From patchwork Sat Oct 22 21:36:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 617621 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1E6BFA3741 for ; Sat, 22 Oct 2022 21:37:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229947AbiJVVhP (ORCPT ); Sat, 22 Oct 2022 17:37:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229958AbiJVVhN (ORCPT ); Sat, 22 Oct 2022 17:37:13 -0400 Received: from mo4-p02-ob.smtp.rzone.de (mo4-p02-ob.smtp.rzone.de [85.215.255.83]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C5B1FA037; Sat, 22 Oct 2022 14:37:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1666474619; s=strato-dkim-0002; d=iokpp.de; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Cc:Date: From:Subject:Sender; bh=eWlJe8HaDj7UMQMSuvru7CEn5kVh7Q+O8gFfZxYR4ss=; b=TuKubelJ4OzH/d4vDhimN6wQrEiX72oPO+ZD24Mg0nSoxjbt7ZXGVrpIxZqy0vwpyE YpECa9AW6syS8j7WevAN15ck6usowCi7yvSPw6oWCKvmrgXxLu5Ur58Ns/EfrmkTqx8U 0NCZLV9SOEkRRHjw9HGKS6+filLYDy9F6zc2fhJczyeuocgn6pXLK6ZPW+ntBOwIi3j+ Z8ue8K2p8HZ03rL/8Zv3fw0usGM6WkteG4wQWVhkR/FafZ+MksdjYUo7SNJOvzLrBjJ8 s75F794WJ+tBVVhtxhGBA5LiNfO5mBlOhr92ZwThTI+u0zdS6JNBR/h7VODU6T1UzLaS 6Rmg== Authentication-Results: strato.com; dkim=none X-RZG-AUTH: ":LmkFe0i9dN8c2t4QQyGBB/NDXvjDB6pBSedrgBzPc9DUyubU4DD/R51xABQjgP5pGGXp2Dw=" X-RZG-CLASS-ID: mo01 Received: from linux.. by smtp.strato.de (RZmta 48.2.0 DYNA|AUTH) with ESMTPSA id zad98cy9MLaxnUT (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Sat, 22 Oct 2022 23:36:59 +0200 (CEST) From: Bean Huo To: alim.akhtar@samsung.com, avri.altman@wdc.com, asutoshd@codeaurora.org, jejb@linux.ibm.com, martin.petersen@oracle.com, stanley.chu@mediatek.com, beanhuo@micron.com, bvanassche@acm.org, tomas.winkler@intel.com, cang@codeaurora.org, daejun7.park@samsung.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Jaegeuk Kim Subject: [PATCH v4 1/3] scsi: ufs: core: Revert "WB is only available on LUN #0 to #7" Date: Sat, 22 Oct 2022 23:36:48 +0200 Message-Id: <20221022213650.626766-2-beanhuo@iokpp.de> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221022213650.626766-1-beanhuo@iokpp.de> References: <20221022213650.626766-1-beanhuo@iokpp.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo One newer 'commit d3d9c4570285 ("scsi: ufs: Fix memory corruption by ufshcd_read_desc_param()")' has properly fixed stack overflow issue, 'commit a2fca52ee640 ("scsi: ufs: WB is only available on LUN #0 to #7")' is no longer required, we can revert it now. Cc: Jaegeuk Kim Signed-off-by: Bean Huo Reviewed-by: Arthur Simchaev Reviewed-by: Bart Van Assche --- drivers/ufs/core/ufs-sysfs.c | 3 +-- drivers/ufs/core/ufshcd-priv.h | 6 +----- drivers/ufs/core/ufshcd.c | 2 +- 3 files changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c index 53aea56d1de1..eb6b278c4e79 100644 --- a/drivers/ufs/core/ufs-sysfs.c +++ b/drivers/ufs/core/ufs-sysfs.c @@ -1234,8 +1234,7 @@ static ssize_t _pname##_show(struct device *dev, \ struct scsi_device *sdev = to_scsi_device(dev); \ struct ufs_hba *hba = shost_priv(sdev->host); \ u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun); \ - if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun, \ - _duname##_DESC_PARAM##_puname)) \ + if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun)) \ return -EINVAL; \ return ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_##_duname, \ lun, _duname##_DESC_PARAM##_puname, buf, _size); \ diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h index f68ca33f6ac7..a9e8e1f5afe7 100644 --- a/drivers/ufs/core/ufshcd-priv.h +++ b/drivers/ufs/core/ufshcd-priv.h @@ -293,16 +293,12 @@ static inline int ufshcd_rpm_put(struct ufs_hba *hba) * @lun: LU number to check * @return: true if the lun has a matching unit descriptor, false otherwise */ -static inline bool ufs_is_valid_unit_desc_lun(struct ufs_dev_info *dev_info, - u8 lun, u8 param_offset) +static inline bool ufs_is_valid_unit_desc_lun(struct ufs_dev_info *dev_info, u8 lun) { if (!dev_info || !dev_info->max_lu_supported) { pr_err("Max General LU supported by UFS isn't initialized\n"); return false; } - /* WB is available only for the logical unit from 0 to 7 */ - if (param_offset == UNIT_DESC_PARAM_WB_BUF_ALLOC_UNITS) - return lun < UFS_UPIU_MAX_WB_LUN_ID; return lun == UFS_UPIU_RPMB_WLUN || (lun < dev_info->max_lu_supported); } diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index c8f0fe740005..8cdba9a54870 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -3606,7 +3606,7 @@ static inline int ufshcd_read_unit_desc_param(struct ufs_hba *hba, * Unit descriptors are only available for general purpose LUs (LUN id * from 0 to 7) and RPMB Well known LU. */ - if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun, param_offset)) + if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun)) return -EOPNOTSUPP; return ufshcd_read_desc_param(hba, QUERY_DESC_IDN_UNIT, lun, From patchwork Sat Oct 22 21:36:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 617798 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70BD2FA373F for ; Sat, 22 Oct 2022 21:37:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229921AbiJVVhK (ORCPT ); Sat, 22 Oct 2022 17:37:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43402 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229933AbiJVVhJ (ORCPT ); Sat, 22 Oct 2022 17:37:09 -0400 Received: from mo4-p02-ob.smtp.rzone.de (mo4-p02-ob.smtp.rzone.de [85.215.255.83]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A786FA01F; Sat, 22 Oct 2022 14:37:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1666474620; s=strato-dkim-0002; d=iokpp.de; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Cc:Date: From:Subject:Sender; bh=hLVzOoSM0EISo0/xnWn5hNOztH7rYQQdOf8SYTOMMCg=; b=cRqSMDbVi6zrduwA/qWOozpv8F/85yoQ52ORIbbrCITcgbRAMER6r/LiGm/lCrSHeQ umjMhzBp4D4GcEOtJEZVF/HI0DX7SzZybWUE/FHKrZvZVGXnCMYe+Y7nJiI1khQURHrg 4CHafbBd2TP1jiwA5nz5Era2nJbXqjuzNnlOAR5QaIe4TP8PhS5a/DwYXWM/AtHF5FnP TzY3Qj+I074PBHYOh1/+/vhxbX1+h1MQKRaZoMty3fIK4a7MygCKG/Y5LcQ5MoVov5cN mS2o1qut97vdiYSyWNAcoVm5ZmKooa0pSvnzyho+Vx0gg+hBUm0a6ucGyzviqfgfFT3G hg0w== Authentication-Results: strato.com; dkim=none X-RZG-AUTH: ":LmkFe0i9dN8c2t4QQyGBB/NDXvjDB6pBSedrgBzPc9DUyubU4DD/R51xABQjgP5pGGXp2Dw=" X-RZG-CLASS-ID: mo02 Received: from linux.. by smtp.strato.de (RZmta 48.2.0 DYNA|AUTH) with ESMTPSA id zad98cy9MLaxnUU (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Sat, 22 Oct 2022 23:36:59 +0200 (CEST) From: Bean Huo To: alim.akhtar@samsung.com, avri.altman@wdc.com, asutoshd@codeaurora.org, jejb@linux.ibm.com, martin.petersen@oracle.com, stanley.chu@mediatek.com, beanhuo@micron.com, bvanassche@acm.org, tomas.winkler@intel.com, cang@codeaurora.org, daejun7.park@samsung.