3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <[email protected]>

commit 44517c44496062180a6376cc704b33129441ce60 upstream.

Interrupts only work with MSIs.
https://bugs.freedesktop.org/show_bug.cgi?id=37679

Reported-by: Dmitry Podgorny <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 drivers/gpu/drm/radeon/radeon_irq_kms.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -134,6 +134,12 @@ static bool radeon_msi_ok(struct radeon_
        /* Dell RS690 only seems to work with MSIs. */
        if ((rdev->pdev->device == 0x791f) &&
            (rdev->pdev->subsystem_vendor == 0x1028) &&
+           (rdev->pdev->subsystem_device == 0x01fc))
+               return true;
+
+       /* Dell RS690 only seems to work with MSIs. */
+       if ((rdev->pdev->device == 0x791f) &&
+           (rdev->pdev->subsystem_vendor == 0x1028) &&
            (rdev->pdev->subsystem_device == 0x01fd))
                return true;
 


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