ssb: extif: add check for max value before setting watchdog register
Prevent the watchdog register on the extif core to be set to a too
high value.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/ssb/driver_extif.c b/drivers/ssb/driver_extif.c
index dc47f30..0aa4c2a 100644
--- a/drivers/ssb/driver_extif.c
+++ b/drivers/ssb/driver_extif.c
@@ -112,9 +112,10 @@
*m = extif_read32(extif, SSB_EXTIF_CLOCK_SB);
}
-void ssb_extif_watchdog_timer_set(struct ssb_extif *extif,
- u32 ticks)
+void ssb_extif_watchdog_timer_set(struct ssb_extif *extif, u32 ticks)
{
+ if (ticks > SSB_EXTIF_WATCHDOG_MAX_TIMER)
+ ticks = SSB_EXTIF_WATCHDOG_MAX_TIMER;
extif_write32(extif, SSB_EXTIF_WATCHDOG, ticks);
}
diff --git a/include/linux/ssb/ssb_driver_extif.h b/include/linux/ssb/ssb_driver_extif.h
index 2604efa..b618188 100644
--- a/include/linux/ssb/ssb_driver_extif.h
+++ b/include/linux/ssb/ssb_driver_extif.h
@@ -152,6 +152,7 @@
/* watchdog */
#define SSB_EXTIF_WATCHDOG_CLK 48000000 /* Hz */
+#define SSB_EXTIF_WATCHDOG_MAX_TIMER ((1 << 28) - 1)
#ifdef CONFIG_SSB_DRIVER_EXTIF