From 7d4fa100b0cc069b2d788e1d9fe086e9e057958e Mon Sep 17 00:00:00 2001 From: Daniel Kurtz Date: Thu, 28 Jun 2012 21:08:19 +0800 Subject: [PATCH] Input: atmel_mxt_ts - refactor when and how object table is freed The Object Table is freed in three cases: 1) When the driver is being removed. 2) In the error path of mxt_initialize(). 3) Just after a firmware update, when a new object table is about to be read. For cases 2 & 3, the driver is not immediately unloaded, so this patch refactors these cases to use a common cleanup function. It also refactors the mxt_initialize error paths to ensure that this cleanup happens. Note: mxt_update_fw_store() does not handle errors during mxt_initialize(). A proposed fix for this is in a subsequent patchset. Signed-off-by: Daniel Kurtz Signed-off-by: Henrik Rydberg --- drivers/input/touchscreen/atmel_mxt_ts.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index d6b64a0f..488e3e8 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -750,6 +750,12 @@ static int mxt_get_object_table(struct mxt_data *data) return 0; } +static void mxt_free_object_table(struct mxt_data *data) +{ + kfree(data->object_table); + data->object_table = NULL; +} + static int mxt_initialize(struct mxt_data *data) { struct i2c_client *client = data->client; @@ -772,12 +778,12 @@ static int mxt_initialize(struct mxt_data *data) /* Get object table information */ error = mxt_get_object_table(data); if (error) - return error; + goto err_free_object_table; /* Check register init values */ error = mxt_check_reg_init(data); if (error) - return error; + goto err_free_object_table; mxt_handle_pdata(data); @@ -795,12 +801,12 @@ static int mxt_initialize(struct mxt_data *data) /* Update matrix size at info struct */ error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val); if (error) - return error; + goto err_free_object_table; info->matrix_xsize = val; error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val); if (error) - return error; + goto err_free_object_table; info->matrix_ysize = val; dev_info(&client->dev, @@ -814,6 +820,10 @@ static int mxt_initialize(struct mxt_data *data) info->object_num); return 0; + +err_free_object_table: + mxt_free_object_table(data); + return error; } static void mxt_calc_resolution(struct mxt_data *data) @@ -1000,8 +1010,7 @@ static ssize_t mxt_update_fw_store(struct device *dev, /* Wait for reset */ msleep(MXT_FWRESET_TIME); - kfree(data->object_table); - data->object_table = NULL; + mxt_free_object_table(data); mxt_initialize(data); } @@ -1128,7 +1137,7 @@ static int __devinit mxt_probe(struct i2c_client *client, error = mxt_initialize(data); if (error) - goto err_free_object; + goto err_free_mem; error = request_threaded_irq(client->irq, NULL, mxt_interrupt, pdata->irqflags, client->name, data); -- 2.7.4