[S390] cmm, smsgiucv_app: convert sender to uppercase

The sender kernel parameter contains a z/VM user ID where
alphabetic characters must be specified in uppercase.

Allow users to specify lowercase characters and convert the
sender string to uppercase at module initialization.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c
index 4bddf8d3a150..a9550dca3e4b 100644
--- a/arch/s390/mm/cmm.c
+++ b/arch/s390/mm/cmm.c
@@ -435,6 +435,13 @@ static int __init cmm_init(void)
         if (!cmm_sysctl_header)
                 goto out_sysctl;
 #ifdef CONFIG_CMM_IUCV
+        /* convert sender to uppercase characters */
+        if (sender) {
+                int len = strlen(sender);
+                while (len--)
+                        sender[len] = toupper(sender[len]);
+        }
+
         rc = smsg_register_callback(SMSG_PREFIX, cmm_smsg_target);
         if (rc < 0)
                 goto out_smsg;