serial: sh-sci: Use platform_get_irq_optional() for optional interrupts

As platform_get_irq() now prints an error when the interrupt does not
exist, scary warnings may be printed for optional interrupts:

    sh-sci e6550000.serial: IRQ index 1 not found
    sh-sci e6550000.serial: IRQ index 2 not found
    sh-sci e6550000.serial: IRQ index 3 not found
    sh-sci e6550000.serial: IRQ index 4 not found
    sh-sci e6550000.serial: IRQ index 5 not found

Fix this by calling platform_get_irq_optional() instead for all but the
first interrupts, which are optional.

Fixes: 7723f4c5ecdb8d83 ("driver core: platform: Add an error message to platform_get_irq*()")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20191001180743.1041-1-geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 4e754a4850e6db63e1693edb04113b2e72e44a0e..22e5d4e13714e8635a54b74ab6c5f02f2c05bb2a 100644 (file)
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2894,8 +2894,12 @@ static int sci_init_single(struct platform_device *dev,
        port->mapbase = res->start;
        sci_port->reg_size = resource_size(res);
 
-       for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i)
-               sci_port->irqs[i] = platform_get_irq(dev, i);
+       for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i) {
+               if (i)
+                       sci_port->irqs[i] = platform_get_irq_optional(dev, i);
+               else
+                       sci_port->irqs[i] = platform_get_irq(dev, i);
+       }
 
        /* The SCI generates several interrupts. They can be muxed together or
         * connected to different interrupt lines. In the muxed case only one