Re: [PATCH v2] rtlwifi: fix incorrect error codes in rtl_debugfs_set_write_rfreg()

[Simon Horman]

On Sun, Mar 26, 2023 at 05:31:38AM +0000, Wei Chen wrote:
> If there is a failure during copy_from_user or user-provided data buffer
> is invalid, rtl_debugfs_set_write_rfreg should return negative error code
> instead of a positive value count.
> 
> Fix this bug by returning correct error code. Moreover, the check of buffer
> against null is removed since it will be handled by copy_from_user.
> 
> Fixes: 610247f46feb ("rtlwifi: Improve debugging by using debugfs")
> Signed-off-by: Wei Chen <harperchen1110@xxxxxxxxx>

Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx>