pinctrl: fix loop in k210_pinconf_get_drive()

commit ba2ab85951c91a140a8fa51d8347d54e59ec009d upstream.

The loop exited too early so the k210_pinconf_drive_strength[0] array
element was never used.

Fixes: d4c34d09ab03 ("pinctrl: Add RISC-V Canaan Kendryte K210 FPIOA driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Link: https://lore.kernel.org/r/20220209180804.GA18385@kili
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/pinctrl/pinctrl-k210.c b/drivers/pinctrl/pinctrl-k210.c
index 49e3268..e3d03f2 100644 (file)
--- a/drivers/pinctrl/pinctrl-k210.c
+++ b/drivers/pinctrl/pinctrl-k210.c
@@ -482,7 +482,7 @@ static int k210_pinconf_get_drive(unsigned int max_strength_ua)
 {
        int i;
 
-       for (i = K210_PC_DRIVE_MAX; i; i--) {
+       for (i = K210_PC_DRIVE_MAX; i >= 0; i--) {
                if (k210_pinconf_drive_strength[i] <= max_strength_ua)
                        return i;
        }