Hi Nick,
Thanks for the patch.
On 20/2/19 22:58, Nick Crews wrote:
> Before, in debugfs.c it was possible to supply only the message type,
> and not supply any other arguments when sending raw commands. However,
> this is never used by the EC, and it led to an underflow error. Now,
> just don't allow too short of a command, we will never need
> that anyways.
>
> Fixes: 46c7fd06f8c9 ("platform/chrome: wilco_ec: Add support for raw commands in debugfs")
As this is -next material I'd like to squash the fix if you don't mind.
-- Enric
> Signed-off-by: Nick Crews <ncrews@xxxxxxxxxxxx>
> ---
> drivers/platform/chrome/wilco_ec/debugfs.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/platform/chrome/wilco_ec/debugfs.c b/drivers/platform/chrome/wilco_ec/debugfs.c
> index 46ff3b6c46c7..c090db2cd5be 100644
> --- a/drivers/platform/chrome/wilco_ec/debugfs.c
> +++ b/drivers/platform/chrome/wilco_ec/debugfs.c
> @@ -136,8 +136,8 @@ static ssize_t raw_write(struct file *file, const char __user *user_buf,
> ret = parse_hex_sentence(buf, kcount, request_data, TYPE_AND_DATA_SIZE);
> if (ret < 0)
> return ret;
> - /* Need at least two bytes for message type */
> - if (ret < 2)
> + /* Need at least two bytes for message type and one for command */
> + if (ret < 3)
> return -EINVAL;
>
> /* Clear response data buffer */
> @@ -145,7 +145,7 @@ static ssize_t raw_write(struct file *file, const char __user *user_buf,
>
> msg.type = request_data[0] << 8 | request_data[1];
> msg.flags = WILCO_EC_FLAG_RAW;
> - msg.command = ret > 2 ? request_data[2] : 0;
> + msg.command = request_data[2];
> msg.request_data = ret > 3 ? request_data + 3 : 0;
> msg.request_size = ret - 3;
> msg.response_data = debug_info->raw_data;
>
