[patch 3/8] s390: Common I/O layer changes.

[Martin Schwidefsky]

[patch 3/8] s390: Common I/O layer changes.

From: Steffen Thoss <thoss@xxxxxxxxxx>

Common I/O layer changes:
 - Check if AIF is available on hardware before enabling
   the AIF time delay disablement facility.

Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>

diffstat:
 drivers/s390/cio/qdio.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff -urN linux-2.6/drivers/s390/cio/qdio.c linux-2.6-patched/drivers/s390/cio/qdio.c
--- linux-2.6/drivers/s390/cio/qdio.c	2005-01-14 19:44:49.000000000 +0100
+++ linux-2.6-patched/drivers/s390/cio/qdio.c	2005-01-14 19:45:17.000000000 +0100
@@ -56,7 +56,7 @@
 #include "ioasm.h"
 #include "chsc.h"
 
-#define VERSION_QDIO_C "$Revision: 1.94 $"
+#define VERSION_QDIO_C "$Revision: 1.98 $"
 
 /****************** MODULE PARAMETER VARIABLES ********************/
 MODULE_AUTHOR("Utz Bacher <utz.bacher@xxxxxxxxxx>");
@@ -2043,6 +2043,7 @@
 				"installed.\n");
 		return -ENOENT;
 	}
+
 	/* Check for bits 107 and 108. */
 	if (!css_chsc_characteristics.scssc ||
 	    !css_chsc_characteristics.scsscf) {
@@ -2132,7 +2133,11 @@
 	/* enables the time delay disablement facility. Don't care
 	 * whether it is really there (i.e. we haven't checked for
 	 * it) */
-	scssc_area->word_with_d_bit = 0x10000000;
+	if (css_general_characteristics.aif_tdd)
+		scssc_area->word_with_d_bit = 0x10000000;
+	else
+		QDIO_PRINT_WARN("Time delay disablement facility " \
+				"not available\n");
 
 
 
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