1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index 4f8ea4260572..d5255751e7b3 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -56,6 +56,7 @@ int rs600_mc_init(struct radeon_device *rdev)
         rdev->mc.vram_location = G_000004_MC_FB_START(tmp) << 16;
         rdev->mc.gtt_location = 0xffffffffUL;
         r = radeon_mc_setup(rdev);
+        rdev->mc.igp_sideport_enabled = radeon_atombios_sideport_present(rdev);
         if (r)
                 return r;
         return 0;
@@ -134,7 +135,8 @@ void rs600_hpd_init(struct radeon_device *rdev)
                         break;
                 }
         }
-        rs600_irq_set(rdev);
+        if (rdev->irq.installed)
+                rs600_irq_set(rdev);
 }
 
 void rs600_hpd_fini(struct radeon_device *rdev)
@@ -315,6 +317,11 @@ int rs600_irq_set(struct radeon_device *rdev)
         u32 hpd2 = RREG32(R_007D18_DC_HOT_PLUG_DETECT2_INT_CONTROL) &
                 ~S_007D18_DC_HOT_PLUG_DETECT2_INT_EN(1);
 
+        if (!rdev->irq.installed) {
+                WARN(1, "Can't enable IRQ/MSI because no handler is installed.\n");
+                WREG32(R_000040_GEN_INT_CNTL, 0);
+                return -EINVAL;
+        }
         if (rdev->irq.sw_int) {
                 tmp |= S_000040_SW_INT_EN(1);
         }
@@ -396,7 +403,7 @@ int rs600_irq_process(struct radeon_device *rdev)
         }
         while (status || r500_disp_int) {
                 /* SW interrupt */
-                if (G_000040_SW_INT_EN(status))
+                if (G_000044_SW_INT(status))
                         radeon_fence_process(rdev);
                 /* Vertical blank interrupts */
                 if (G_007EDC_LB_D1_VBLANK_INTERRUPT(r500_disp_int))
@@ -553,6 +560,7 @@ static int rs600_startup(struct radeon_device *rdev)
                 return r;
         /* Enable IRQ */
         rs600_irq_set(rdev);
+        rdev->config.r300.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL);
         /* 1M ring buffer */
         r = r100_cp_init(rdev, 1024 * 1024);
         if (r) {