[patch 06/38] cio: observe chpid valid flag

Martin Schwidefsky
2007-04-27T14:15:53Z

[-- Attachment #1: 104-cio-chpid-valid.diff --]
[-- Type: text/plain, Size: 1051 bytes --]

From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>

Check validity flag of CHPID description data before continuing with
channel-path initialization.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

drivers/s390/cio/chp.c | 4 ++++
1 files changed, 4 insertions(+)

Index: quilt-2.6/drivers/s390/cio/chp.c
===================================================================
--- quilt-2.6.orig/drivers/s390/cio/chp.c 2007-04-27 16:04:53.000000000 +0200
+++ quilt-2.6/drivers/s390/cio/chp.c 2007-04-27 16:04:53.000000000 +0200
@@ -339,6 +339,10 @@
ret = chsc_determine_channel_path_description(chpid, &chp->desc);
if (ret)
goto out_free;
+ if ((chp->desc.flags & 0x80) == 0) {
+ ret = -ENODEV;
+ goto out_free;
+ }
/* Get channel-measurement characteristics. */
if (css_characteristics_avail && css_chsc_characteristics.scmc
&& css_chsc_characteristics.secm) {