author: Linus Torvalds <torvalds@linux-foundation.org> 2021-08-30 19:01:46 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2021-08-30 19:01:46 -0700
commit: 9a1d6c9e3f53732f2f48f4424e028642db616663
parent: 679369114e55f422dc593d0628cfde1d04ae59b3
Commit Summary:
Diffstat:
1 file changed, 17 insertions, 0 deletions
diff --git a/kernel/params.c b/kernel/params.c
index 2daa2780a92c..8299bd764e42 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -243,6 +243,24 @@ STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", kstrtoul);
STANDARD_PARAM_DEF(ullong, unsigned long long, "%llu", kstrtoull);
STANDARD_PARAM_DEF(hexint, unsigned int, "%#08x", kstrtouint);
+int param_set_uint_minmax(const char *val, const struct kernel_param *kp,
+ unsigned int min, unsigned int max)
+{
+ unsigned int num;
+ int ret;
+
+ if (!val)
+ return -EINVAL;
+ ret = kstrtouint(val, 0, &num);
+ if (ret)
+ return ret;
+ if (num < min || num > max)
+ return -EINVAL;
+ *((unsigned int *)kp->arg) = num;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(param_set_uint_minmax);
+
int param_set_charp(const char *val, const struct kernel_param *kp)
{
if (strlen(val) > 1024) {