netdev - Re: [PATCH v2] rtlwifi: fix incorrect error codes in rtl_debugfs_set_write

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Date:   Sun, 26 Mar 2023 10:08:56 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Wei Chen <harperchen1110@...il.com>
Cc:     pkshih@...ltek.com, kvalo@...nel.org, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] rtlwifi: fix incorrect error codes in
 rtl_debugfs_set_write_rfreg()

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@...il.com>

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