F01

From: Christopher Heiny
Date: Thu Feb 13 2014 - 14:11:45 EST


On 02/12/2014 09:27 PM, Dmitry Torokhov wrote:
Data that is allocated with devm_kzalloc() should not be freed with
kfree(). In fact, we should rely on the fact that memory is managed and let
devres core free it for us.

Reported-by: Courtney Cavin <courtney.cavin@xxxxxxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>

Signed-off-by: Christopher Heiny <cheiny@xxxxxxxxxxxxx>

---
drivers/input/rmi4/rmi_f01.c | 23 +++++++++--------------
1 file changed, 9 insertions(+), 14 deletions(-)

diff --git a/drivers/input/rmi4/rmi_f01.c b/drivers/input/rmi4/rmi_f01.c
index 381ad60..92b90d1 100644
--- a/drivers/input/rmi4/rmi_f01.c
+++ b/drivers/input/rmi4/rmi_f01.c
@@ -272,7 +272,7 @@ static int rmi_f01_initialize(struct rmi_function *fn)
if (error < 0) {
dev_err(&fn->dev,
"Failed to read F01 control interrupt enable register.\n");
- goto error_exit;
+ return error;
}

ctrl_base_addr += data->num_of_irq_regs;
@@ -307,14 +307,14 @@ static int rmi_f01_initialize(struct rmi_function *fn)
data->device_control.doze_interval);
if (error < 0) {
dev_err(&fn->dev, "Failed to configure F01 doze interval register.\n");
- goto error_exit;
+ return error;
}
} else {
error = rmi_read(rmi_dev, data->doze_interval_addr,
&data->device_control.doze_interval);
if (error < 0) {
dev_err(&fn->dev, "Failed to read F01 doze interval register.\n");
- goto error_exit;
+ return error;
}
}

@@ -328,14 +328,14 @@ static int rmi_f01_initialize(struct rmi_function *fn)
data->device_control.wakeup_threshold);
if (error < 0) {
dev_err(&fn->dev, "Failed to configure F01 wakeup threshold register.\n");
- goto error_exit;
+ return error;
}
} else {
error = rmi_read(rmi_dev, data->wakeup_threshold_addr,
&data->device_control.wakeup_threshold);
if (error < 0) {
dev_err(&fn->dev, "Failed to read F01 wakeup threshold register.\n");
- goto error_exit;
+ return error;
}
}
}
@@ -351,14 +351,14 @@ static int rmi_f01_initialize(struct rmi_function *fn)
data->device_control.doze_holdoff);
if (error < 0) {
dev_err(&fn->dev, "Failed to configure F01 doze holdoff register.\n");
- goto error_exit;
+ return error;
}
} else {
error = rmi_read(rmi_dev, data->doze_holdoff_addr,
&data->device_control.doze_holdoff);
if (error < 0) {
dev_err(&fn->dev, "Failed to read F01 doze holdoff register.\n");
- goto error_exit;
+ return error;
}
}
}
@@ -367,22 +367,17 @@ static int rmi_f01_initialize(struct rmi_function *fn)
&data->device_status, sizeof(data->device_status));
if (error < 0) {
dev_err(&fn->dev, "Failed to read device status.\n");
- goto error_exit;
+ return error;
}

if (RMI_F01_STATUS_UNCONFIGURED(data->device_status)) {
dev_err(&fn->dev,
"Device was reset during configuration process, status: %#02x!\n",
RMI_F01_STATUS_CODE(data->device_status));
- error = -EINVAL;
- goto error_exit;
+ return -EINVAL;
}

return 0;
-
- error_exit:
- kfree(data);
- return error;
}

static int rmi_f01_config(struct rmi_function *fn)



--

Christopher Heiny
Senior Staff Firmware Engineer
Synaptics Incorporated
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