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

[Martin Schwidefsky <schwidefsky@de.ibm.com>]

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) {

-- 
blue skies,
   Martin.

"Reality continues to ruin my life." - Calvin.

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