Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <linux/export.h>
4#include <linux/limits.h>
5#include <linux/minmax.h>
6#include <linux/module.h>
7
8#include <drm/drm_print.h>
9
10#include "drm_sysfb_helper.h"
11
12int drm_sysfb_get_validated_int(struct drm_device *dev, const char *name,
13 u64 value, u32 max)
14{
15 if (value > min(max, INT_MAX)) {
16 drm_warn(dev, "%s of %llu exceeds maximum of %u\n", name, value, max);
17 return -EINVAL;
18 }
19 return value;
20}
21EXPORT_SYMBOL(drm_sysfb_get_validated_int);
22
23int drm_sysfb_get_validated_int0(struct drm_device *dev, const char *name,
24 u64 value, u32 max)
25{
26 if (!value) {
27 drm_warn(dev, "%s of 0 not allowed\n", name);
28 return -EINVAL;
29 }
30 return drm_sysfb_get_validated_int(dev, name, value, max);
31}
32EXPORT_SYMBOL(drm_sysfb_get_validated_int0);
33
34MODULE_DESCRIPTION("Helpers for DRM sysfb drivers");
35MODULE_LICENSE("GPL");