drm: fix irq naming for kms drivers.

allocating devname in the i915 driver was a hack originally and I
forgot to figure out how to do this properly back then.

So this is the cleaner version that just picks devname or driver name
in the irq code.

It removes the devname allocs from the i915 driver.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 93e677a481f5..fc8e5acd9d9a 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -196,6 +196,7 @@ int drm_irq_install(struct drm_device *dev)
 {
         int ret = 0;
         unsigned long sh_flags = 0;
+        char *irqname;
 
         if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
                 return -EINVAL;
@@ -227,8 +228,13 @@ int drm_irq_install(struct drm_device *dev)
         if (drm_core_check_feature(dev, DRIVER_IRQ_SHARED))
                 sh_flags = IRQF_SHARED;
 
+        if (dev->devname)
+                irqname = dev->devname;
+        else
+                irqname = dev->driver->name;
+
         ret = request_irq(drm_dev_to_irq(dev), dev->driver->irq_handler,
-                          sh_flags, dev->devname, dev);
+                          sh_flags, irqname, dev);
 
         if (ret < 0) {
                 mutex_lock(&dev->struct_mutex);