aboutsummaryrefslogtreecommitdiff
path: root/arch/s390/kernel/head64.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel/head64.S')
-rw-r--r--arch/s390/kernel/head64.S7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 10bc592c363..9a8263a153c 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -345,6 +345,13 @@ iplstart:
la %r2,.Lreset
lhi %r3,26
diag %r2,%r3,8
+ la %r5,.Lirb
+ stsch 0(%r5) # check if irq is pending
+ tm 30(%r5),0x0f # by verifying if any of the
+ bnz .Lwaitforirq # activity or status control
+ tm 31(%r5),0xff # bits is set in the schib
+ bz .Lnoreset
+.Lwaitforirq:
mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw
.Lwaitrdrirq:
lpsw .Lrdrwaitpsw