From patchwork Mon Dec 5 08:16:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ye.xingchen@zte.com.cn X-Patchwork-Id: 13064250 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 19821C4321E for ; Mon, 5 Dec 2022 08:17:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231992AbiLEIRF (ORCPT ); Mon, 5 Dec 2022 03:17:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231959AbiLEIQ7 (ORCPT ); Mon, 5 Dec 2022 03:16:59 -0500 Received: from mxhk.zte.com.cn (mxhk.zte.com.cn [63.216.63.40]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1A3DBC06; Mon, 5 Dec 2022 00:16:56 -0800 (PST) Received: from mse-fl2.zte.com.cn (unknown [10.5.228.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mxhk.zte.com.cn (FangMail) with ESMTPS id 4NQbxM1jhJz8RV7G; Mon, 5 Dec 2022 16:16:55 +0800 (CST) Received: from xaxapp01.zte.com.cn ([10.88.40.50]) by mse-fl2.zte.com.cn with SMTP id 2B58Gf6p028925; Mon, 5 Dec 2022 16:16:41 +0800 (+08) (envelope-from ye.xingchen@zte.com.cn) Received: from mapi (xaxapp01[null]) by mapi (Zmail) with MAPI id mid31; Mon, 5 Dec 2022 16:16:43 +0800 (CST) Date: Mon, 5 Dec 2022 16:16:43 +0800 (CST) X-Zmail-TransId: 2af9638da8eb41c9fedb X-Mailer: Zmail v1.0 Message-ID: <202212051616434207425@zte.com.cn> Mime-Version: 1.0 From: To: Cc: , , , , , Subject: =?utf-8?q?=5BPATCH_linux-next_v2=5D_fbdev=3A_use_sysfs=5Femit=28=29?= =?utf-8?q?_to_instead_of_scnprintf=28=29?= X-MAIL: mse-fl2.zte.com.cn 2B58Gf6p028925 X-Fangmail-Gw-Spam-Type: 0 X-FangMail-Miltered: at cgslv5.04-192.168.250.137.novalocal with ID 638DA8F7.000 by FangMail milter! X-FangMail-Envelope: 1670228215/4NQbxM1jhJz8RV7G/638DA8F7.000/10.5.228.133/[10.5.228.133]/mse-fl2.zte.com.cn/ X-Fangmail-Anti-Spam-Filtered: true X-Fangmail-MID-QID: 638DA8F7.000/4NQbxM1jhJz8RV7G Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org From: ye xingchen Follow the advice of the Documentation/filesystems/sysfs.rst and show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. Signed-off-by: ye xingchen --- v1 -> v2 Add another patch about this in ./video/fbdev/ drivers/video/fbdev/sh_mobile_lcdcfb.c | 8 ++++---- drivers/video/fbdev/uvesafb.c | 10 +++++----- 2 files changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c index 6d00893d41f4..ad9323ed8e2e 100644 --- a/drivers/video/fbdev/sh_mobile_lcdcfb.c +++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c @@ -1188,7 +1188,7 @@ overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf) struct fb_info *info = dev_get_drvdata(dev); struct sh_mobile_lcdc_overlay *ovl = info->par; - return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha); + return sysfs_emit(buf, "%u\n", ovl->alpha); } static ssize_t @@ -1226,7 +1226,7 @@ overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf) struct fb_info *info = dev_get_drvdata(dev); struct sh_mobile_lcdc_overlay *ovl = info->par; - return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode); + return sysfs_emit(buf, "%u\n", ovl->mode); } static ssize_t @@ -1265,7 +1265,7 @@ overlay_position_show(struct device *dev, struct device_attribute *attr, struct fb_info *info = dev_get_drvdata(dev); struct sh_mobile_lcdc_overlay *ovl = info->par; - return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y); + return sysfs_emit(buf, "%d,%d\n", ovl->pos_x, ovl->pos_y); } static ssize_t @@ -1306,7 +1306,7 @@ overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf) struct fb_info *info = dev_get_drvdata(dev); struct sh_mobile_lcdc_overlay *ovl = info->par; - return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3); + return sysfs_emit(buf, "%u\n", ovl->rop3); } static ssize_t diff --git a/drivers/video/fbdev/uvesafb.c b/drivers/video/fbdev/uvesafb.c index 00d789b6c0fa..ba8028a0cc7a 100644 --- a/drivers/video/fbdev/uvesafb.c +++ b/drivers/video/fbdev/uvesafb.c @@ -1580,7 +1580,7 @@ static ssize_t uvesafb_show_vendor(struct device *dev, struct uvesafb_par *par = info->par; if (par->vbe_ib.oem_vendor_name_ptr) - return scnprintf(buf, PAGE_SIZE, "%s\n", (char *) + return sysfs_emit(buf, "%s\n", (char *) (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr); else return 0; @@ -1595,7 +1595,7 @@ static ssize_t uvesafb_show_product_name(struct device *dev, struct uvesafb_par *par = info->par; if (par->vbe_ib.oem_product_name_ptr) - return scnprintf(buf, PAGE_SIZE, "%s\n", (char *) + return sysfs_emit(buf, "%s\n", (char *) (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr); else return 0; @@ -1610,7 +1610,7 @@ static ssize_t uvesafb_show_product_rev(struct device *dev, struct uvesafb_par *par = info->par; if (par->vbe_ib.oem_product_rev_ptr) - return scnprintf(buf, PAGE_SIZE, "%s\n", (char *) + return sysfs_emit(buf, "%s\n", (char *) (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr); else return 0; @@ -1625,7 +1625,7 @@ static ssize_t uvesafb_show_oem_string(struct device *dev, struct uvesafb_par *par = info->par; if (par->vbe_ib.oem_string_ptr) - return scnprintf(buf, PAGE_SIZE, "%s\n", + return sysfs_emit(buf, "%s\n", (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr); else return 0; @@ -1639,7 +1639,7 @@ static ssize_t uvesafb_show_nocrtc(struct device *dev, struct fb_info *info = dev_get_drvdata(dev); struct uvesafb_par *par = info->par; - return scnprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc); + return sysfs_emit(buf, "%d\n", par->nocrtc); } static ssize_t uvesafb_store_nocrtc(struct device *dev,