Merge branch 'drm-armada-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into drm-next
These are the patches from Daniel Vetter, getting rid of struct_mutex
from the Armada DRM driver.
* 'drm-armada-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
drm/armada: use a private mutex to protect priv->linear
drm/armada: drop struct_mutex from cursor paths
drm/armada: don't grab dev->struct_mutex for in mmap offset ioctl
drm/armada: plug leak in dumb_map_offset
drm/armada: use unlocked gem unreferencing
diff --git a/drivers/gpu/drm/armada/armada_crtc.c b/drivers/gpu/drm/armada/armada_crtc.c
index 4123680..0293eb7 100644
--- a/drivers/gpu/drm/armada/armada_crtc.c
+++ b/drivers/gpu/drm/armada/armada_crtc.c
@@ -928,11 +928,10 @@
}
}
- mutex_lock(&dev->struct_mutex);
if (dcrtc->cursor_obj) {
dcrtc->cursor_obj->update = NULL;
dcrtc->cursor_obj->update_data = NULL;
- drm_gem_object_unreference(&dcrtc->cursor_obj->obj);
+ drm_gem_object_unreference_unlocked(&dcrtc->cursor_obj->obj);
}
dcrtc->cursor_obj = obj;
dcrtc->cursor_w = w;
@@ -942,14 +941,12 @@
obj->update_data = dcrtc;
obj->update = cursor_update;
}
- mutex_unlock(&dev->struct_mutex);
return ret;
}
static int armada_drm_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
{
- struct drm_device *dev = crtc->dev;
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
int ret;
@@ -957,11 +954,9 @@
if (!dcrtc->variant->has_spu_adv_reg)
return -EFAULT;
- mutex_lock(&dev->struct_mutex);
dcrtc->cursor_x = x;
dcrtc->cursor_y = y;
ret = armada_drm_crtc_cursor_update(dcrtc, false);
- mutex_unlock(&dev->struct_mutex);
return ret;
}
@@ -972,7 +967,7 @@
struct armada_private *priv = crtc->dev->dev_private;
if (dcrtc->cursor_obj)
- drm_gem_object_unreference(&dcrtc->cursor_obj->obj);
+ drm_gem_object_unreference_unlocked(&dcrtc->cursor_obj->obj);
priv->dcrtc[dcrtc->num] = NULL;
drm_crtc_cleanup(&dcrtc->crtc);
diff --git a/drivers/gpu/drm/armada/armada_debugfs.c b/drivers/gpu/drm/armada/armada_debugfs.c
index 471e456..d4f7ab0 100644
--- a/drivers/gpu/drm/armada/armada_debugfs.c
+++ b/drivers/gpu/drm/armada/armada_debugfs.c
@@ -21,9 +21,9 @@
struct armada_private *priv = dev->dev_private;
int ret;
- mutex_lock(&dev->struct_mutex);
+ mutex_lock(&priv->linear_lock);
ret = drm_mm_dump_table(m, &priv->linear);
- mutex_unlock(&dev->struct_mutex);
+ mutex_unlock(&priv->linear_lock);
return ret;
}
diff --git a/drivers/gpu/drm/armada/armada_drm.h b/drivers/gpu/drm/armada/armada_drm.h
index 4df6f2a..3b2bb61 100644
--- a/drivers/gpu/drm/armada/armada_drm.h
+++ b/drivers/gpu/drm/armada/armada_drm.h
@@ -57,7 +57,8 @@
DECLARE_KFIFO(fb_unref, struct drm_framebuffer *, 8);
struct drm_fb_helper *fbdev;
struct armada_crtc *dcrtc[2];
- struct drm_mm linear;
+ struct drm_mm linear; /* protected by linear_lock */
+ struct mutex linear_lock;
struct drm_property *csc_yuv_prop;
struct drm_property *csc_rgb_prop;
struct drm_property *colorkey_prop;
diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
index 77ab93d..3bd7e1c 100644
