linux-kernel - [PATCH][next] drm/i915: fix incorrect return of an error status

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Message-Id: <20200518170910.58292-1-colin.king@canonical.com>
Date:   Mon, 18 May 2020 18:09:10 +0100
From:   Colin King <colin.king@...onical.com>
To:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Stanislav Lisovskiy <stanislav.lisovskiy@...el.com>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] drm/i915: fix incorrect return of an error status

From: Colin Ian King <colin.king@...onical.com>

Currently when a call to intel_atomic_get_dbuf_state fails the
error value being returns is a potentially uninitialized value
in variable ret.  Fix this by returning the error value of
new_dbuf_state.

Addresses-Coverity: ("Uninitialized scalar value")
Fixes: 3cf43cdc63fb ("drm/i915: Introduce proper dbuf state")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a21e36ed1a77..762a5184fc69 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5917,7 +5917,7 @@ skl_ddb_add_affected_pipes(struct intel_atomic_state *state)
 
 		new_dbuf_state = intel_atomic_get_dbuf_state(state);
 		if (IS_ERR(new_dbuf_state))
-			return ret;
+			return PTR_ERR(new_dbuf_state);
 
 		old_dbuf_state = intel_atomic_get_old_dbuf_state(state);
 
-- 
2.25.1