drm/radeon/kms: properly set accel working flag and bailout when false

If accel is not working many subsystem such as the ib pool might not be
initialized properly that can lead to segfault inside kernel when cs
ioctl is call with non working acceleration. To avoid this make sure
the accel working flag is false when an error in GPU startup happen and
return EBUSY from cs ioctl if accel is not working.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

13 files changed, 64 insertions, 8 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 9be353b894c..f58254a3fb0 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -3223,6 +3223,7 @@ int evergreen_resume(struct radeon_device *rdev)
         r = evergreen_startup(rdev);
         if (r) {
                 DRM_ERROR("evergreen startup failed on resume\n");
+                rdev->accel_working = false;
                 return r;
         }
 
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index db09065e68f..2509c505acb 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -1547,6 +1547,7 @@ int cayman_resume(struct radeon_device *rdev)
         r = cayman_startup(rdev);
         if (r) {
                 DRM_ERROR("cayman startup failed on resume\n");
+                rdev->accel_working = false;
                 return r;
         }
         return r;
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 18cd84fae99..333cde9d4e7 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -3928,6 +3928,8 @@ static int r100_startup(struct radeon_device *rdev)
 
 int r100_resume(struct radeon_device *rdev)
 {
+        int r;
+
         /* Make sur GART are not working */
         if (rdev->flags & RADEON_IS_PCI)
                 r100_pci_gart_disable(rdev);
@@ -3947,7 +3949,11 @@ int r100_resume(struct radeon_device *rdev)
         radeon_surface_init(rdev);
 
         rdev->accel_working = true;
-        return r100_startup(rdev);
+        r = r100_startup(rdev);
+        if (r) {
+                rdev->accel_working = false;
+        }
+        return r;
 }
 
 int r100_suspend(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index 3fc0d29a5f3..6829638cca4 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -1431,6 +1431,8 @@ static int r300_startup(struct radeon_device *rdev)
 
 int r300_resume(struct radeon_device *rdev)
 {
+        int r;
+
         /* Make sur GART are not working */
         if (rdev->flags & RADEON_IS_PCIE)
                 rv370_pcie_gart_disable(rdev);
@@ -1452,7 +1454,11 @@ int r300_resume(struct radeon_device *rdev)
         radeon_surface_init(rdev);
 
         rdev->accel_working = true;
-        return r300_startup(rdev);
+        r = r300_startup(rdev);
+        if (r) {
+                rdev->accel_working = false;
+        }
+        return r;
 }
 
 int r300_suspend(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/r420.c b/drivers/gpu/drm/radeon/r420.c
index 666e28fe509..b14323053ba 100644
--- a/drivers/gpu/drm/radeon/r420.c
+++ b/drivers/gpu/drm/radeon/r420.c
@@ -291,6 +291,8 @@ static int r420_startup(struct radeon_device *rdev)
 
 int r420_resume(struct radeon_device *rdev)
 {
+        int r;
+
         /* Make sur GART are not working */
         if (rdev->flags & RADEON_IS_PCIE)
                 rv370_pcie_gart_disable(rdev);
@@ -316,7 +318,11 @@ int r420_resume(struct radeon_device *rdev)
         radeon_surface_init(rdev);
 
         rdev->accel_working = true;
-        return r420_startup(rdev);
+        r = r420_startup(rdev);
+        if (r) {
+                rdev->accel_working = false;
+        }
+        return r;
 }
 
 int r420_suspend(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/r520.c b/drivers/gpu/drm/radeon/r520.c
index 4ae1615e752..25084e824db 100644
--- a/drivers/gpu/drm/radeon/r520.c
+++ b/drivers/gpu/drm/radeon/r520.c
@@ -218,6 +218,8 @@ static int r520_startup(struct radeon_device *rdev)
 
 int r520_resume(struct radeon_device *rdev)
 {
+        int r;
+
         /* Make sur GART are not working */
         if (rdev->flags & RADEON_IS_PCIE)
                 rv370_pcie_gart_disable(rdev);
@@ -237,7 +239,11 @@ int r520_resume(struct radeon_device *rdev)
         radeon_surface_init(rdev);
 
         rdev->accel_working = true;
-        return r520_startup(rdev);
+        r = r520_startup(rdev);
+        if (r) {
+                rdev->accel_working = false;
+        }
+        return r;
 }
 