--- a/drivers/gpu/drm/armada/armada_drv.c
+++ b/drivers/gpu/drm/armada/armada_drv.c
@@ -102,6 +102,7 @@
dev->mode_config.preferred_depth = 24;
dev->mode_config.funcs = &armada_drm_mode_config_funcs;
drm_mm_init(&priv->linear, mem->start, resource_size(mem));
+ mutex_init(&priv->linear_lock);
ret = component_bind_all(dev->dev, dev);
if (ret)
diff --git a/drivers/gpu/drm/armada/armada_gem.c b/drivers/gpu/drm/armada/armada_gem.c
index 60a688e..6e731db 100644
--- a/drivers/gpu/drm/armada/armada_gem.c
+++ b/drivers/gpu/drm/armada/armada_gem.c
@@ -46,22 +46,26 @@
return roundup(size, PAGE_SIZE);
}
-/* dev->struct_mutex is held here */
void armada_gem_free_object(struct drm_gem_object *obj)
{
struct armada_gem_object *dobj = drm_to_armada_gem(obj);
+ struct armada_private *priv = obj->dev->dev_private;
DRM_DEBUG_DRIVER("release obj %p\n", dobj);
drm_gem_free_mmap_offset(&dobj->obj);
+ might_lock(&priv->linear_lock);
+
if (dobj->page) {
/* page backed memory */
unsigned int order = get_order(dobj->obj.size);
__free_pages(dobj->page, order);
} else if (dobj->linear) {
/* linear backed memory */
+ mutex_lock(&priv->linear_lock);
drm_mm_remove_node(dobj->linear);
+ mutex_unlock(&priv->linear_lock);
kfree(dobj->linear);
if (dobj->addr)
iounmap(dobj->addr);
@@ -144,10 +148,10 @@
if (!node)
return -ENOSPC;
- mutex_lock(&dev->struct_mutex);
+ mutex_lock(&priv->linear_lock);
ret = drm_mm_insert_node(&priv->linear, node, size, align,
DRM_MM_SEARCH_DEFAULT);
- mutex_unlock(&dev->struct_mutex);
+ mutex_unlock(&priv->linear_lock);
if (ret) {
kfree(node);
return ret;
@@ -158,9 +162,9 @@
/* Ensure that the memory we're returning is cleared. */
ptr = ioremap_wc(obj->linear->start, size);
if (!ptr) {
- mutex_lock(&dev->struct_mutex);
+ mutex_lock(&priv->linear_lock);
drm_mm_remove_node(obj->linear);
- mutex_unlock(&dev->struct_mutex);
+ mutex_unlock(&priv->linear_lock);
kfree(obj->linear);
obj->linear = NULL;
return -ENOMEM;
@@ -274,18 +278,16 @@
struct armada_gem_object *obj;
int ret = 0;
- mutex_lock(&dev->struct_mutex);
obj = armada_gem_object_lookup(dev, file, handle);
if (!obj) {
DRM_ERROR("failed to lookup gem object\n");
- ret = -EINVAL;
- goto err_unlock;
+ return -EINVAL;
}
/* Don't allow imported objects to be mapped */
if (obj->obj.import_attach) {
ret = -EINVAL;
- goto err_unlock;
+ goto err_unref;
}
ret = drm_gem_create_mmap_offset(&obj->obj);
@@ -294,9 +296,8 @@
DRM_DEBUG_DRIVER("handle %#x offset %llx\n", handle, *offset);
}
- drm_gem_object_unreference(&obj->obj);
- err_unlock:
- mutex_unlock(&dev->struct_mutex);
+ err_unref:
+ drm_gem_object_unreference_unlocked(&obj->obj);
return ret;
}
@@ -352,13 +353,13 @@
return -ENOENT;
if (!dobj->obj.filp) {
- drm_gem_object_unreference(&dobj->obj);
+ drm_gem_object_unreference_unlocked(&dobj->obj);
return -EINVAL;
}
addr = vm_mmap(dobj->obj.filp, 0, args->size, PROT_READ | PROT_WRITE,
MAP_SHARED, args->offset);
- drm_gem_object_unreference(&dobj->obj);
+ drm_gem_object_unreference_unlocked(&dobj->obj);
if (IS_ERR_VALUE(addr))
return addr;