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drm/i915: Don't pass stack garbage to pcode in the second data register

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Zero initialize val2 so that we don't pass stack garbage to
the pcode qgv read command. I suspect in this case pcode
just ignores the initial value in that registers, but better
safe than sorry.

Cc: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190710134937.25835-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Ville Syrjälä 2019-07-10 16:49:37 +03:00
parent a85fb46777
commit b12d5944fc
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/display/intel_bw.c
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@ -65,7 +65,7 @@ static int icl_pcode_read_qgv_point_info(struct drm_i915_private *dev_priv,
struct intel_qgv_point *sp,
int point)
{
u32 val = 0, val2;
u32 val = 0, val2 = 0;
int ret;
ret = sandybridge_pcode_read(dev_priv,