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drm/amd/display: fix memory leaks on error exit return

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Currently in the case where some of the allocations fail for dce110_tgv,
dce110_xfmv, dce110_miv or dce110_oppv then the exit return path ends
up leaking allocated objects. Fix this by kfree'ing them before returning.
Also re-work the comparison of the null pointers to use the !ptr idiom.

Detected by CoverityScan, CID#1460246, 1460325, 1460324, 1460392
("Resource Leak")

Fixes: c4562236b3bc ("drm/amd/dc: Add dc display driver (v2)")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Colin Ian King 2017-11-22 16:47:35 +00:00 committed by Alex Deucher
parent 93984bbc70
commit 2f2c3b36fc
1 changed files with 7 additions and 5 deletions
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12
drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
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@ -1037,11 +1037,13 @@ static bool underlay_create(struct dc_context *ctx, struct resource_pool *pool)
struct dce110_opp *dce110_oppv = kzalloc(sizeof(*dce110_oppv),
GFP_KERNEL);
if ((dce110_tgv == NULL) ||
(dce110_xfmv == NULL) ||
(dce110_miv == NULL) ||
(dce110_oppv == NULL))
return false;
if (!dce110_tgv || !dce110_xfmv || !dce110_miv || !dce110_oppv) {
kfree(dce110_tgv);
kfree(dce110_xfmv);
kfree(dce110_miv);
kfree(dce110_oppv);
return false;
}
dce110_opp_v_construct(dce110_oppv, ctx);