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 C55D5349B1C; Thu, 2 Jul 2026 16:52:29 +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=1783011150; cv=none; b=tVqekm99G7oHr22xkZIn0UWEPxI6OjFZxU1hSlNeVGwYvq3eBXhY79ocYMYKreO+4hNlmqrS+3pH9BxHxtdNNfEveyJgzy/fROvTL28N6Q9sgBOhyLwTxuEwdTaU9ce+Qw+YXFeFj/AF5l2rS2AgGCB6qv9ovXI9yNNWUH5aUM8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783011150; c=relaxed/simple; bh=wBnl4nrvEhmNqY+hy3wpLuX2ia2mWNp0mMDcJ+dEfKY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=WFnwzYxoSvm5EBJDe5r5jp8FXsHwtSvIIGNWbVjsN6V+462PbPwPGwS2hELmev5iPdiQdU1ggSY8JzGYvt3y/IzjDMkAqq7ygAFdGOTp8LUH8a58IW3/0Ktbla1b9/EDeuwpHaeoXGssLmu001N2E427MYie5AjqEluQmVrtEWQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rd4kVl9k; 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="rd4kVl9k" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 366501F000E9; Thu, 2 Jul 2026 16:52:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1783011149; bh=7+bnWUlX4BqEK1vLar+uISHcvj6a+W1nFXJH9Dvgvpk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=rd4kVl9klvNRuUayrbCl3eWKufZO4PeEUNlFJh8KnDh6sY07X1x9obFqYrc6Ve4NG pCTHrDFP4rX/rkez1FufAFH3SVK4Yx09a4IYAWmo96/jBza4q6XsFixfe8uyg2N0xY Chy7YBf2YqjhrXExfnqWv/sRnMFT4qhCa+KrWjso= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Herbert Xu , Thorsten Blum , Giovanni Cabiddu , Sasha Levin Subject: [PATCH 6.6 174/175] crypto: qat - Return pointer directly in adf_ctl_alloc_resources Date: Thu, 2 Jul 2026 18:21:15 +0200 Message-ID: <20260702155119.448918862@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260702155115.766838875@linuxfoundation.org> References: <20260702155115.766838875@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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Herbert Xu [ Upstream commit 5ce9891ea928208a915411ce8227f8c3e37e5ad9 ] Returning values through arguments is confusing and that has upset the compiler with the recent change to memdup_user: ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c: In function ‘adf_ctl_ioctl’: ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c:308:26: warning: ‘ctl_data’ may be used uninitialized [-Wmaybe-uninitialized] 308 | ctl_data->device_id); | ^~ ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c:294:39: note: ‘ctl_data’ was declared here 294 | struct adf_user_cfg_ctl_data *ctl_data; | ^~~~~~~~ In function ‘adf_ctl_ioctl_dev_stop’, inlined from ‘adf_ctl_ioctl’ at ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c:386:9: ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c:273:48: warning: ‘ctl_data’ may be used uninitialized [-Wmaybe-uninitialized] 273 | ret = adf_ctl_is_device_in_use(ctl_data->device_id); | ~~~~~~~~^~~~~~~~~~~ ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c: In function ‘adf_ctl_ioctl’: ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c:261:39: note: ‘ctl_data’ was declared here 261 | struct adf_user_cfg_ctl_data *ctl_data; | ^~~~~~~~ In function ‘adf_ctl_ioctl_dev_config’, inlined from ‘adf_ctl_ioctl’ at ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c:382:9: ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c:192:54: warning: ‘ctl_data’ may be used uninitialized [-Wmaybe-uninitialized] 192 | accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id); | ~~~~~~~~^~~~~~~~~~~ ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c: In function ‘adf_ctl_ioctl’: ../drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c:185:39: note: ‘ctl_data’ was declared here 185 | struct adf_user_cfg_ctl_data *ctl_data; | ^~~~~~~~ Fix this by returning the pointer directly. Signed-off-by: Herbert Xu Reviewed-by: Thorsten Blum Acked-by: Giovanni Cabiddu Signed-off-by: Herbert Xu Stable-dep-of: d237230728c5 ("crypto: qat - remove unused character device and IOCTLs") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c | 31 +++++++++------------- 1 file changed, 13 insertions(+), 18 deletions(-) --- a/drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c +++ b/drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c @@ -86,19 +86,14 @@ err_chrdev_unreg: return -EFAULT; } -static int adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data **ctl_data, - unsigned long arg) +static struct adf_user_cfg_ctl_data *adf_ctl_alloc_resources(unsigned long arg) { struct adf_user_cfg_ctl_data *cfg_data; cfg_data = memdup_user((void __user *)arg, sizeof(*cfg_data)); - if (IS_ERR(cfg_data)) { + if (IS_ERR(cfg_data)) pr_err("QAT: failed to copy from user cfg_data.\n"); - return PTR_ERR(cfg_data); - } - - *ctl_data = cfg_data; - return 0; + return cfg_data; } static int adf_add_key_value_data(struct adf_accel_dev *accel_dev, @@ -178,13 +173,13 @@ out_err: static int adf_ctl_ioctl_dev_config(struct file *fp, unsigned int cmd, unsigned long arg) { - int ret; struct adf_user_cfg_ctl_data *ctl_data; struct adf_accel_dev *accel_dev; + int ret = 0; - ret = adf_ctl_alloc_resources(&ctl_data, arg); - if (ret) - return ret; + ctl_data = adf_ctl_alloc_resources(arg); + if (IS_ERR(ctl_data)) + return PTR_ERR(ctl_data); accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id); if (!accel_dev) { @@ -257,9 +252,9 @@ static int adf_ctl_ioctl_dev_stop(struct int ret; struct adf_user_cfg_ctl_data *ctl_data; - ret = adf_ctl_alloc_resources(&ctl_data, arg); - if (ret) - return ret; + ctl_data = adf_ctl_alloc_resources(arg); + if (IS_ERR(ctl_data)) + return PTR_ERR(ctl_data); if (adf_devmgr_verify_id(ctl_data->device_id)) { pr_err("QAT: Device %d not found\n", ctl_data->device_id); @@ -291,9 +286,9 @@ static int adf_ctl_ioctl_dev_start(struc struct adf_user_cfg_ctl_data *ctl_data; struct adf_accel_dev *accel_dev; - ret = adf_ctl_alloc_resources(&ctl_data, arg); - if (ret) - return ret; + ctl_data = adf_ctl_alloc_resources(arg); + if (IS_ERR(ctl_data)) + return PTR_ERR(ctl_data); ret = -ENODEV; accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);