mei: clean pending read with vtag on bus

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@intel.com>
Reviewed-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230125082637.118970-4-alan.previn.teres.alexis@intel.com

diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 9ddb854..5c19097 100644 (file)
--- 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;
                }