[PATCH] drm: Support drivers with threaded irqs

[Sinclair Yeh]

From: Thomas Hellstrom <thellstrom at vmware.com>

See LWN article at
https://lwn.net/Articles/302043/

Signed-off-by: Thomas Hellstrom <thellstrom at vmware.com>
Reviewed-by: Deepak Singh Rawat <drawat at vmware.com>
Reviewed-by: Sinclair Yeh <syeh at vmware.com>
---
 drivers/gpu/drm/drm_irq.c | 6 ++++--
 include/drm/drm_drv.h     | 1 +
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 3b04c2510..ef9b4be 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -127,8 +127,10 @@ int drm_irq_install(struct drm_device *dev, int irq)
 	if (drm_core_check_feature(dev, DRIVER_IRQ_SHARED))
 		sh_flags = IRQF_SHARED;
 
-	ret = request_irq(irq, dev->driver->irq_handler,
-			  sh_flags, dev->driver->name, dev);
+	ret = request_threaded_irq(irq,
+				   dev->driver->irq_handler,
+				   dev->driver->irq_thread_fn,
+				   sh_flags, dev->driver->name, dev);
 
 	if (ret < 0) {
 		dev->irq_enabled = false;
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index 81971dc..c47abbf 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -333,6 +333,7 @@ struct drm_driver {
 	 * drivers which implement their own interrupt handling.
 	 */
 	irqreturn_t(*irq_handler) (int irq, void *arg);
+	irqreturn_t (*irq_thread_fn)(int irq, void *arg);
 
 	/**
 	 * @irq_preinstall:
-- 
2.7.4