Re: [PATCH v2 1/2] [PATCH v2 1/2] staging: greybus: fw-management: Add detailed mutex comment

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Apr 28, 2025 at 09:38:36PM +0530, Sridhar Arra wrote:
> Added a detailed comment explaining the role of the mutex
> in serializing firmware management ioctl() operations.
> The mutex prevents concurrent access to firmware operations
> and protects the 'disabled' state flag during disconnection.
> 
> Signed-off-by: Sridhar Arra <sridhar.arra@yahoo.com>
> ---
>  drivers/staging/greybus/fw-management.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/staging/greybus/fw-management.c b/drivers/staging/greybus/fw-management.c
> index a47385175582..56725b711a17 100644
> --- a/drivers/staging/greybus/fw-management.c
> +++ b/drivers/staging/greybus/fw-management.c
> @@ -28,6 +28,19 @@ struct fw_mgmt {
>  
>  	/* Common id-map for interface and backend firmware requests */
>  	struct ida		id_map;
> +	/*
> +	 * Mutex to serialize firmware management ioctl() operations and
> +	 * protect against concurrent access.
> +	 *
> +	 * Ensures that user-space cannot perform multiple firmware
> +	 * operations in parallel (e.g., updating interface firmware)
> +	 * for the same Interface, avoiding race conditions and reducing
> +	 * code complexity.
> +	 *
> +	 * Also protects the 'disabled' state flag, preventing new
> +	 * operations from starting when the firmware management
> +	 * connection is being disconnected.
> +	 */
>  	struct mutex		mutex;
>  	struct completion	completion;
>  	struct cdev		cdev;
> -- 
> 2.43.0
> 
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
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- This looks like a new version of a previously submitted patch, but you
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  Please read the section entitled "The canonical patch format" in the
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  needs to be done here to properly describe this.

If you wish to discuss this problem further, or you have questions about
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