From 3553a8eadb711e9236e517e44be67665bb5b4c65 Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Mon, 9 Mar 2015 14:17:58 +0000 Subject: [PATCH] drm/i915: Exit early from psr_status if PSR is not supported by the device Static analysis was complaining that a path existed where we could use stat[] uninitialized. Fix this by simplifying the logic to exit early if PSR isn't supported. Signed-off-by: Damien Lespiau Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_debugfs.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index f293caf74dc7..74bc89bf8914 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2234,6 +2234,11 @@ static int i915_edp_psr_status(struct seq_file *m, void *data) enum pipe pipe; bool enabled = false; + if (!HAS_PSR(dev)) { + seq_puts(m, "PSR not supported\n"); + return 0; + } + intel_runtime_pm_get(dev_priv); mutex_lock(&dev_priv->psr.lock); @@ -2246,17 +2251,15 @@ static int i915_edp_psr_status(struct seq_file *m, void *data) seq_printf(m, "Re-enable work scheduled: %s\n", yesno(work_busy(&dev_priv->psr.work.work))); - if (HAS_PSR(dev)) { - if (HAS_DDI(dev)) - enabled = I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE; - else { - for_each_pipe(dev_priv, pipe) { - stat[pipe] = I915_READ(VLV_PSRSTAT(pipe)) & - VLV_EDP_PSR_CURR_STATE_MASK; - if ((stat[pipe] == VLV_EDP_PSR_ACTIVE_NORFB_UP) || - (stat[pipe] == VLV_EDP_PSR_ACTIVE_SF_UPDATE)) - enabled = true; - } + if (HAS_DDI(dev)) + enabled = I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE; + else { + for_each_pipe(dev_priv, pipe) { + stat[pipe] = I915_READ(VLV_PSRSTAT(pipe)) & + VLV_EDP_PSR_CURR_STATE_MASK; + if ((stat[pipe] == VLV_EDP_PSR_ACTIVE_NORFB_UP) || + (stat[pipe] == VLV_EDP_PSR_ACTIVE_SF_UPDATE)) + enabled = true; } } seq_printf(m, "HW Enabled & Active bit: %s", yesno(enabled)); @@ -2273,7 +2276,7 @@ static int i915_edp_psr_status(struct seq_file *m, void *data) yesno((bool)dev_priv->psr.link_standby)); /* CHV PSR has no kind of performance counter */ - if (HAS_PSR(dev) && HAS_DDI(dev)) { + if (HAS_DDI(dev)) { psrperf = I915_READ(EDP_PSR_PERF_CNT(dev)) & EDP_PSR_PERF_CNT_MASK; -- 2.20.1