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drm/i915: Add debug info for failed MSI enabling 

While not being able to enable MSI interrupts may be a normal
circumstance, for debugging it may still be a useful information, so
emit an info about this.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: David Weinehall <david.weinehall@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1454071949-24677-3-git-send-email-imre.deak@intel.com
This commit is contained in:
Imre Deak 2016-01-29 14:52:28 +02:00
parent 9c06f6744d
commit b074eae12f
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/i915/i915_dma.c
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@ -1109,8 +1109,10 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
* be lost or delayed, but we use them anyways to avoid
* stuck interrupts on some machines.
*/
if (!IS_I945G(dev) && !IS_I945GM(dev))
pci_enable_msi(dev->pdev);
if (!IS_I945G(dev) && !IS_I945GM(dev)) {
if (pci_enable_msi(dev->pdev) < 0)
DRM_DEBUG_DRIVER("can't enable MSI");
}
intel_device_info_runtime_init(dev);