From 22bcfc6a4b2288675a54b761ebcd85b9613ab9a6 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 9 Aug 2012 15:07:02 +0200 Subject: [PATCH] drm/i915: use mutex_lock_interruptible for debugfs files It's no fun if your shell hangs when the driver has gone on vacation and you want to know why ... Reviewed-by: Damien Lespiau Signed-Off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_debugfs.c | 32 ++++++++++++++++++++++------- 1 file changed, 25 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index d836bf8f0f6..9c9e199970a 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -777,10 +777,14 @@ i915_error_state_write(struct file *filp, struct seq_file *m = filp->private_data; struct i915_error_state_file_priv *error_priv = m->private; struct drm_device *dev = error_priv->dev; + int ret; DRM_DEBUG_DRIVER("Resetting error state\n"); - mutex_lock(&dev->struct_mutex); + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + i915_destroy_error_state(dev); mutex_unlock(&dev->struct_mutex); @@ -1450,8 +1454,12 @@ static int i915_swizzle_info(struct seq_file *m, void *data) struct drm_info_node *node = (struct drm_info_node *) m->private; struct drm_device *dev = node->minor->dev; struct drm_i915_private *dev_priv = dev->dev_private; + int ret; + + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; - mutex_lock(&dev->struct_mutex); seq_printf(m, "bit6 swizzle for X-tiling = %s\n", swizzle_string(dev_priv->mm.bit_6_swizzle_x)); seq_printf(m, "bit6 swizzle for Y-tiling = %s\n", @@ -1652,7 +1660,7 @@ i915_ring_stop_write(struct file *filp, struct drm_device *dev = filp->private_data; struct drm_i915_private *dev_priv = dev->dev_private; char buf[20]; - int val = 0; + int val = 0, ret; if (cnt > 0) { if (cnt > sizeof(buf) - 1) @@ -1667,7 +1675,10 @@ i915_ring_stop_write(struct file *filp, DRM_DEBUG_DRIVER("Stopping rings 0x%08x\n", val); - mutex_lock(&dev->struct_mutex); + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + dev_priv->stop_rings = val; mutex_unlock(&dev->struct_mutex); @@ -1844,12 +1855,15 @@ i915_cache_sharing_read(struct file *filp, drm_i915_private_t *dev_priv = dev->dev_private; char buf[80]; u32 snpcr; - int len; + int len, ret; if (!(IS_GEN6(dev) || IS_GEN7(dev))) return -ENODEV; - mutex_lock(&dev_priv->dev->struct_mutex); + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + snpcr = I915_READ(GEN6_MBCUNIT_SNPCR); mutex_unlock(&dev_priv->dev->struct_mutex); @@ -1959,6 +1973,7 @@ static int i915_forcewake_release(struct inode *inode, struct file *file) { struct drm_device *dev = inode->i_private; struct drm_i915_private *dev_priv = dev->dev_private; + int ret; if (INTEL_INFO(dev)->gen < 6) return 0; @@ -1970,7 +1985,10 @@ static int i915_forcewake_release(struct inode *inode, struct file *file) * hanging here is probably a minor inconvenience not to be seen my * almost every user. */ - mutex_lock(&dev->struct_mutex); + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + gen6_gt_force_wake_put(dev_priv); mutex_unlock(&dev->struct_mutex);