diff options
| author | Ben Widawsky <ben@bwidawsk.net> | 2011-04-25 20:11:50 +0100 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-05-10 13:56:47 -0700 |
| commit | d1ebd816e6d7967c764f0cfa7d718f7c5cc7a8e4 (patch) | |
| tree | 18857de30c385fa2a67fa3337c37806db876a603 /drivers/gpu/drm/i915 | |
| parent | fcca7926299944841569515da321bef9655b7703 (diff) | |
drm/i915: forcewake struct mutex locking fixes
Found by the new strict checking for the mutex being held whilst
manipulating the forcewake status.
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 9 |
2 files changed, 17 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 3b1147d9023a..9069f284495f 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -853,6 +853,7 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused) struct drm_info_node *node = (struct drm_info_node *) m->private; struct drm_device *dev = node->minor->dev; drm_i915_private_t *dev_priv = dev->dev_private; + int ret; if (IS_GEN5(dev)) { u16 rgvswctl = I915_READ16(MEMSWCTL); @@ -874,6 +875,10 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused) int max_freq; /* RPSTAT1 is in the GT power well */ + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + gen6_gt_force_wake_get(dev_priv); rpstat = I915_READ(GEN6_RPSTAT1); @@ -884,6 +889,9 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused) rpcurdown = I915_READ(GEN6_RP_CUR_DOWN); rpprevdown = I915_READ(GEN6_RP_PREV_DOWN); + gen6_gt_force_wake_put(dev_priv); + mutex_unlock(&dev->struct_mutex); + seq_printf(m, "GT_PERF_STATUS: 0x%08x\n", gt_perf_status); seq_printf(m, "RPSTAT1: 0x%08x\n", rpstat); seq_printf(m, "Render p-state ratio: %d\n", @@ -918,8 +926,6 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused) max_freq = rp_state_cap & 0xff; seq_printf(m, "Max non-overclocked (RP0) frequency: %dMHz\n", max_freq * 50); - - gen6_gt_force_wake_put(dev_priv); } else { seq_printf(m, "no P-state info available\n"); } diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 220c3e0ea0a6..5504ff2a109d 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2585,7 +2585,11 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc) ironlake_pch_enable(crtc); intel_crtc_load_lut(crtc); + + mutex_lock(&dev->struct_mutex); intel_update_fbc(dev); + mutex_unlock(&dev->struct_mutex); + intel_crtc_update_cursor(crtc, true); } @@ -2681,8 +2685,11 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc) intel_crtc->active = false; intel_update_watermarks(dev); + + mutex_lock(&dev->struct_mutex); intel_update_fbc(dev); intel_clear_scanline_wait(dev); + mutex_unlock(&dev->struct_mutex); } static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode) @@ -6973,6 +6980,7 @@ void gen6_enable_rps(struct drm_i915_private *dev_priv) * userspace... */ I915_WRITE(GEN6_RC_STATE, 0); + mutex_lock(&dev_priv->dev->struct_mutex); gen6_gt_force_wake_get(dev_priv); /* disable the counters and set deterministic thresholds */ @@ -7075,6 +7083,7 @@ void gen6_enable_rps(struct drm_i915_private *dev_priv) I915_WRITE(GEN6_PMINTRMSK, 0); gen6_gt_force_wake_put(dev_priv); + mutex_unlock(&dev_priv->dev->struct_mutex); } void intel_enable_clock_gating(struct drm_device *dev) |