[PATCH] pinctrl: sh-pfc: Do not use platform_get_irq() to count interrupts

[Geert Uytterhoeven]

As platform_get_irq() now prints an error when the interrupt does not
exist, counting interrupts by looping until failure causes the printing
of scary messages like:

    sh-pfc e6060000.pin-controller: IRQ index 0 not found

Fix this by using the platform_irq_count() helper instead.

Fixes: 7723f4c5ecdb8d83 ("driver core: platform: Add an error message to 
platform_get_irq*()")
Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be>
---
This is a fix for v5.4-rc1.
---
 drivers/pinctrl/sh-pfc/core.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c
index b8640ad41bef26be..ce983247c9e28bfe 100644
--- a/drivers/pinctrl/sh-pfc/core.c
+++ b/drivers/pinctrl/sh-pfc/core.c
@@ -29,12 +29,12 @@
 static int sh_pfc_map_resources(struct sh_pfc *pfc,
                                struct platform_device *pdev)
 {
-       unsigned int num_windows, num_irqs;
        struct sh_pfc_window *windows;
        unsigned int *irqs = NULL;
+       unsigned int num_windows;
        struct resource *res;
        unsigned int i;
-       int irq;
+       int num_irqs;
 
        /* Count the MEM and IRQ resources. */
        for (num_windows = 0;; num_windows++) {
@@ -42,17 +42,13 @@ static int sh_pfc_map_resources(struct sh_pfc *pfc,
                if (!res)
                        break;
        }
-       for (num_irqs = 0;; num_irqs++) {
-               irq = platform_get_irq(pdev, num_irqs);
-               if (irq == -EPROBE_DEFER)
-                       return irq;
-               if (irq < 0)
-                       break;
-       }
-
        if (num_windows == 0)
                return -EINVAL;
 
+       num_irqs = platform_irq_count(pdev);
+       if (num_irqs < 0)
+               return num_irqs;
+
        /* Allocate memory windows and IRQs arrays. */
        windows = devm_kcalloc(pfc->dev, num_windows, sizeof(*windows),
                               GFP_KERNEL);
-- 
2.17.1