From: Sven Schnelle <svens@stackframe.org>
Date: Sun, 17 Feb 2019 11:37:17 +0000 (+0100)
Subject: lsi: check if SIGP bit is already set in Wait reselect
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2265e98b72df477a38271787485e2cd33df212b4;p=qemu.git

lsi: check if SIGP bit is already set in Wait reselect

If SIGP is set, the 'Wait for Reselection' command should jump
immediately to the address stored in the second DWORD of the
instruction. This fixes spurious hangs in the HP-UX 11.11
installer when the SIGP bit gets set by the kernel before the
'Wait for Reselection' command is executed by SCRIPTS.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Tested-by: Helge Deller <deller@gmx.de>
Message-Id: <20190217113717.7077-1-svens@stackframe.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
index 8ba07f8756..bcff859bac 100644
--- a/hw/scsi/lsi53c895a.c
+++ b/hw/scsi/lsi53c895a.c
@@ -1297,8 +1297,10 @@ again:
                 }
                 break;
             case 2: /* Wait Reselect */
-                if (!lsi_irq_on_rsl(s)) {
-                    lsi_wait_reselect(s);
+                if (s->istat0 & LSI_ISTAT0_SIGP) {
+                    s->dsp = s->dnad;
+                } else if (!lsi_irq_on_rsl(s)) {
+                        lsi_wait_reselect(s);
                 }
                 break;
             case 3: /* Set */