Merge tag 'drm-misc-next-fixes-2026-04-09' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

Short summary of fixes pull:

dma-buf:
- fence: fix docs for dma_fence_unlock_irqrestore()

fb-helper:
- unlock in error path

gem-shmem:
- fix PMD write update

gem-vram:
- remove obsolete documentation

ivpu:
- fix device-recovery handling

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

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20260409113921.GA181028@linux.fritz.box

3 files changed, 37 insertions, 20 deletions

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index c4adad77c8d6..a80a335f4148 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1627,8 +1627,10 @@ __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper)
 	drm_client_modeset_probe(&fb_helper->client, width, height);
 
 	info = drm_fb_helper_alloc_info(fb_helper);
-	if (IS_ERR(info))
+	if (IS_ERR(info)) {
+		mutex_unlock(&fb_helper->lock);
 		return PTR_ERR(info);
+	}
 
 	ret = drm_fb_helper_single_fb_probe(fb_helper);
 	if (ret < 0) {
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 2062ca607833..545933c7f712 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -554,6 +554,21 @@ int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev,
 }
 EXPORT_SYMBOL_GPL(drm_gem_shmem_dumb_create);
 
+static void drm_gem_shmem_record_mkwrite(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct drm_gem_object *obj = vma->vm_private_data;
+	struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
+	loff_t num_pages = obj->size >> PAGE_SHIFT;
+	pgoff_t page_offset = vmf->pgoff - vma->vm_pgoff; /* page offset within VMA */
+
+	if (drm_WARN_ON(obj->dev, !shmem->pages || page_offset >= num_pages))
+		return;
+
+	file_update_time(vma->vm_file);
+	folio_mark_dirty(page_folio(shmem->pages[page_offset]));
+}
+
 static vm_fault_t try_insert_pfn(struct vm_fault *vmf, unsigned int order,
 				 unsigned long pfn)
 {
@@ -566,8 +581,23 @@ static vm_fault_t try_insert_pfn(struct vm_fault *vmf, unsigned int order,
 
 		if (aligned &&
 		    folio_test_pmd_mappable(page_folio(pfn_to_page(pfn)))) {
+			vm_fault_t ret;
+
 			pfn &= PMD_MASK >> PAGE_SHIFT;
-			return vmf_insert_pfn_pmd(vmf, pfn, false);
+
+			/* Unlike PTEs which are automatically upgraded to
+			 * writeable entries, the PMD upgrades go through
+			 * .huge_fault(). Make sure we pass the "write" info
+			 * along in that case.
+			 * This also means we have to record the write fault
+			 * here, instead of in .pfn_mkwrite().
+			 */
+			ret = vmf_insert_pfn_pmd(vmf, pfn,
+						 vmf->flags & FAULT_FLAG_WRITE);
+			if (ret == VM_FAULT_NOPAGE && (vmf->flags & FAULT_FLAG_WRITE))
+				drm_gem_shmem_record_mkwrite(vmf);
+
+			return ret;
 		}
 #endif
 	}
@@ -655,19 +685,7 @@ static void drm_gem_shmem_vm_close(struct vm_area_struct *vma)
 
 static vm_fault_t drm_gem_shmem_pfn_mkwrite(struct vm_fault *vmf)
 {
-	struct vm_area_struct *vma = vmf->vma;
-	struct drm_gem_object *obj = vma->vm_private_data;
-	struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
-	loff_t num_pages = obj->size >> PAGE_SHIFT;
-	pgoff_t page_offset = vmf->pgoff - vma->vm_pgoff; /* page offset within VMA */
-
-	if (drm_WARN_ON(obj->dev, !shmem->pages || page_offset >= num_pages))
-		return VM_FAULT_SIGBUS;
-
-	file_update_time(vma->vm_file);
-
-	folio_mark_dirty(page_folio(shmem->pages[page_offset]));
-
+	drm_gem_shmem_record_mkwrite(vmf);
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index d7fcced75e79..bca802ccddee 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -49,15 +49,12 @@ static const struct drm_gem_object_funcs drm_gem_vram_object_funcs;
  * To initialize the VRAM helper library call drmm_vram_helper_init().
  * The function allocates and initializes an instance of &struct drm_vram_mm
  * in &struct drm_device.vram_mm . Use &DRM_GEM_VRAM_DRIVER to initialize
- * &struct drm_driver and  &DRM_VRAM_MM_FILE_OPERATIONS to initialize
+ * &struct drm_driver and &DEFINE_DRM_GEM_FOPS to define
  * &struct file_operations; as illustrated below.
  *
  * .. code-block:: c
  *
- *	struct file_operations fops ={
- *		.owner = THIS_MODULE,
- *		DRM_VRAM_MM_FILE_OPERATION
- *	};
+ *	DEFINE_DRM_GEM_FOPS(fops);
  *	struct drm_driver drv = {
  *		.driver_feature = DRM_ ... ,
  *		.fops = &fops,