BIOS sets incorrect value (zero) when SET value passed for integer attribute
with + sign. Added workaround to remove + sign before passing input to BIOS
Co-developed-by: Mario Limonciello <mario.limonciello@xxxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxxx>
Co-developed-by: Prasanth KSR <prasanth.ksr@xxxxxxxx>
Signed-off-by: Prasanth KSR <prasanth.ksr@xxxxxxxx>
Signed-off-by: Divya Bharathi <divya.bharathi@xxxxxxxx>
---
drivers/platform/x86/dell-wmi-sysman/int-attributes.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/dell-wmi-sysman/int-attributes.c b/drivers/platform/x86/dell-wmi-sysman/int-attributes.c
index ea773d8e8d3a..75aedbb733be 100644
--- a/drivers/platform/x86/dell-wmi-sysman/int-attributes.c
+++ b/drivers/platform/x86/dell-wmi-sysman/int-attributes.c
@@ -39,7 +39,7 @@ static ssize_t current_value_show(struct kobject *kobj, struct kobj_attribute *a
* @instance_id: The instance on which input is validated
* @buf: Input value
*/
-static int validate_integer_input(int instance_id, const char *buf)
+static int validate_integer_input(int instance_id, char *buf)
{
int in_val;
int ret;
@@ -51,6 +51,12 @@ static int validate_integer_input(int instance_id, const char *buf)
in_val > wmi_priv.integer_data[instance_id].max_value)
return -EINVAL;
+ /* workaround for BIOS error.
+ * validate input to avoid setting 0 when integer input passed with + sign
+ */
+ if (*buf == '+')
+ memmove(buf, (buf + 1), strlen(buf + 1) + 1);
+
return ret;
}
--
2.25.1
