serial: 8250_bcm7271: use NULL to initialized a null pointer

Pointer membase is currently being in initialized with zero rather
than NULL. Fix this.

Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210719095533.14017-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c
index 725a450..7f656fa 100644 (file)
--- a/drivers/tty/serial/8250/8250_bcm7271.c
+++ b/drivers/tty/serial/8250/8250_bcm7271.c
@@ -941,7 +941,7 @@ static int brcmuart_probe(struct platform_device *pdev)
        struct clk *baud_mux_clk;
        struct uart_8250_port up;
        struct resource *irq;
-       void __iomem *membase = 0;
+       void __iomem *membase = NULL;
        resource_size_t mapbase = 0;
        u32 clk_rate = 0;
        int ret;