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-rw-r--r--drivers/misc/thinkpad_acpi.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 8c9430775285..ab23a3221585 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -4817,9 +4817,15 @@ static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4817 unsigned int i; 4817 unsigned int i;
4818 struct ibm_struct *ibm; 4818 struct ibm_struct *ibm;
4819 4819
4820 if (!kp || !kp->name || !val)
4821 return -EINVAL;
4822
4820 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 4823 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4821 ibm = ibms_init[i].data; 4824 ibm = ibms_init[i].data;
4822 BUG_ON(ibm == NULL); 4825 WARN_ON(ibm == NULL);
4826
4827 if (!ibm || !ibm->name)
4828 continue;
4823 4829
4824 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 4830 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4825 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 4831 if (strlen(val) > sizeof(ibms_init[i].param) - 2)