Messages in this thread Patch in this message |  | | | From | Alan Cox <> | | Subject | [PATCH 02/12] gma500: Re-order checks and dereferences in psb_intel_lvds | | Date | Fri, 08 Jul 2011 09:43:15 +0100 |
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From: Alan Cox <alan@linux.intel.com>
Dan Carpenter reports:
Smatch complains about 6a7afe3acc4b "gma500: continue abstracting platform specific code"
drivers/staging/gma500/psb_intel_lvds.c +579 psb_intel_lvds_set_property(7) warn: variable dereferenced before check 'encoder'
--- a/drivers/staging/gma500/psb_intel_lvds.c +++ b/drivers/staging/gma500/psb_intel_lvds.c @@ -575,11 +575,12 @@ int psb_intel_lvds_set_property(struct drm_connector *connector, struct drm_property *property, uint64_t value) { - struct drm_encoder *pEncoder = connector->encoder; + struct drm_encoder *encoder = connector->encoder; + struct drm_psb_private *dev_priv = encoder->dev->dev_private; ^^^^^^^^^^^^ dereference encoder here.
Signed-off-by: Alan Cox <alan@linux.intel.com> ---
drivers/staging/gma500/psb_intel_lvds.c | 13 +++++++++---- 1 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/gma500/psb_intel_lvds.c b/drivers/staging/gma500/psb_intel_lvds.c index 4a0d234..1e1e788 100644 --- a/drivers/staging/gma500/psb_intel_lvds.c +++ b/drivers/staging/gma500/psb_intel_lvds.c @@ -574,9 +574,14 @@ int psb_intel_lvds_set_property(struct drm_connector *connector, uint64_t value) { struct drm_encoder *encoder = connector->encoder; - struct drm_psb_private *dev_priv = encoder->dev->dev_private; + struct drm_psb_private *dev_priv; + + if (!encoder) + return -1; - if (!strcmp(property->name, "scaling mode") && encoder) { + dev_priv = encoder->dev->dev_private; + + if (!strcmp(property->name, "scaling mode")) { struct psb_intel_crtc *pPsbCrtc = to_psb_intel_crtc(encoder->crtc); uint64_t curValue; @@ -617,7 +622,7 @@ int psb_intel_lvds_set_property(struct drm_connector *connector, encoder->crtc->fb)) goto set_prop_error; } - } else if (!strcmp(property->name, "backlight") && encoder) { + } else if (!strcmp(property->name, "backlight")) { if (drm_connector_property_set_value(connector, property, value)) @@ -631,7 +636,7 @@ int psb_intel_lvds_set_property(struct drm_connector *connector, } #endif } - } else if (!strcmp(property->name, "DPMS") && encoder) { + } else if (!strcmp(property->name, "DPMS")) { struct drm_encoder_helper_funcs *pEncHFuncs = encoder->helper_private; pEncHFuncs->dpms(encoder, value);
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