ACPI: thinkpad-acpi: skip blanks before the data when parsing sysfs

Skip blanks not just at the tail of sysfs writes, but also at the head.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 81693b4c23b8..37891a8c030a 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -709,6 +709,8 @@ static int parse_strtoul(const char *buf,
 {
         char *endp;
 
+        while (*buf && isspace(*buf))
+                buf++;
         *value = simple_strtoul(buf, &endp, 0);
         while (*endp && isspace(*endp))
                 endp++;