mailbox: stm32-ipcc: check invalid irq

On failure of_irq_get() returns a negative value or zero, which is
not handled as an error in the existing implementation.
Instead of using this API, use platform_get_irq() that returns
exclusively a negative value on failure.
Also, do not output an error log in case of defer probe error.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

diff --git a/drivers/mailbox/stm32-ipcc.c b/drivers/mailbox/stm32-ipcc.c
index 210fe50..f91dfb1 100644 (file)
--- a/drivers/mailbox/stm32-ipcc.c
+++ b/drivers/mailbox/stm32-ipcc.c
@@ -8,9 +8,9 @@
 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/interrupt.h>
+#include <linux/io.h>
 #include <linux/mailbox_controller.h>
 #include <linux/module.h>
-#include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/pm_wakeirq.h>
 
@@ -240,9 +240,11 @@ static int stm32_ipcc_probe(struct platform_device *pdev)
 
        /* irq */
        for (i = 0; i < IPCC_IRQ_NUM; i++) {
-               ipcc->irqs[i] = of_irq_get_byname(dev->of_node, irq_name[i]);
+               ipcc->irqs[i] = platform_get_irq_byname(pdev, irq_name[i]);
                if (ipcc->irqs[i] < 0) {
-                       dev_err(dev, "no IRQ specified %s\n", irq_name[i]);
+                       if (ipcc->irqs[i] != -EPROBE_DEFER)
+                               dev_err(dev, "no IRQ specified %s\n",
+                                       irq_name[i]);
                        ret = ipcc->irqs[i];
                        goto err_clk;
                }
@@ -263,9 +265,10 @@ static int stm32_ipcc_probe(struct platform_device *pdev)
 
        /* wakeup */
        if (of_property_read_bool(np, "wakeup-source")) {
-               ipcc->wkp = of_irq_get_byname(dev->of_node, "wakeup");
+               ipcc->wkp = platform_get_irq_byname(pdev, "wakeup");
                if (ipcc->wkp < 0) {
-                       dev_err(dev, "could not get wakeup IRQ\n");
+                       if (ipcc->wkp != -EPROBE_DEFER)
+                               dev_err(dev, "could not get wakeup IRQ\n");
                        ret = ipcc->wkp;
                        goto err_clk;
                }