add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/hid/hid-picolcd_fb.c
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@@ -1,20 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /***************************************************************************
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  *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
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  *                                                                         *
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  *   Based on Logitech G13 driver (v0.4)                                   *
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  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
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  *                                                                         *
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- *   This program is free software: you can redistribute it and/or modify  *
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- *   it under the terms of the GNU General Public License as published by  *
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- *   the Free Software Foundation, version 2 of the License.               *
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- *                                                                         *
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- *   This driver is distributed in the hope that it will be useful, but    *
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- *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
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- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
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- *   General Public License for more details.                              *
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- *                                                                         *
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- *   You should have received a copy of the GNU General Public License     *
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- *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
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  ***************************************************************************/
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 #include <linux/hid.h>
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@@ -427,8 +417,7 @@
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 	return 0;
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 }
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-/* Note this can't be const because of struct fb_info definition */
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-static struct fb_ops picolcdfb_ops = {
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+static const struct fb_ops picolcdfb_ops = {
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 	.owner        = THIS_MODULE,
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 	.fb_destroy   = picolcd_fb_destroy,
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 	.fb_read      = fb_sys_read,
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@@ -469,9 +458,9 @@
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 		if (ret >= PAGE_SIZE)
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 			break;
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 		else if (i == fb_update_rate)
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-			ret += snprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i);
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+			ret += scnprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i);
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 		else
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-			ret += snprintf(buf+ret, PAGE_SIZE-ret, "%u ", i);
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+			ret += scnprintf(buf+ret, PAGE_SIZE-ret, "%u ", i);
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 	if (ret > 0)
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 		buf[min(ret, (size_t)PAGE_SIZE)-1] = '\n';
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 	return ret;
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@@ -522,10 +511,8 @@
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 			sizeof(struct fb_deferred_io) +
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 			sizeof(struct picolcd_fb_data) +
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 			PICOLCDFB_SIZE, dev);
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-	if (info == NULL) {
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-		dev_err(dev, "failed to allocate a framebuffer\n");
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+	if (!info)
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 		goto err_nomem;
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-	}
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 	info->fbdefio = info->par;
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 	*info->fbdefio = picolcd_fb_defio;