diff options
Diffstat (limited to 'drivers/input/input-compat.c')
| -rw-r--r-- | drivers/input/input-compat.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/drivers/input/input-compat.c b/drivers/input/input-compat.c index fda8d6d2a268..a5043193ead8 100644 --- a/drivers/input/input-compat.c +++ b/drivers/input/input-compat.c @@ -1,14 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * 32bit compatibility wrappers for the input subsystem. * * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. */ #include <linux/export.h> +#include <linux/sprintf.h> #include <linux/uaccess.h> #include "input-compat.h" @@ -97,6 +95,28 @@ int input_ff_effect_from_user(const char __user *buffer, size_t size, return 0; } +int input_bits_to_string(char *buf, int buf_size, unsigned long bits, + bool skip_empty) +{ + int len = 0; + + if (in_compat_syscall()) { + u32 dword = bits >> 32; + if (dword || !skip_empty) + len += snprintf(buf, buf_size, "%x ", dword); + + dword = bits & 0xffffffffUL; + if (dword || !skip_empty || len) + len += snprintf(buf + len, max(buf_size - len, 0), + "%x", dword); + } else { + if (bits || !skip_empty) + len += snprintf(buf, buf_size, "%lx", bits); + } + + return len; +} + #else int input_event_from_user(const char __user *buffer, @@ -129,6 +149,13 @@ int input_ff_effect_from_user(const char __user *buffer, size_t size, return 0; } +int input_bits_to_string(char *buf, int buf_size, unsigned long bits, + bool skip_empty) +{ + return bits || !skip_empty ? + snprintf(buf, buf_size, "%lx", bits) : 0; +} + #endif /* CONFIG_COMPAT */ EXPORT_SYMBOL_GPL(input_event_from_user); |