Subject: linux-next: manual merge of the drm-misc tree with the drm-intel tree

From: Stephen Rothwell <[email-masked]>
Date: Tue, 7 Mar 2017 10:48:03 +1100

Hi all,

Today's linux-next merge of the drm-misc tree got a conflict in:

  drivers/gpu/drm/i915/i915_debugfs.c

between commits:

  418e3cd80051 ("drm/i915: Show the current i915_params in debugfs/i915_capabilites")
  317eaa95081b ("drm/i915/debugfs: Add i915_hpd_storm_ctl")

from the drm-intel tree and commit:

  b05eeb0f47a3 ("drm/i915: Remove i915_debugfs_unregister()")

from the drm-misc tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc drivers/gpu/drm/i915/i915_debugfs.c
index 478f19d2f3d8,7d7244798507..000000000000
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@@ -35,49 -35,6 +35,23 @@@ static inline struct drm_i915_private *
  	return to_i915(node->minor->dev);
  }
  
- /* As the drm_debugfs_init() routines are called before dev->dev_private is
-  * allocated we need to hook into the minor for release. */
- static int
- drm_add_fake_info_node(struct drm_minor *minor,
- 		       struct dentry *ent,
- 		       const void *key)
- {
- 	struct drm_info_node *node;
- 
- 	node = kmalloc(sizeof(*node), GFP_KERNEL);
- 	if (node == NULL) {
- 		debugfs_remove(ent);
- 		return -ENOMEM;
- 	}
- 
- 	node->minor = minor;
- 	node->dent = ent;
- 	node->info_ent = (void *)key;
- 
- 	mutex_lock(&minor->debugfs_lock);
- 	list_add(&node->list, &minor->debugfs_list);
- 	mutex_unlock(&minor->debugfs_lock);
- 
- 	return 0;
- }
- 
 +static __always_inline void seq_print_param(struct seq_file *m,
 +					    const char *name,
 +					    const char *type,
 +					    const void *x)
 +{
 +	if (!__builtin_strcmp(type, "bool"))
 +		seq_printf(m, "i915.%s=%s\n", name, yesno(*(const bool *)x));
 +	else if (!__builtin_strcmp(type, "int"))
 +		seq_printf(m, "i915.%s=%d\n", name, *(const int *)x);
 +	else if (!__builtin_strcmp(type, "unsigned int"))
 +		seq_printf(m, "i915.%s=%u\n", name, *(const unsigned int *)x);
 +	else if (!__builtin_strcmp(type, "char *"))
 +		seq_printf(m, "i915.%s=%s\n", name, *(const char **)x);
 +	else
 +		BUILD_BUG();
 +}
 +
  static int i915_capabilities(struct seq_file *m, void *data)
  {
  	struct drm_i915_private *dev_priv = node_to_i915(m->private);
@@@ -4646,112 -4567,6 +4620,81 @@@ static const struct file_operations i91
  	.release = i915_forcewake_release,
  };
  
- static int i915_forcewake_create(struct dentry *root, struct drm_minor *minor)
- {
- 	struct dentry *ent;
- 
- 	ent = debugfs_create_file("i915_forcewake_user",
- 				  S_IRUSR,
- 				  root, to_i915(minor->dev),
- 				  &i915_forcewake_fops);
- 	if (!ent)
- 		return -ENOMEM;
- 
- 	return drm_add_fake_info_node(minor, ent, &i915_forcewake_fops);
- }
- 
 +static int i915_hpd_storm_ctl_show(struct seq_file *m, void *data)
 +{
 +	struct drm_i915_private *dev_priv = m->private;
 +	struct i915_hotplug *hotplug = &dev_priv->hotplug;
 +
 +	seq_printf(m, "Threshold: %d\n", hotplug->hpd_storm_threshold);
 +	seq_printf(m, "Detected: %s\n",
 +		   yesno(delayed_work_pending(&hotplug->reenable_work)));
 +
 +	return 0;
 +}
 +
 +static ssize_t i915_hpd_storm_ctl_write(struct file *file,
 +					const char __user *ubuf, size_t len,
 +					loff_t *offp)
 +{
 +	struct seq_file *m = file->private_data;
 +	struct drm_i915_private *dev_priv = m->private;
 +	struct i915_hotplug *hotplug = &dev_priv->hotplug;
 +	unsigned int new_threshold;
 +	int i;
 +	char *newline;
 +	char tmp[16];
 +
 +	if (len >= sizeof(tmp))
 +		return -EINVAL;
 +
 +	if (copy_from_user(tmp, ubuf, len))
 +		return -EFAULT;
 +
 +	tmp[len] = '\0';
 +
 +	/* Strip newline, if any */
 +	newline = strchr(tmp, '\n');
 +	if (newline)
 +		*newline = '\0';
 +
 +	if (strcmp(tmp, "reset") == 0)
 +		new_threshold = HPD_STORM_DEFAULT_THRESHOLD;
 +	else if (kstrtouint(tmp, 10, &new_threshold) != 0)
 +		return -EINVAL;
 +
 +	if (new_threshold > 0)
 +		DRM_DEBUG_KMS("Setting HPD storm detection threshold to %d\n",
 +			      new_threshold);
 +	else
 +		DRM_DEBUG_KMS("Disabling HPD storm detection\n");
 +
 +	spin_lock_irq(&dev_priv->irq_lock);
 +	hotplug->hpd_storm_threshold = new_threshold;
 +	/* Reset the HPD storm stats so we don't accidentally trigger a storm */
 +	for_each_hpd_pin(i)
 +		hotplug->stats[i].count = 0;
 +	spin_unlock_irq(&dev_priv->irq_lock);
 +
 +	/* Re-enable hpd immediately if we were in an irq storm */
 +	flush_delayed_work(&dev_priv->hotplug.reenable_work);
 +
 +	return len;
 +}
 +
 +static int i915_hpd_storm_ctl_open(struct inode *inode, struct file *file)
 +{
 +	return single_open(file, i915_hpd_storm_ctl_show, inode->i_private);
 +}
 +
 +static const struct file_operations i915_hpd_storm_ctl_fops = {
 +	.owner = THIS_MODULE,
 +	.open = i915_hpd_storm_ctl_open,
 +	.read = seq_read,
 +	.llseek = seq_lseek,
 +	.release = single_release,
 +	.write = i915_hpd_storm_ctl_write
 +};
 +
- static int i915_debugfs_create(struct dentry *root,
- 			       struct drm_minor *minor,
- 			       const char *name,
- 			       const struct file_operations *fops)
- {
- 	struct dentry *ent;
- 
- 	ent = debugfs_create_file(name,
- 				  S_IRUGO | S_IWUSR,
- 				  root, to_i915(minor->dev),
- 				  fops);
- 	if (!ent)
- 		return -ENOMEM;
- 
- 	return drm_add_fake_info_node(minor, ent, fops);
- }
- 
  static const struct drm_info_list i915_debugfs_list[] = {
  	{"i915_capabilities", i915_capabilities, 0},
  	{"i915_gem_objects", i915_gem_object_info, 0},
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