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drm/i915: Drop struct_mutex from suspend state save/restore

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struct_mutex provides no serialisation of the registers and data
structures being saved and restored across suspend/resume. It is
completely superfluous here.

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/20191004134015.13204-19-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-10-04 14:40:13 +01:00
parent 6c3828ab09
commit 3d88f76dec
1 changed files with 0 additions and 8 deletions
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8
drivers/gpu/drm/i915/i915_suspend.c
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@ -66,8 +66,6 @@ int i915_save_state(struct drm_i915_private *dev_priv)
struct pci_dev *pdev = dev_priv->drm.pdev;
int i;
mutex_lock(&dev_priv->drm.struct_mutex);
i915_save_display(dev_priv);
if (IS_GEN(dev_priv, 4))
@ -101,8 +99,6 @@ int i915_save_state(struct drm_i915_private *dev_priv)
dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i));
}
mutex_unlock(&dev_priv->drm.struct_mutex);
return 0;
}
@ -111,8 +107,6 @@ int i915_restore_state(struct drm_i915_private *dev_priv)
struct pci_dev *pdev = dev_priv->drm.pdev;
int i;
mutex_lock(&dev_priv->drm.struct_mutex);
if (IS_GEN(dev_priv, 4))
pci_write_config_word(pdev, GCDGMBUS,
dev_priv->regfile.saveGCDGMBUS);
@ -146,8 +140,6 @@ int i915_restore_state(struct drm_i915_private *dev_priv)
I915_WRITE(SWF3(i), dev_priv->regfile.saveSWF3[i]);
}
mutex_unlock(&dev_priv->drm.struct_mutex);
intel_gmbus_reset(dev_priv);
return 0;