[Linux-stm32] [PATCH] i2c: stm32f7: prevent array underflow in stm32f7_get_lower_rate()

[Dan Carpenter]

We want to break with "i" set to zero whether we find the rate we want
or not.  In the current code, if we don't find the rate we want then it
exits the loop with "i" set to -1 and results in an array underflow.

Fixes: 09cc9a3bce91 ("i2c: stm32f7: allows for any bus frequency")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
 drivers/i2c/busses/i2c-stm32f7.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 9c9e10ea91991..bff3479fe122a 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -607,7 +607,7 @@ static u32 stm32f7_get_lower_rate(u32 rate)
 {
 	int i = ARRAY_SIZE(stm32f7_i2c_specs);
 
-	while (i--)
+	while (--i)
 		if (stm32f7_i2c_specs[i].rate < rate)
 			break;
 
-- 
2.26.2