[PATCH v7 3/6] mei: clean pending read with vtag on bus

[Greg Kroah-Hartman]

On Wed, Jan 25, 2023 at 12:26:34AM -0800, Alan Previn wrote:
> From: Alexander Usyskin <alexander.usyskin at intel.com>
> 
> Client on bus have only one vtag map slot and should disregard the vtag
> value when cleaning pending read flag.
> Fixes read flow control message unexpectedly generated when
> clent on bus send messages with different vtags.
> 
> Signed-off-by: Alexander Usyskin <alexander.usyskin at intel.com>
> Reviewed-by: Tomas Winkler <tomas.winkler at intel.com>
> Signed-off-by: Alan Previn <alan.previn.teres.alexis at intel.com>
> ---
>  drivers/misc/mei/client.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
> index 9ddb854b8155..5c19097266fe 100644
> --- a/drivers/misc/mei/client.c
> +++ b/drivers/misc/mei/client.c
> @@ -1343,7 +1343,9 @@ static void mei_cl_reset_read_by_vtag(const struct mei_cl *cl, u8 vtag)
>  	struct mei_cl_vtag *vtag_l;
>  
>  	list_for_each_entry(vtag_l, &cl->vtag_map, list) {
> -		if (vtag_l->vtag == vtag) {
> +		/* The client on bus has one fixed vtag map */
> +		if ((cl->cldev && mei_cldev_enabled(cl->cldev)) ||
> +		    vtag_l->vtag == vtag) {
>  			vtag_l->pending_read = false;
>  			break;
>  		}
> -- 
> 2.39.0
> 

Acked-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>