From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 1DFCF23BD1B; Fri, 4 Sep 2026 05:17:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788499059; cv=none; b=dMnu+GgzsPkP10AC62suikJBUZvADKi38Poze3QX1umJL47q+CE64yGdCFV/Ho0kYxZ7biDtENTdv1oqmrZdThc+RbsEymE2rNRyD8y4B7YI8Yzt2JzpLiOkssvIxavY8ZmdHzo7nuiXGJmqsUtDMvgpp4ndP7J7ok2c5d7Bvd0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788499059; c=relaxed/simple; bh=/Yoe7FzvzjhR9pUkNjmk0qQ2ZFFPPB7VztrFGpU7CZM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=a2mwCZRAsiSlB9lK852FFgTtd2/g2E/lviKufM4q1fbck22Mg7klAdJH4dqNBAz7j7Kkf8nR88kr1cbeE6DgdEGOirwSHQy0B7hkSHghx0qFQSnT6QHmG25OAYezr3UZKlS3bciGee5hd+WH7Gak3/R5R0aAi1nJfSXZvHc0GBU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=yF2XvktB; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="yF2XvktB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7063E1F00A3E; Fri, 4 Sep 2026 05:17:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788499058; bh=qxE7LlfryNdL0HjY5RcpimifOp6s1ejsBEsbKmW/+3s=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=yF2XvktBbFnLp0xnecTFwix25ey7wPqLxBtlnUzLgv7D3LfWIn/sPBMQ6pqZAFrmB Qsg8QP4db1JWTvUAz5q3Tu97bkUkIyWAMzQnQn2Wz9VUnnUTrzcMcGfC/89Xkz1Yh1 Xk3LNH/L1wSJBj0fcaarDy+FdmkGRdTd5koRoHQg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Runyu Xiao , Helge Deller Subject: [PATCH 7.2 283/713] fbdev: omapfb: panel-dsi-cm: initialize lock before registering display Date: Fri, 4 Sep 2026 06:54:11 +0200 Message-ID: <20260904045810.183631108@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260904045803.810145556@linuxfoundation.org> References: <20260904045803.810145556@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Runyu Xiao commit f8e43fe0f22b7137ce456e6fe3581d3098174f74 upstream. dsicm_probe() registers the display before initializing ddata->lock. Once omapdss_register_display() publishes the display, another consumer can reach a dsicm callback that takes this mutex while it is still uninitialized. Initialize the mutex before registering the display so the published callbacks always see a valid lock. Fixes: f76ee892a99e ("omapfb: copy omapdss & displays for omapfb") Cc: stable@vger.kernel.org Signed-off-by: Runyu Xiao Signed-off-by: Helge Deller Signed-off-by: Greg Kroah-Hartman --- drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c +++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c @@ -1150,14 +1150,14 @@ static int dsicm_probe(struct platform_d dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE | OMAP_DSS_DISPLAY_CAP_TEAR_ELIM; + mutex_init(&ddata->lock); + r = omapdss_register_display(dssdev); if (r) { dev_err(dev, "Failed to register panel\n"); goto err_reg; } - mutex_init(&ddata->lock); - atomic_set(&ddata->do_update, 0); ddata->reset_gpio = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);