From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 787EC26CE32; Mon, 13 Apr 2026 16:20:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097221; cv=none; b=awX3C+lpmfuLblBgcXEM9aC8YksUjg3Qgtp+1Q+C/mGWGhyUz+/wtUqe0fLjpnZKrCF2No1ayX+fKOyR5Qutq40U3qLIGqzuVTL5mq/DoVGyCkLnwbRFoT4/iG0NGBKSXwKqxdrsy9LHonDRJq8bs1X0jf6aMDGLbviJCm/F4Zs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097221; c=relaxed/simple; bh=VSd8xqjU6QYZaas245o4aE8uwwg319yVsrPjQH1iM7Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gkLxn0Z7xMJhq0myF9Ft3mCWKu5daJUQzlh7p+g+mkWMy9vo0bCwpirwAWv2PEaaJ4+lGu2FXo2V3F5D2SxtmXtlzaX2/xpIyYe/FAXKhfMvlQCV6xuvu6jMJh/ysJ2/1nNkNL67tVJ5O89+IKdQP9BFDuPMsEQbuNx0beCTBCI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=v8iN8zqz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="v8iN8zqz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0BF77C2BCAF; Mon, 13 Apr 2026 16:20:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776097221; bh=VSd8xqjU6QYZaas245o4aE8uwwg319yVsrPjQH1iM7Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=v8iN8zqzICqBuNPwGVZc8GfB8PQEuSM0EEq19EWf/NmCNUZlpy1HUIVpuMj70ksXD 4s5YwEtI7eM8R0Bd0lAMYwvOlXOZL46D5vKic4sc1rpD/OrF7Q8YU2EaMj3sSAnEHE Shdg7irC3IH1bupRr6//Mt5bZv5s60wHJ4LwvDiU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thierry Reding , Johan Hovold , Sasha Levin Subject: [PATCH 5.15 020/570] drm/tegra: dsi: fix device leak on probe Date: Mon, 13 Apr 2026 17:52:31 +0200 Message-ID: <20260413155831.174644642@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold [ Upstream commit bfef062695570842cf96358f2f46f4c6642c6689 ] Make sure to drop the reference taken when looking up the companion (ganged) device and its driver data during probe(). Note that holding a reference to a device does not prevent its driver data from going away so there is no point in keeping the reference. Fixes: e94236cde4d5 ("drm/tegra: dsi: Add ganged mode support") Fixes: 221e3638feb8 ("drm/tegra: Fix reference leak in tegra_dsi_ganged_probe") Cc: stable@vger.kernel.org # 3.19: 221e3638feb8 Cc: Thierry Reding Signed-off-by: Johan Hovold Signed-off-by: Thierry Reding Link: https://patch.msgid.link/20251121164201.13188-1-johan@kernel.org Signed-off-by: Sasha Levin --- drivers/gpu/drm/tegra/dsi.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index 7bb26655cb3cc..74d27b564d564 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -1539,11 +1539,9 @@ static int tegra_dsi_ganged_probe(struct tegra_dsi *dsi) return -EPROBE_DEFER; dsi->slave = platform_get_drvdata(gangster); - - if (!dsi->slave) { - put_device(&gangster->dev); + put_device(&gangster->dev); + if (!dsi->slave) return -EPROBE_DEFER; - } dsi->slave->master = dsi; } -- 2.51.0