 int r520_init(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 4f08e5e6ee9..fbcd84803b6 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2529,6 +2529,7 @@ int r600_resume(struct radeon_device *rdev)
         r = r600_startup(rdev);
         if (r) {
                 DRM_ERROR("r600 startup failed on resume\n");
+                rdev->accel_working = false;
                 return r;
         }
 
diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index 435a3d970ab..e64bec488ed 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -453,6 +453,10 @@ int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
         int r;
 
         radeon_mutex_lock(&rdev->cs_mutex);
+        if (!rdev->accel_working) {
+                radeon_mutex_unlock(&rdev->cs_mutex);
+                return -EBUSY;
+        }
         /* initialize parser */
         memset(&parser, 0, sizeof(struct radeon_cs_parser));
         parser.filp = filp;
diff --git a/drivers/gpu/drm/radeon/rs400.c b/drivers/gpu/drm/radeon/rs400.c
index b0ce84a20a6..866a05be75f 100644
--- a/drivers/gpu/drm/radeon/rs400.c
+++ b/drivers/gpu/drm/radeon/rs400.c
@@ -442,6 +442,8 @@ static int rs400_startup(struct radeon_device *rdev)
 
 int rs400_resume(struct radeon_device *rdev)
 {
+        int r;
+
         /* Make sur GART are not working */
         rs400_gart_disable(rdev);
         /* Resume clock before doing reset */
@@ -462,7 +464,11 @@ int rs400_resume(struct radeon_device *rdev)
         radeon_surface_init(rdev);
 
         rdev->accel_working = true;
-        return rs400_startup(rdev);
+        r = rs400_startup(rdev);
+        if (r) {
+                rdev->accel_working = false;
+        }
+        return r;
 }
 
 int rs400_suspend(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index c05865e5521..4fc700684dc 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -876,6 +876,8 @@ static int rs600_startup(struct radeon_device *rdev)
 
 int rs600_resume(struct radeon_device *rdev)
 {
+        int r;
+
         /* Make sur GART are not working */
         rs600_gart_disable(rdev);
         /* Resume clock before doing reset */
@@ -894,7 +896,11 @@ int rs600_resume(struct radeon_device *rdev)
         radeon_surface_init(rdev);
 
         rdev->accel_working = true;
-        return rs600_startup(rdev);
+        r = rs600_startup(rdev);
+        if (r) {
+                rdev->accel_working = false;
+        }
+        return r;
 }
 
 int rs600_suspend(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/rs690.c b/drivers/gpu/drm/radeon/rs690.c
index 4f24a0fa8c8..f68dff2fadc 100644
--- a/drivers/gpu/drm/radeon/rs690.c
+++ b/drivers/gpu/drm/radeon/rs690.c
@@ -659,6 +659,8 @@ static int rs690_startup(struct radeon_device *rdev)
 
 int rs690_resume(struct radeon_device *rdev)
 {
+        int r;
+
         /* Make sur GART are not working */
         rs400_gart_disable(rdev);
         /* Resume clock before doing reset */
@@ -677,7 +679,11 @@ int rs690_resume(struct radeon_device *rdev)
         radeon_surface_init(rdev);
 
         rdev->accel_working = true;
-        return rs690_startup(rdev);
+        r = rs690_startup(rdev);
+        if (r) {
+                rdev->accel_working = false;
+        }
+        return r;
 }
 
 int rs690_suspend(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c
index 880637fd194..959bf4483be 100644
--- a/drivers/gpu/drm/radeon/rv515.c
+++ b/drivers/gpu/drm/radeon/rv515.c
@@ -424,6 +424,8 @@ static int rv515_startup(struct radeon_device *rdev)
 
 int rv515_resume(struct radeon_device *rdev)
 {
+        int r;
+
         /* Make sur GART are not working */
         if (rdev->flags & RADEON_IS_PCIE)
                 rv370_pcie_gart_disable(rdev);
@@ -443,7 +445,11 @@ int rv515_resume(struct radeon_device *rdev)
         radeon_surface_init(rdev);
 
         rdev->accel_working = true;
-        return rv515_startup(rdev);
+        r =  rv515_startup(rdev);
+        if (r) {
+                rdev->accel_working = false;
+        }
+        return r;
 }
 
 int rv515_suspend(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index a1668b659dd..c049c0c5184 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -1139,6 +1139,7 @@ int rv770_resume(struct radeon_device *rdev)
         r = rv770_startup(rdev);
         if (r) {
                 DRM_ERROR("r600 startup failed on resume\n");
+                rdev->accel_working = false;
                 return r;
         }