Hi, Linus,
On 06/28/2018 04:07 PM, Linus Walleij wrote:
> Report errors once when they happen on the I2C bus so we
> get good information in cases such as when the wrong I2C
> address is used.
>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> ---
> ChangeLog v1->v2:
> - Strip some comments that are now obvious from the context
> with the error messages.
> - Do not print the excess ECC error message, atmel_ecc_status()
> already prints error messages.
> ---
> drivers/crypto/atmel-ecc.c | 24 ++++++++++++++++--------
> 1 file changed, 16 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/crypto/atmel-ecc.c b/drivers/crypto/atmel-ecc.c
> index 33773920e4bf..baef0d07164d 100644
> --- a/drivers/crypto/atmel-ecc.c
> +++ b/drivers/crypto/atmel-ecc.c
> @@ -310,26 +310,31 @@ static int atmel_ecc_send_receive(struct i2c_client *client,
> mutex_lock(&i2c_priv->lock);
>
> ret = atmel_ecc_wakeup(client);
> - if (ret)
> + if (ret) {
> + dev_err(&client->dev, "wakeup failed\n");
> goto err;
> + }
>
> - /* send the command */
> ret = i2c_master_send(client, (u8 *)cmd, cmd->count + WORD_ADDR_SIZE);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_err(&client->dev, "command send failed\n");
> goto err;
> + }
>
> /* delay the appropriate amount of time for command to execute */
> msleep(cmd->msecs);
>
> - /* receive the response */
> ret = i2c_master_recv(client, cmd->data, cmd->rxsize);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_err(&client->dev, "getting response failed\n");
> goto err;
> + }
>
> - /* put the device into low-power mode */
> ret = atmel_ecc_sleep(client);
> - if (ret < 0)
> + if (ret < 0) {
> + dev_err(&client->dev, "putting to sleep failed\n");
> goto err;
> + }
>
> mutex_unlock(&i2c_priv->lock);
> return atmel_ecc_status(&client->dev, cmd->data);
> @@ -624,8 +629,11 @@ static int device_sanity_check(struct i2c_client *client)
> atmel_ecc_init_read_cmd(cmd);
>
> ret = atmel_ecc_send_receive(client, cmd);
> - if (ret)
> + if (ret) {
> + dev_err(&client->dev,
If you want to have two errors reported, one related to i2c and the other to
crypto, I propose to be consistent and add an error message for the other call
to atmel_ecc_send_receive() in atmel_ecdh_set_secret().
> + "failed to send ECC init command\n");
This line fits well in the previous. I would remove "ECC" from it, looks a bit
redundant:
atmel-ecc 2-0058: failed to send ECC init command
Thanks!
ta
> goto free_cmd;
> + }
>
> /*
> * It is vital that the Configuration, Data and OTP zones be locked
>
