linux-kernel - [PATCH 4.16 192/279] drm/omap: silence unititialized variable warning

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Date:   Mon, 18 Jun 2018 10:12:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Sean Paul <seanpaul@...omium.org>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.16 192/279] drm/omap: silence unititialized variable warning

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit 4a9fbfcab19d3f71ad2bf0bcb653c4ee84e69c7f ]

Smatch complains that "area_free" could be used without being
initialized.  This code is several years old and premusably works fine
so this can't be a very serious bug.  But it's easy enough to silence
the warning.  If "area_free" is false at the end of the function then
we return -ENOMEM.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180418142937.GA13828@mwanda
Signed-off-by: Sean Paul <seanpaul@...omium.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/omapdrm/tcm-sita.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/omapdrm/tcm-sita.c
+++ b/drivers/gpu/drm/omapdrm/tcm-sita.c
@@ -90,7 +90,7 @@ static int l2r_t2b(uint16_t w, uint16_t
 {
 	int i;
 	unsigned long index;
-	bool area_free;
+	bool area_free = false;
 	unsigned long slots_per_band = PAGE_SIZE / slot_bytes;
 	unsigned long bit_offset = (offset > 0) ? offset / slot_bytes : 0;
 	unsigned long curr_bit = bit_offset;