Revert "drm: drop redundant drm_file->is_master"
This reverts commit 48ba813701eb14b3008edefef4a0789b328e278c.
Thanks to Chris:
"drm_file->is_master is not synomous with having drm_file->master ==
drm_file->minor->master. This is because drm_file->master is the same
for all drm_files of the same generation and so when there is a master,
every drm_file believes itself to be the master. Confusion ensues and
things go pear shaped when one file is closed and there is no master
anymore."
Conflicts:
drivers/gpu/drm/drm_drv.c
drivers/gpu/drm/drm_stub.c
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index ca8bb1b..fa2be24 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -3244,7 +3244,7 @@
r->bpp = fb->bits_per_pixel;
r->pitch = fb->pitches[0];
if (fb->funcs->create_handle) {
- if (drm_is_master(file_priv) || capable(CAP_SYS_ADMIN) ||
+ if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
drm_is_control_client(file_priv)) {
ret = fb->funcs->create_handle(fb, file_priv,
&r->handle);
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 92bc6b1..3242e20 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -179,7 +179,7 @@
int ret = 0;
mutex_lock(&dev->master_mutex);
- if (drm_is_master(file_priv))
+ if (file_priv->is_master)
goto out_unlock;
if (file_priv->minor->master) {
@@ -193,10 +193,13 @@
}
file_priv->minor->master = drm_master_get(file_priv->master);
+ file_priv->is_master = 1;
if (dev->driver->master_set) {
ret = dev->driver->master_set(dev, file_priv, false);
- if (unlikely(ret != 0))
+ if (unlikely(ret != 0)) {
+ file_priv->is_master = 0;
drm_master_put(&file_priv->minor->master);
+ }
}
out_unlock:
@@ -210,7 +213,7 @@
int ret = -EINVAL;
mutex_lock(&dev->master_mutex);
- if (!drm_is_master(file_priv))
+ if (!file_priv->is_master)
goto out_unlock;
if (!file_priv->minor->master)
@@ -220,6 +223,7 @@
if (dev->driver->master_drop)
dev->driver->master_drop(dev, file_priv, false);
drm_master_put(&file_priv->minor->master);
+ file_priv->is_master = 0;
out_unlock:
mutex_unlock(&dev->master_mutex);
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 4b06094..79d5221 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -194,6 +194,7 @@
goto out_close;
}
+ priv->is_master = 1;
/* take another reference for the copy in the local file priv */
priv->master = drm_master_get(priv->minor->master);
priv->authenticated = 1;
@@ -425,7 +426,7 @@
mutex_lock(&dev->master_mutex);
- if (drm_is_master(file_priv)) {
+ if (file_priv->is_master) {
struct drm_master *master = file_priv->master;
/**
@@ -453,6 +454,7 @@
/* drop the master reference held by the file priv */
if (file_priv->master)
drm_master_put(&file_priv->master);
+ file_priv->is_master = 0;
mutex_unlock(&dev->master_mutex);
if (dev->driver->postclose)
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index d3d1a8c..40be746 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -607,7 +607,7 @@
return -EACCES;
/* MASTER is only for master or control clients */
- if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
+ if (unlikely((flags & DRM_MASTER) && !file_priv->is_master &&
!drm_is_control_client(file_priv)))
return -EACCES;
diff --git a/drivers/gpu/drm/drm_lock.c b/drivers/gpu/drm/drm_lock.c
index ea15725..e26b59e 100644
--- a/drivers/gpu/drm/drm_lock.c
+++ b/drivers/gpu/drm/drm_lock.c
@@ -112,7 +112,7 @@
/* don't set the block all signals on the master process for now
* really probably not the correct answer but lets us debug xkb
* xserver for now */
- if (!drm_is_master(file_priv)) {
+ if (!file_priv->is_master) {
sigemptyset(&dev->sigmask);
sigaddset(&dev->sigmask, SIGSTOP);
sigaddset(&dev->sigmask, SIGTSTP);
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 2dd19da..60998fc 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1260,7 +1260,7 @@
flags = 0;
if (args->flags & I915_EXEC_SECURE) {
- if (!drm_is_master(file) || !capable(CAP_SYS_ADMIN))
+ if (!file->is_master || !capable(CAP_SYS_ADMIN))
return -EPERM;
flags |= I915_DISPATCH_SECURE;
@@ -1369,7 +1369,7 @@
ret = i915_parse_cmds(ring,
batch_obj,
args->batch_start_offset,
- drm_is_master(file));
+ file->is_master);
if (ret)
goto err;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 63c4d6f..18b54ac 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -990,7 +990,7 @@
if (unlikely(ret != 0))
return ERR_PTR(-ERESTARTSYS);
- if (drm_is_master(file_priv)) {
+ if (file_priv->is_master) {
mutex_unlock(&dev->master_mutex);
return NULL;
}
diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c
index 72913b2..6f54ff4 100644
--- a/drivers/staging/imx-drm/imx-drm-core.c
+++ b/drivers/staging/imx-drm/imx-drm-core.c
@@ -182,7 +182,7 @@
{
int i;
- if (!drm_is_master(file))
+ if (!file->is_master)
return;
for (i = 0; i < MAX_CRTC; i++)
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index a576463..a12fbba 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -384,6 +384,8 @@
/** File private data */
struct drm_file {
unsigned authenticated :1;
+ /* Whether we're master for a minor. Protected by master_mutex */
+ unsigned is_master :1;
/* true when the client has asked us to expose stereo 3D mode flags */
unsigned stereo_allowed :1;
/*
@@ -1020,7 +1022,7 @@
/** \name Locks */
/*@{ */
struct mutex struct_mutex; /**< For others */
- struct mutex master_mutex; /**< For drm_minor::master */
+ struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
/*@} */
/** \name Usage Counters */
@@ -1158,21 +1160,6 @@
return file_priv->minor->type == DRM_MINOR_LEGACY;
}
-/**
- * drm_is_master() - Check whether a DRM open-file is DRM-Master
- * @file: DRM open-file context
- *
- * This checks whether a DRM open-file context is owner of the master context
- * attached to it. If a file owns a master context, it's called DRM-Master.
- * Per DRM device, only one such file can be DRM-Master at a time.
- *
- * Returns: True if the file is DRM-Master, otherwise false.
- */
-static inline bool drm_is_master(const struct drm_file *file)
-{
- return file->master && file->master == file->minor->master;
-}
-
/******************************************************************/
/** \name Internal function definitions */
/*@{*/