From 15730ddbf745fbda9001b8bbd71977ac66bf5f41 Mon Sep 17 00:00:00 2001
From: Cornelia Huck <cornelia.huck@de.ibm.com>
Date: Mon, 6 Mar 2006 15:43:02 -0800
Subject: [PATCH] [PATCH] s390: improve response code handling in
chsc_enable_facility()
Rather than checking for some known failures, check positively for the
success response code 0x0001 and return -EIO for unrecognized failure
response codes.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Greg Smith <gsmith@nc.rr.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
drivers/s390/cio/chsc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 8cf9905d484..f4183d66025 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -1115,6 +1115,9 @@ chsc_enable_facility(int operation_code)
goto out;
}
switch (sda_area->response.code) {
+ case 0x0001: /* everything ok */
+ ret = 0;
+ break;
case 0x0003: /* invalid request block */
case 0x0007:
ret = -EINVAL;
@@ -1123,6 +1126,8 @@ chsc_enable_facility(int operation_code)
case 0x0101: /* facility not provided */
ret = -EOPNOTSUPP;
break;
+ default: /* something went wrong */
+ ret = -EIO;
}
out:
free_page((unsigned long)sda_area);
--
2.20.1