amd-xgbe: Fix debugfs compatibility change with kstrtouint

The initial change from sscanf to kstrtouint broke backward
compatbility by using a base of "0" in the kstrtouint call.
This allowed for entering decimal, hexadecimal or octal as
input where previously the sscanf always interpreted the input
as hexadecimal.  Additionally, -EIO was returned on error prior
to this change and now it is whatever the error value that is
returned by kstrtouint.

Change the base value of the kstrtouint from 0 to 16 and return
-EIO on error.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c b/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c
index 8119858..346592d 100644 (file)
--- a/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c
@@ -165,9 +165,9 @@ static ssize_t xgbe_common_write(const char __user *buffer, size_t count,
                return len;
 
        workarea[len] = '\0';
-       ret = kstrtouint(workarea, 0, value);
+       ret = kstrtouint(workarea, 16, value);
        if (ret)
-               return ret;
+               return -EIO;
 
        return len;
 }