From ba198a10bfbeb1137d8c25fa569b562e8b626b05 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 4 Oct 2019 14:40:11 +0100
Subject: drm/i915: Drop struct_mutex guard from debugfs/framebuffer_info
Git-commit: ba198a10bfbeb1137d8c25fa569b562e8b626b05
Patch-mainline: v5.5-rc1
References: bsc#1152489
It protects nothing being accessed for the intel_framebuffer, so it's
own locking had better be sufficient.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191004134015.13204-17-chris@chris-wilson.co.uk
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/i915_debugfs.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index b04cebc26eca..77933b23070e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1534,11 +1534,6 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
struct drm_device *dev = &dev_priv->drm;
struct intel_framebuffer *fbdev_fb = NULL;
struct drm_framebuffer *drm_fb;
- int ret;
-
- ret = mutex_lock_interruptible(&dev->struct_mutex);
- if (ret)
- return ret;
#ifdef CONFIG_DRM_FBDEV_EMULATION
if (dev_priv->fbdev && dev_priv->fbdev->helper.fb) {
@@ -1573,7 +1568,6 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
seq_putc(m, '\n');
}
mutex_unlock(&dev->mode_config.fb_lock);
- mutex_unlock(&dev->struct_mutex);
return 0;
}
--
2.28.0