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 2/3] scsi: ufs: core: Cleanup ufshcd_slave_alloc() Date: Sat, 22 Oct 2022 23:36:49 +0200 Message-Id: <20221022213650.626766-3-beanhuo@iokpp.de> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221022213650.626766-1-beanhuo@iokpp.de> References: <20221022213650.626766-1-beanhuo@iokpp.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo Combine ufshcd_get_lu_power_on_wp_status() and ufshcd_set_queue_depth() into one single ufshcd_lu_init(), so that we only need to read the LUN descriptor once. Signed-off-by: Bean Huo Reviewed-by: Bart Van Assche --- drivers/ufs/core/ufshcd.c | 150 ++++++++++++++------------------------ 1 file changed, 53 insertions(+), 97 deletions(-) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 8cdba9a54870..8599780022fb 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -4859,100 +4859,6 @@ static int ufshcd_verify_dev_init(struct ufs_hba *hba) return err; } -/** - * ufshcd_set_queue_depth - set lun queue depth - * @sdev: pointer to SCSI device - * - * Read bLUQueueDepth value and activate scsi tagged command - * queueing. For WLUN, queue depth is set to 1. For best-effort - * cases (bLUQueueDepth = 0) the queue depth is set to a maximum - * value that host can queue. - */ -static void ufshcd_set_queue_depth(struct scsi_device *sdev) -{ - int ret = 0; - u8 lun_qdepth; - struct ufs_hba *hba; - - hba = shost_priv(sdev->host); - - lun_qdepth = hba->nutrs; - ret = ufshcd_read_unit_desc_param(hba, - ufshcd_scsi_to_upiu_lun(sdev->lun), - UNIT_DESC_PARAM_LU_Q_DEPTH, - &lun_qdepth, - sizeof(lun_qdepth)); - - /* Some WLUN doesn't support unit descriptor */ - if (ret == -EOPNOTSUPP) - lun_qdepth = 1; - else if (!lun_qdepth) - /* eventually, we can figure out the real queue depth */ - lun_qdepth = hba->nutrs; - else - lun_qdepth = min_t(int, lun_qdepth, hba->nutrs); - - dev_dbg(hba->dev, "%s: activate tcq with queue depth %d\n", - __func__, lun_qdepth); - scsi_change_queue_depth(sdev, lun_qdepth); -} - -/* - * ufshcd_get_lu_wp - returns the "b_lu_write_protect" from UNIT DESCRIPTOR - * @hba: per-adapter instance - * @lun: UFS device lun id - * @b_lu_write_protect: pointer to buffer to hold the LU's write protect info - * - * Returns 0 in case of success and b_lu_write_protect status would be returned - * @b_lu_write_protect parameter. - * Returns -ENOTSUPP if reading b_lu_write_protect is not supported. - * Returns -EINVAL in case of invalid parameters passed to this function. - */ -static int ufshcd_get_lu_wp(struct ufs_hba *hba, - u8 lun, - u8 *b_lu_write_protect) -{ - int ret; - - if (!b_lu_write_protect) - ret = -EINVAL; - /* - * According to UFS device spec, RPMB LU can't be write - * protected so skip reading bLUWriteProtect parameter for - * it. For other W-LUs, UNIT DESCRIPTOR is not available. - */ - else if (lun >= hba->dev_info.max_lu_supported) - ret = -ENOTSUPP; - else - ret = ufshcd_read_unit_desc_param(hba, - lun, - UNIT_DESC_PARAM_LU_WR_PROTECT, - b_lu_write_protect, - sizeof(*b_lu_write_protect)); - return ret; -} - -/** - * ufshcd_get_lu_power_on_wp_status - get LU's power on write protect - * status - * @hba: per-adapter instance - * @sdev: pointer to SCSI device - * - */ -static inline void ufshcd_get_lu_power_on_wp_status(struct ufs_hba *hba, - const struct scsi_device *sdev) -{ - if (hba->dev_info.f_power_on_wp_en && - !hba->dev_info.is_lu_power_on_wp) { - u8 b_lu_write_protect; - - if (!ufshcd_get_lu_wp(hba, ufshcd_scsi_to_upiu_lun(sdev->lun), - &b_lu_write_protect) && - (b_lu_write_protect == UFS_LU_POWER_ON_WP)) - hba->dev_info.is_lu_power_on_wp = true; - } -} - /** * ufshcd_setup_links - associate link b/w device wlun and other luns * @sdev: pointer to SCSI device @@ -4990,6 +4896,58 @@ static void ufshcd_setup_links(struct ufs_hba *hba, struct scsi_device *sdev) } } +/** + * ufshcd_lu_init - Initialize the relevant parameters of the LU + * @hba: per-adapter instance + * @sdev: pointer to SCSI device + */ +static void ufshcd_lu_init(struct ufs_hba *hba, struct scsi_device *sdev) +{ + int len = hba->desc_size[QUERY_DESC_IDN_UNIT]; + u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun); + u8 lun_qdepth = hba->nutrs; + u8 *desc_buf; + int ret; + + desc_buf = kzalloc(len, GFP_KERNEL); + if (!desc_buf) + goto set_qdepth; + + ret = ufshcd_read_unit_desc_param(hba, lun, 0, desc_buf, len); + if (ret < 0) { + if (ret == -EOPNOTSUPP) + /* If LU doesn't support unit descriptor, its queue depth is set to 1 */ + lun_qdepth = 1; + kfree(desc_buf); + goto set_qdepth; + } + + if (desc_buf[UNIT_DESC_PARAM_LU_Q_DEPTH]) { + /* + * In per-LU queueing architecture, bLUQueueDepth will not be 0, then we will + * use the smaller between UFSHCI CAP.NUTRS and UFS LU bLUQueueDepth + */ + lun_qdepth = min_t(int, desc_buf[UNIT_DESC_PARAM_LU_Q_DEPTH], hba->nutrs); + } + /* + * According to UFS device specification, the write protection mode is only supported by + * normal LU, not supported by WLUN. + */ + if (hba->dev_info.f_power_on_wp_en && lun < hba->dev_info.max_lu_supported && + !hba->dev_info.is_lu_power_on_wp && + desc_buf[UNIT_DESC_PARAM_LU_WR_PROTECT] == UFS_LU_POWER_ON_WP) + hba->dev_info.is_lu_power_on_wp = true; + + kfree(desc_buf); +set_qdepth: + /* + * For WLUNs that don't support unit descriptor, queue depth is set to 1. For LUs whose + * bLUQueueDepth == 0, the queue depth is set to a maximum value that host can queue. + */ + dev_dbg(hba->dev, "Set LU %x queue depth %d\n", lun, lun_qdepth); + scsi_change_queue_depth(sdev, lun_qdepth); +} + /** * ufshcd_slave_alloc - handle initial SCSI device configurations * @sdev: pointer to SCSI device @@ -5017,9 +4975,7 @@ static int ufshcd_slave_alloc(struct scsi_device *sdev) /* WRITE_SAME command is not supported */ sdev->no_write_same = 1; - ufshcd_set_queue_depth(sdev); - - ufshcd_get_lu_power_on_wp_status(hba, sdev); + ufshcd_lu_init(hba, sdev); ufshcd_setup_links(hba, sdev); From patchwork Sat Oct 22 21:36:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 617799 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F72FC04A95 for ; Sat, 22 Oct 2022 21:37:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229939AbiJVVhJ (ORCPT ); Sat, 22 Oct 