driver-core: platform: Catch errors from calls to irq_get_irq_data
irq_get_irq_data() can return NULL, which results in a nasty crash.
Check its return value before passing it on to irqd_set_trigger_type().
Signed-off-by: Guenter Roeck <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 44c9d4d..c4af003 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -108,9 +108,14 @@
* IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER*
* settings.
*/
- if (r && r->flags & IORESOURCE_BITS)
- irqd_set_trigger_type(irq_get_irq_data(r->start),
- r->flags & IORESOURCE_BITS);
+ if (r && r->flags & IORESOURCE_BITS) {
+ struct irq_data *irqd;
+
+ irqd = irq_get_irq_data(r->start);
+ if (!irqd)
+ return -ENXIO;
+ irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS);
+ }
return r ? r->start : -ENXIO;
#endif
