From: Dmitry Torokhov <[email protected]> I think having control flow with 2 goto/labels/flags is quite hard to read, this version is a bit more readable IMO.
Signed-off-by: Dmitry Torokhov <[email protected]> Signed-off-by: Nick Dyer <[email protected]> --- drivers/input/touchscreen/atmel_mxt_ts.c | 81 +++++++++++++++++--------------- 1 file changed, 42 insertions(+), 39 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index d50c614..a5f943d 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -359,7 +359,6 @@ static int mxt_bootloader_read(struct mxt_data *data, msg.buf = val; ret = i2c_transfer(data->client->adapter, &msg, 1); - if (ret == 1) { ret = 0; } else { @@ -414,6 +413,7 @@ static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry) case 0x5b: bootloader = appmode - 0x26; break; + default: dev_err(&data->client->dev, "Appmode i2c address 0x%02x not found\n", @@ -425,20 +425,20 @@ static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry) return 0; } -static int mxt_probe_bootloader(struct mxt_data *data, bool retry) +static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address) { struct device *dev = &data->client->dev; - int ret; + int error; u8 val; bool crc_failure; - ret = mxt_lookup_bootloader_address(data, retry); - if (ret) - return ret; + error = mxt_lookup_bootloader_address(data, alt_address); + if (error) + return error; - ret = mxt_bootloader_read(data, &val, 1); - if (ret) - return ret; + error = mxt_bootloader_read(data, &val, 1); + if (error) + return error; /* Check app crc fail mode */ crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL; @@ -1645,41 +1645,39 @@ static void mxt_config_cb(const struct firmware *cfg, void *ctx) static int mxt_initialize(struct mxt_data *data) { struct i2c_client *client = data->client; + int recovery_attempts = 0; int error; - bool alt_bootloader_addr = false; - bool retry = false; -retry_info: - error = mxt_get_info(data); - if (error) { -retry_bootloader: - error = mxt_probe_bootloader(data, alt_bootloader_addr); + while (1) { + error = mxt_get_info(data); + if (!error) + break; + + /* Check bootloader state */ + error = mxt_probe_bootloader(data, false); if (error) { - if (alt_bootloader_addr) { + dev_info(&client->dev, "Trying alternate bootloader address\n"); + error = mxt_probe_bootloader(data, true); + if (error) { /* Chip is not in appmode or bootloader mode */ return error; } + } - dev_info(&client->dev, "Trying alternate bootloader address\n"); - alt_bootloader_addr = true; - goto retry_bootloader; - } else { - if (retry) { - dev_err(&client->dev, "Could not recover from bootloader mode\n"); - /* - * We can reflash from this state, so do not - * abort init - */ - data->in_bootloader = true; - return 0; - } - - /* Attempt to exit bootloader into app mode */ - mxt_send_bootloader_cmd(data, false); - msleep(MXT_FW_RESET_TIME); - retry = true; - goto retry_info; + /* OK, we are in bootloader, see if we can recover */ + if (++recovery_attempts > 1) { + dev_err(&client->dev, "Could not recover from bootloader mode\n"); + /* + * We can reflash from this state, so do not + * abort initialization. + */ + data->in_bootloader = true; + return 0; } + + /* Attempt to exit bootloader into app mode */ + mxt_send_bootloader_cmd(data, false); + msleep(MXT_FW_RESET_TIME); } /* Get object table information */ @@ -1693,9 +1691,14 @@ retry_bootloader: if (error) goto err_free_object_table; - request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME, - &data->client->dev, GFP_KERNEL, data, - mxt_config_cb); + error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME, + &client->dev, GFP_KERNEL, data, + mxt_config_cb); + if (error) { + dev_err(&client->dev, "Failed to invoke firmware loader: %d\n", + error); + goto err_free_object_table; + } return 0; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
