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drm/i915/gvt: ensure -ve return value is handled correctly

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An earlier fix changed the return type from find_bb_size however the
integer return is being assigned to a unsigned int so the -ve error
check will never be detected. Make bb_size an int to fix this.

Detected by CoverityScan CID#1456886 ("Unsigned compared against 0")

Fixes: 1e3197d6ad ("drm/i915/gvt: Refine error handling for perform_bb_shadow")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
(cherry picked from commit 24f8a29af4)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Colin Ian King 2017-09-19 16:55:34 +01:00 committed by Jani Nikula
parent 294cf1af8c
commit dcd1d8302a
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/gvt/cmd_parser.c
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@ -1628,7 +1628,7 @@ static int perform_bb_shadow(struct parser_exec_state *s)
struct intel_shadow_bb_entry *entry_obj;
struct intel_vgpu *vgpu = s->vgpu;
unsigned long gma = 0;
uint32_t bb_size;
int bb_size;
void *dst = NULL;
int ret = 0;