drm/radeon/kms: Don't try to enable IRQ if we have no handler installed

If for any reason we haven't installed handler we shouldn't try to
enable IRQ/MSI on the hw so we don't get unhandled IRQ/MSI which
makes the kernel sad.

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

4 files changed, 28 insertions, 5 deletions

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index d2b789e67c39..8760d66e058a 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -131,7 +131,8 @@ void r100_hpd_init(struct radeon_device *rdev)
                         break;
                 }
         }
-        r100_irq_set(rdev);
+        if (rdev->irq.installed)
+                r100_irq_set(rdev);
 }
 
 void r100_hpd_fini(struct radeon_device *rdev)
@@ -243,6 +244,11 @@ int r100_irq_set(struct radeon_device *rdev)
 {
         uint32_t tmp = 0;
 
+        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 |= RADEON_SW_INT_ENABLE;
         }
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 0c065f425c84..1f4f83d6fbe6 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -285,7 +285,8 @@ void r600_hpd_init(struct radeon_device *rdev)
                         }
                 }
         }
-        r600_irq_set(rdev);
+        if (rdev->irq.installed)
+                r600_irq_set(rdev);
 }
 
 void r600_hpd_fini(struct radeon_device *rdev)
@@ -2461,6 +2462,10 @@ int r600_irq_set(struct radeon_device *rdev)
         u32 mode_int = 0;
         u32 hpd1, hpd2, hpd3, hpd4 = 0, hpd5 = 0, hpd6 = 0;
 
+        if (!rdev->irq.installed) {
+                WARN(1, "Can't enable IRQ/MSI because no handler is installed.\n");
+                return -EINVAL;
+        }
         /* don't enable anything if the ih is disabled */
         if (!rdev->ih.enabled)
                 return 0;
diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index 9223296fe37b..3cfd60fd0083 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -97,6 +97,7 @@ void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
         rdev->irq.sw_int = false;
         for (i = 0; i < 2; i++) {
                 rdev->irq.crtc_vblank_int[i] = false;
+                rdev->irq.hpd[i] = false;
         }
         radeon_irq_set(rdev);
 }
@@ -128,17 +129,22 @@ int radeon_irq_kms_init(struct radeon_device *rdev)
                         DRM_INFO("radeon: using MSI.\n");
                 }
         }
-        drm_irq_install(rdev->ddev);
         rdev->irq.installed = true;
+        r = drm_irq_install(rdev->ddev);
+        if (r) {
+                rdev->irq.installed = false;
+                return r;
+        }
         DRM_INFO("radeon: irq initialized.\n");
         return 0;
 }
 
 void radeon_irq_kms_fini(struct radeon_device *rdev)
 {
+        drm_vblank_cleanup(rdev->ddev);
         if (rdev->irq.installed) {
-                rdev->irq.installed = false;
                 drm_irq_uninstall(rdev->ddev);
+                rdev->irq.installed = false;
                 if (rdev->msi_enabled)
                         pci_disable_msi(rdev->pdev);
         }
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index a0378c57e4ec..d5255751e7b3 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -135,7 +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)
@@ -316,6 +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);
         }