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Subject[PATCH 2/2] drm/nouveau: Add size to vbios.rom file in debugfs
Date
With this, nvbios /sys/kernel/debug/dri/*/vbios.rom now works!

Signed-off-by: Lyude Paul <lyude@redhat.com>
---
drivers/gpu/drm/nouveau/nouveau_debugfs.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
index 7379c20584a2..88a52f6b39fe 100644
--- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c
+++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
@@ -220,8 +220,9 @@ static const struct nouveau_debugfs_files {
int
nouveau_drm_debugfs_init(struct drm_minor *minor)
{
+ struct nouveau_drm *drm = nouveau_drm(minor->dev);
struct dentry *dentry;
- int i;
+ int i, ret;

for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
dentry = debugfs_create_file(nouveau_debugfs_files[i].name,
@@ -232,9 +233,23 @@ nouveau_drm_debugfs_init(struct drm_minor *minor)
return -ENOMEM;
}

- return drm_debugfs_create_files(nouveau_debugfs_list,
- NOUVEAU_DEBUGFS_ENTRIES,
- minor->debugfs_root, minor);
+ ret = drm_debugfs_create_files(nouveau_debugfs_list,
+ NOUVEAU_DEBUGFS_ENTRIES,
+ minor->debugfs_root, minor);
+ if (ret)
+ return ret;
+
+ /* Set the size of the vbios since we know it, and it's confusing to
+ * userspace if it wants to seek() but the file has a length of 0
+ */
+ dentry = debugfs_lookup("vbios.rom", minor->debugfs_root);
+ if (!dentry)
+ return 0;
+
+ d_inode(dentry)->i_size = drm->vbios.length;
+ dput(dentry);
+
+ return 0;
}

int
--
2.17.1
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