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-rw-r--r--common/ioexpander.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/common/ioexpander.c b/common/ioexpander.c
index e130e77a8a..de64bafc7e 100644
--- a/common/ioexpander.c
+++ b/common/ioexpander.c
@@ -51,7 +51,7 @@ static int ioex_is_valid_interrupt_signal(enum ioex_signal signal)
const struct ioex_info *g = ioex_get_signal_info(signal);
/* Fail if no interrupt handler */
- if (signal >= ioex_ih_count)
+ if (signal - IOEX_SIGNAL_START >= ioex_ih_count)
return EC_ERROR_PARAM1;
drv = ioex_config[g->ioex].drv;