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Subject: [PATCH 1/1] =A0=A0=A0 drivers/gpu/drm/i915: Fixed uninitialized<br=
>=A0variables (warnings).<br>MIME-Version: 1.0<br>Content-Type: text/plain;=
 charset=3DUTF-8<br>Content-Transfer-Encoding: 8bit<br><br>As you see, this=
 modifications were really very important because if the remain variable re=
ceives a value lower or equals than 0 from the args-&gt;size variable, inde=
ed, a bad behavior could ocurrs.<br>
<br>Let me explain:<br>The variable ret would never be initialized if the f=
unction doesn&#39;t enter inside of the loop. So that, the function will re=
turn a strange (undefined) value when it reaches the final.<br><br>If you&#=
39;ve a better solution or if I commited a mistake in my changes, please ta=
lk me about. I&#39;m sure I&#39;m a newcomer, hehe.<br>
<br>I&#39;m using the GCC: gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)=
<br><br>Warnings received during make operation:<br>utroz at utrozpc:~/linux$ =
make &gt; make_output<br>=A0=A0=A0 : In function =91i915_gem_pread_ioctl=92=
:<br>drivers/gpu/drm/i915/i915_gem.c:455:21: warning: =91ret=92 may be used=
 uninitialized in this function [-Wuninitialized]<br>
drivers/gpu/drm/i915/i915_gem.c:390:38: note: =91ret=92 was declared here<b=
r>drivers/gpu/drm/i915/i915_gem.c: In function =91i915_gem_pwrite_ioctl=92:=
<br>drivers/gpu/drm/i915/i915_gem.c:871:21: warning: =91ret=92 may be used =
uninitialized in this function [-Wuninitialized]<br>
drivers/gpu/drm/i915/i915_gem.c:797:38: note: =91ret=92 was declared here<b=
r><br>Signed-off-by: Raphael S.Carvalho &lt;<a href=3D"mailto:rsc.utroz at gma=
il.com">rsc.utroz at gmail.com</a>&gt;<br>---<br>=A0drivers/gpu/drm/i915/i915_=
gem.c |=A0=A0 12 ++++++++++--<br>
=A01 files changed, 10 insertions(+), 2 deletions(-)<br><br>diff --git a/dr=
ivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c<br>index 0d=
1e4b7..b0a0004 100644<br>--- a/drivers/gpu/drm/i915/i915_gem.c<br>+++ b/dri=
vers/gpu/drm/i915/i915_gem.c<br>
@@ -392,6 +392,10 @@ i915_gem_shmem_pread_slow(struct drm_device *dev,<br>=
=A0<br>=A0=A0=A0=A0 user_data =3D (char __user *) (uintptr_t) args-&gt;data=
_ptr;<br>=A0=A0=A0=A0 remain =3D args-&gt;size;<br>+=A0=A0=A0 if (remain &l=
t;=3D 0) {<br>+=A0=A0=A0 =A0=A0=A0 ret =3D -EINVAL;<br>
+=A0=A0=A0 =A0=A0=A0 goto final;<br>+=A0=A0=A0 }<br>=A0<br>=A0=A0=A0=A0 obj=
_do_bit17_swizzling =3D i915_gem_object_needs_bit17_swizzle(obj);<br>=A0<br=
>@@ -451,7 +455,7 @@ out:<br>=A0=A0=A0=A0 /* Fixup: Kill any reinstated bac=
king storage pages */<br>=A0=A0=A0=A0 if (obj-&gt;madv =3D=3D __I915_MADV_P=
URGED)<br>
=A0=A0=A0=A0 =A0=A0=A0 i915_gem_object_truncate(obj);<br>-<br>+final:<br>=
=A0=A0=A0=A0 return ret;<br>=A0}<br>=A0<br>@@ -799,6 +803,10 @@ i915_gem_sh=
mem_pwrite_slow(struct drm_device *dev,<br>=A0<br>=A0=A0=A0=A0 user_data =
=3D (char __user *) (uintptr_t) args-&gt;data_ptr;<br>
=A0=A0=A0=A0 remain =3D args-&gt;size;<br>+=A0=A0=A0 if (remain &lt;=3D 0) =
{<br>+=A0=A0=A0 =A0=A0=A0 ret =3D -EINVAL;<br>+=A0=A0=A0 =A0=A0=A0 goto fin=
al;<br>+=A0=A0=A0 }<br>=A0<br>=A0=A0=A0=A0 obj_do_bit17_swizzling =3D i915_=
gem_object_needs_bit17_swizzle(obj);<br>=A0<br>@@ -867,7 +875,7 @@ out:<br>
=A0=A0=A0=A0 =A0=A0=A0 i915_gem_clflush_object(obj);<br>=A0=A0=A0=A0 =A0=A0=
=A0 intel_gtt_chipset_flush();<br>=A0=A0=A0=A0 }<br>-<br>+final:<br>=A0=A0=
=A0=A0 return ret;<br>=A0}<br>=A0<br>-- <br>1.7.5.4<br><br>

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