regmap: irq: dispose all virtual irq before removing domain

It is require to dispose all virtual irq of hwirq on chip
created on given irq domain before removing this irq domain.
Hence dispose all mapped irqs before deleting the irq domains
in regmap_del_irq_chip();

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 9b0d202414d065bf6e03a6f39bb33c9925dee4db..7e1e9e86c70b9833ead6d6aea499ee8b0282bc40 100644 (file)
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -655,13 +655,34 @@ EXPORT_SYMBOL_GPL(regmap_add_irq_chip);
  *
  * @irq: Primary IRQ for the device
  * @d:   regmap_irq_chip_data allocated by regmap_add_irq_chip()
+ *
+ * This function also dispose all mapped irq on chip.
  */
 void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *d)
 {
+       unsigned int virq;
+       int hwirq;
+
        if (!d)
                return;
 
        free_irq(irq, d);
+
+       /* Dispose all virtual irq from irq domain before removing it */
+       for (hwirq = 0; hwirq < d->chip->num_irqs; hwirq++) {
+               /* Ignore hwirq if holes in the IRQ list */
+               if (!d->chip->irqs[hwirq].mask)
+                       continue;
+
+               /*
+                * Find the virtual irq of hwirq on chip and if it is
+                * there then dispose it
+                */
+               virq = irq_find_mapping(d->domain, hwirq);
+               if (virq)
+                       irq_dispose_mapping(virq);
+       }
+
        irq_domain_remove(d->domain);
        kfree(d->type_buf);
        kfree(d->type_buf_def);