[patch 15/16] s390: pending interrupt after ipl from reader.

[Martin Schwidefsky]

[patch 15/16] s390: pending interrupt after ipl from reader.

From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>

Wait for interrupt and clear status pending after resetting the reader.

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

diffstat:
 arch/s390/kernel/head.S   |   19 +++++++++++++++++--
 arch/s390/kernel/head64.S |   19 +++++++++++++++++--
 2 files changed, 34 insertions(+), 4 deletions(-)

diff -urpN linux-2.6/arch/s390/kernel/head64.S linux-2.6-patched/arch/s390/kernel/head64.S
--- linux-2.6/arch/s390/kernel/head64.S	2005-06-21 17:36:55.000000000 +0200
+++ linux-2.6-patched/arch/s390/kernel/head64.S	2005-06-21 17:36:55.000000000 +0200
@@ -344,10 +344,25 @@ iplstart:
 	bno   .Lnoreset
         la    %r2,.Lreset              
         lhi   %r3,26
-        .long 0x83230008
+	diag  %r2,%r3,8
+	mvc   0x78(8),.Lrdrnewpsw	       # set up IO interrupt psw
+.Lwaitrdrirq:
+	lpsw  .Lrdrwaitpsw
+.Lrdrint:
+	c     %r1,0xb8			       # compare subchannel number
+	bne   .Lwaitrdrirq
+	la    %r5,.Lirb
+	tsch  0(%r5)
 .Lnoreset:
+	b     .Lnoload
+
+	.align 8
+.Lrdrnewpsw:
+	.long  0x00080000,0x80000000+.Lrdrint
+.Lrdrwaitpsw:
+	.long  0x020a0000,0x80000000+.Lrdrint
 #endif
-	
+
 #
 # everything loaded, go for it
 #
diff -urpN linux-2.6/arch/s390/kernel/head.S linux-2.6-patched/arch/s390/kernel/head.S
--- linux-2.6/arch/s390/kernel/head.S	2005-06-21 17:36:55.000000000 +0200
+++ linux-2.6-patched/arch/s390/kernel/head.S	2005-06-21 17:36:55.000000000 +0200
@@ -345,10 +345,25 @@ iplstart:
 	bno   .Lnoreset
         la    %r2,.Lreset              
         lhi   %r3,26
-        .long 0x83230008
+	diag  %r2,%r3,8
+	mvc   0x78(8),.Lrdrnewpsw              # set up IO interrupt psw
+.Lwaitrdrirq:
+	lpsw  .Lrdrwaitpsw
+.Lrdrint:
+	c     %r1,0xb8                         # compare subchannel number
+	bne   .Lwaitrdrirq
+	la    %r5,.Lirb
+	tsch  0(%r5)
 .Lnoreset:
+        b     .Lnoload
+
+	.align 8
+.Lrdrnewpsw:
+	.long  0x00080000,0x80000000+.Lrdrint
+.Lrdrwaitpsw:
+	.long  0x020a0000,0x80000000+.Lrdrint
 #endif
-	
+
 #
 # everything loaded, go for it
 #
-
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