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drm/i915/selftests: fix uninitialized variable sum when summing up values

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Currently the variable sum is not uninitialized and hence will cause an
incorrect result in the summation values.  Fix this by initializing
sum to the first item in the summation.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: 3c7a44bbbf ("drm/i915/selftests: Perform some basic cycle counting of MI ops")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191210143205.338308-1-colin.king@canonical.com
This commit is contained in:
Colin Ian King 2019-12-10 14:32:05 +00:00 committed by Chris Wilson
parent 82c69bf586
commit 1805ec67b1
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/gt/selftest_engine_cs.c
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@ -108,7 +108,7 @@ static u32 trifilter(u32 *a)
sort(a, COUNT, sizeof(*a), cmp_u32, NULL);
sum += mul_u32_u32(a[2], 2);
sum = mul_u32_u32(a[2], 2);
sum += a[1];
sum += a[3];