[src/trunk]: src/sys/arch/x86/x86 fix: "intrctl list" causes panic when the d...

[knakahara <knakahara%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/6d7f9cded946
branches:  trunk
changeset: 340896:6d7f9cded946
user:      knakahara <knakahara%NetBSD.org@localhost>
date:      Fri Oct 09 12:56:02 2015 +0000

description:
fix: "intrctl list" causes panic when the device using pci_intr_alloc() shares IRQ.

diffstat:

 sys/arch/x86/x86/intr.c |  19 +++++++++++++++++--
 1 files changed, 17 insertions(+), 2 deletions(-)

diffs (40 lines):

diff -r 39ab61f373fc -r 6d7f9cded946 sys/arch/x86/x86/intr.c
--- a/sys/arch/x86/x86/intr.c   Fri Oct 09 07:23:33 2015 +0000
+++ b/sys/arch/x86/x86/intr.c   Fri Oct 09 12:56:02 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: intr.c,v 1.88 2015/10/06 09:44:31 knakahara Exp $      */
+/*     $NetBSD: intr.c,v 1.89 2015/10/09 12:56:02 knakahara Exp $      */
 
 /*-
  * Copyright (c) 2007, 2008, 2009 The NetBSD Foundation, Inc.
@@ -133,7 +133,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.88 2015/10/06 09:44:31 knakahara Exp $");
+__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.89 2015/10/09 12:56:02 knakahara Exp $");
 
 #include "opt_intrdebug.h"
 #include "opt_multiprocessor.h"
@@ -1007,6 +1007,21 @@
                /* NOTREACHED */
        }
 
+        /*
+        * If the establishing interrupt uses shared IRQ, the interrupt uses
+        * "ci->ci_isources[slot]" instead of allocated by the establishing
+        * device's pci_intr_alloc() or this function.
+        */
+       if (source->is_handlers != NULL) {
+               struct intrsource *isp;
+
+               SIMPLEQ_FOREACH(isp, &io_interrupt_sources, is_list) {
+                       if (strncmp(intrstr, isp->is_intrid, INTRIDBUF - 1) == 0
+                           && isp->is_handlers == NULL)
+                               intr_free_io_intrsource_direct(isp);
+               }
+       }
+
        /*
         * We're now committed.  Mask the interrupt in hardware and
         * count it for load distribution.