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Diffstat (limited to 'linux/drm_ioctl.h')
-rw-r--r--linux/drm_ioctl.h17
1 files changed, 15 insertions, 2 deletions
diff --git a/linux/drm_ioctl.h b/linux/drm_ioctl.h
index 0d8a1259..945340c7 100644
--- a/linux/drm_ioctl.h
+++ b/linux/drm_ioctl.h
@@ -32,6 +32,7 @@
#define __NO_VERSION__
#include "drmP.h"
+
int DRM(irq_busid)(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
@@ -41,8 +42,20 @@ int DRM(irq_busid)(struct inode *inode, struct file *filp,
if (copy_from_user(&p, (drm_irq_busid_t *)arg, sizeof(p)))
return -EFAULT;
dev = pci_find_slot(p.busnum, PCI_DEVFN(p.devnum, p.funcnum));
- if (dev) p.irq = dev->irq;
- else p.irq = 0;
+ if (!dev) {
+ DRM_ERROR("pci_find_slot failed for %d:%d:%d\n",
+ p.busnum, p.devnum, p.funcnum);
+ p.irq = 0;
+ goto out;
+ }
+ if (!pci_enable_device(dev)) {
+ DRM_ERROR("pci_enable_device failed for %d:%d:%d\n",
+ p.busnum, p.devnum, p.funcnum);
+ p.irq = 0;
+ goto out;
+ }
+ p.irq = dev->irq;
+ out:
DRM_DEBUG("%d:%d:%d => IRQ %d\n",
p.busnum, p.devnum, p.funcnum, p.irq);
if (copy_to_user((drm_irq_busid_t *)arg, &p, sizeof(p)))