2022 17:37:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229921AbiJVVhI (ORCPT ); Sat, 22 Oct 2022 17:37:08 -0400 Received: from mo4-p02-ob.smtp.rzone.de (mo4-p02-ob.smtp.rzone.de [85.215.255.81]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A7F6FA020; Sat, 22 Oct 2022 14:37:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1666474620; s=strato-dkim-0002; d=iokpp.de; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Cc:Date: From:Subject:Sender; bh=d0/HieIBh0r5Mr2qWbDo21B/n0XfJBUvPVCy24zUI7k=; b=aKq4NskIMmb1g3JLYFpHG9OPBzBVsj7vVyigeDAj1kMj+Sra3jc2J9dMQi3U6tZGRX VqsEP6R2l5sEOcKt0rg18OOgSK6j9L1G4HlfwxvXs+TXOZ8OSlbXj+E62rjj5wHcvTte e91fgYXufN16ypBHu8JF0ABBa964DLj2vZ81rHQFC6dsS7/RfnX/rvX89WnbY3WZYvvu KsAqu3dZvbwfOFeaVRWEd/SwuAPWhLRBrOlrM1hc79HNofevelC0kfIZX7zltsAAPex1 LLIyqAJur7wRRN0z0fppXhpf4O92MjgNzUPw8t8/Z+HtJpsZa3ri+LlhJUFfsztRW17I keSQ== Authentication-Results: strato.com; dkim=none X-RZG-AUTH: ":LmkFe0i9dN8c2t4QQyGBB/NDXvjDB6pBSedrgBzPc9DUyubU4DD/R51xABQjgP5pGGXp2Dw=" X-RZG-CLASS-ID: mo02 Received: from linux.. by smtp.strato.de (RZmta 48.2.0 DYNA|AUTH) with ESMTPSA id zad98cy9MLb0nUV (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Sat, 22 Oct 2022 23:37:00 +0200 (CEST) From: Bean Huo To: alim.akhtar@samsung.com, avri.altman@wdc.com, asutoshd@codeaurora.org, jejb@linux.ibm.com, martin.petersen@oracle.com, stanley.chu@mediatek.com, beanhuo@micron.com, bvanassche@acm.org, tomas.winkler@intel.com, cang@codeaurora.org, daejun7.park@samsung.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 3/3] scsi: ufs: core: Use is_visible to control UFS unit descriptor sysfs nodes Date: Sat, 22 Oct 2022 23:36:50 +0200 Message-Id: <20221022213650.626766-4-beanhuo@iokpp.de> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221022213650.626766-1-beanhuo@iokpp.de> References: <20221022213650.626766-1-beanhuo@iokpp.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo UFS Boot and Device W-LUs do not have unit descriptors, and RPMB does not support WB, we can use is_visible() to control which nodes are visible and which are not. Reviewed-by: Bart Van Assche Signed-off-by: Bean Huo Reviewed-by: Arthur Simchaev --- drivers/ufs/core/ufs-sysfs.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c index eb6b278c4e79..883f0e44b54e 100644 --- a/drivers/ufs/core/ufs-sysfs.c +++ b/drivers/ufs/core/ufs-sysfs.c @@ -1285,9 +1285,27 @@ static struct attribute *ufs_sysfs_unit_descriptor[] = { NULL, }; +static umode_t ufs_unit_descriptor_is_visible(struct kobject *kobj, struct attribute *attr, int n) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct scsi_device *sdev = to_scsi_device(dev); + u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun); + umode_t mode = attr->mode; + + if (lun == UFS_UPIU_BOOT_WLUN || lun == UFS_UPIU_UFS_DEVICE_WLUN) + /* Boot and device WLUN have no unit descriptors */ + mode = 0; + if (lun == UFS_UPIU_RPMB_WLUN && attr == &dev_attr_wb_buf_alloc_units.attr) + mode = 0; + + return mode; +} + + const struct attribute_group ufs_sysfs_unit_descriptor_group = { .name = "unit_descriptor", .attrs = ufs_sysfs_unit_descriptor, + .is_visible = ufs_unit_descriptor_is_visible, }; static ssize_t dyn_cap_needed_attribute_show(struct device *dev,