gpio: sifive: Fix SiFive gpio probe

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@vger.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Link: https://lore.kernel.org/r/20201107081420.60325-10-damien.lemoal@wdc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpio/gpio-sifive.c b/drivers/gpio/gpio-sifive.c
index c54dd08f2cbfd3c75d74ffec723f4e0e5f72e4f7..d5eb9ca119016c6ba7882334ee2eaf16ce77949a 100644 (file)
--- a/drivers/gpio/gpio-sifive.c
+++ b/drivers/gpio/gpio-sifive.c
@@ -183,7 +183,7 @@ static int sifive_gpio_probe(struct platform_device *pdev)
                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;