From: Malcolm Priestley <[email protected]>

commit ea81c3486442f4643fc9825a2bb1b430b829bccd upstream.

conf.listen_interval can sometimes be zero causing wake_up_count
to wrap around up to many beacons too late causing
CTRL-EVENT-BEACON-LOSS as in.

wpa_supplicant[795]: message repeated 45 times: [..CTRL-EVENT-BEACON-LOSS ]

Fixes: 43c93d9bf5e2 ("staging: vt6656: implement power saving code.")
Cc: stable <[email protected]>
Signed-off-by: Malcolm Priestley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 drivers/staging/vt6656/int.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/staging/vt6656/int.c
+++ b/drivers/staging/vt6656/int.c
@@ -145,7 +145,8 @@ void vnt_int_process_data(struct vnt_pri
                                priv->wake_up_count =
                                        priv->hw->conf.listen_interval;
 
-                       --priv->wake_up_count;
+                       if (priv->wake_up_count)
+                               --priv->wake_up_count;
 
                        /* Turn on wake up to listen next beacon */
                        if (priv->wake_up_count == 1)


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