intel_th: Pick up irq number from resources

Platform devices pass their IRQs around as resources, so as a convenience
for the glue layer code, allow them pass the IRQ to the core driver in
the resources array.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c
index d295b221e0bc..8f820c182240 100644
--- a/drivers/hwtracing/intel_th/core.c
+++ b/drivers/hwtracing/intel_th/core.c
@@ -805,7 +805,14 @@ intel_th_alloc(struct device *dev, struct intel_th_drvdata *drvdata,
                struct resource *devres, unsigned int ndevres, int irq)
 {
         struct intel_th *th;
-        int err;
+        int err, r;
+
+        if (irq == -1)
+                for (r = 0; r < ndevres; r++)
+                        if (devres[r].flags & IORESOURCE_IRQ) {
+                                irq = devres[r].start;
+                                break;
+                        }
 
         th = kzalloc(sizeof(*th), GFP_KERNEL);
         if (!th)