From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D15840759B; Tue, 10 Mar 2026 09:01:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773133296; cv=none; b=OpoWwKjeiUaavHopmwnujFnGoZ6NJBQCZ65Cmj9eSr414aYVvhN26xw9f+oVeUzXA5IKrrJBVOebrSzF/3sD784dOTfiK2hJ8j38qJC/P4A9jRpCZIAJUHSgGVEbY6MtDeW3LxlpJJP8Q0+CBQ2nM9ZR54Cu5BSuwPImp6lb3oE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773133296; c=relaxed/simple; bh=+ZtddYTfxK4iy32tnlSe9dFpGEJUP8yEVRuq3mkv7P8=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=UC1s7osRpT1nuXQ2eC3K2hnPdLwBdSkTpq62wbmRJrnjaCmsgsZKJWyKHn9o/QBLXm0h0bSbEQ+c79b3dJEjgWz2fj+BtRTzZgDCxzC1CN9AhGlEI2mc8+bRd364wNz982EROBE6cD8MOOGkvN4jNXsr3zC5fALh61oXYUbfZK0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost (unknown [124.16.138.129]) by APP-05 (Coremail) with SMTP id zQCowACHGw_i3a9pWDQLCg--.28450S2; Tue, 10 Mar 2026 17:01:22 +0800 (CST) From: Chen Ni To: linux-fbdev@vger.kernel.org, linux-omap@vger.kernel.org Cc: deller@gmx.de, tglx@kernel.org, mingo@kernel.org, dri-devel@lists.freedesktop.org, Chen Ni Subject: [PATCH] video: fbdev: omapfb: Add missing error check for clk_get() Date: Tue, 10 Mar 2026 16:56:25 +0800 Message-Id: <20260310085625.2648545-1-nichen@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:zQCowACHGw_i3a9pWDQLCg--.28450S2 X-Coremail-Antispam: 1UD129KBjvJXoW7WFWUXr4kCw13Xr1DArW5ZFb_yoW8GF1DpF 4UJayFy3y7JFWvya1DGr4qqFyUK3W0yFWfuryvkwnYgF4Yvr4DWryxGFyUXF1fA3yfA3W2 qryjya1ktFya9aDanT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9m14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4j 6F4UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r106r15McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v26r12 6r1DMxkIecxEwVAFwVW8uwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8Jw CFI7km07C267AKxVWUXVWUAwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v2 6r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67 AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF04k26cxKx2IY s7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr 0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JU3b1nUUUUU= X-CM-SenderInfo: xqlfxv3q6l2u1dvotugofq/ The hwa742_init() function did not check the return value of clk_get(). This could lead to dereferencing an error pointer in subsequent clock operations, potentially causing a kernel crash. Fix this by adding a missing error check and ensuring proper clock resource cleanup on failure and driver removal. Signed-off-by: Chen Ni --- drivers/video/fbdev/omap/hwa742.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/video/fbdev/omap/hwa742.c b/drivers/video/fbdev/omap/hwa742.c index 64e76e1f5388..68a677f824e9 100644 --- a/drivers/video/fbdev/omap/hwa742.c +++ b/drivers/video/fbdev/omap/hwa742.c @@ -950,6 +950,8 @@ static int hwa742_init(struct omapfb_device *fbdev, int ext_mode, omapfb_conf = dev_get_platdata(fbdev->dev); hwa742.sys_ck = clk_get(NULL, "hwa_sys_ck"); + if (IS_ERR(hwa742.sys_ck)) + return PTR_ERR(hwa742.sys_ck); spin_lock_init(&hwa742.req_lock); @@ -1028,6 +1030,7 @@ static int hwa742_init(struct omapfb_device *fbdev, int ext_mode, err2: hwa742.int_ctrl->cleanup(); err1: + clk_put(hwa742.sys_ck); return r; } @@ -1037,6 +1040,7 @@ static void hwa742_cleanup(void) hwa742.extif->cleanup(); hwa742.int_ctrl->cleanup(); clk_disable_unprepare(hwa742.sys_ck); + clk_put(hwa742.sys_ck); } struct lcd_ctrl hwa742_ctrl = { -- 2.25.1