[PATCH 5.9 221/255] gpio: sifive: Fix SiFive gpio probe

[Greg Kroah-Hartman]

From: Damien Le Moal <damien.lemoal@xxxxxxx>

commit b72de3ff19fdc4bbe4d4bb3f4483c7e46e00bac3 upstream.

Fix the check on the number of IRQs to allow up to the maximum (32)
instead of only the maximum minus one.

Fixes: 96868dce644d ("gpio/sifive: Add GPIO driver for SiFive SoCs")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx>
Link: https://lore.kernel.org/r/20201107081420.60325-10-damien.lemoal@xxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpio/gpio-sifive.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpio/gpio-sifive.c
+++ b/drivers/gpio/gpio-sifive.c
@@ -183,7 +183,7 @@ static int sifive_gpio_probe(struct plat
 		return PTR_ERR(chip->regs);
 
 	ngpio = of_irq_count(node);
-	if (ngpio >= SIFIVE_GPIO_MAX) {
+	if (ngpio > SIFIVE_GPIO_MAX) {
 		dev_err(dev, "Too many GPIO interrupts (max=%d)\n",
 			SIFIVE_GPIO_MAX);
 		return -ENXIO;