Date: Thu, 6 Jan 2011 14:19:29 +0000 (UTC) From: Colin Percival <cperciva@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r217055 - stable/8/sys/xen/evtchn Message-ID: <201101061419.p06EJTc4017439@svn.freebsd.org>
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Author: cperciva Date: Thu Jan 6 14:19:29 2011 New Revision: 217055 URL: http://svn.freebsd.org/changeset/base/217055 Log: MFC r216812: Implement xenpic_dynirq_disable_intr and thereby avoid a kernel panic when a disk is detached from a XEN system. Modified: stable/8/sys/xen/evtchn/evtchn.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) Modified: stable/8/sys/xen/evtchn/evtchn.c ============================================================================== --- stable/8/sys/xen/evtchn/evtchn.c Thu Jan 6 14:12:24 2011 (r217054) +++ stable/8/sys/xen/evtchn/evtchn.c Thu Jan 6 14:19:29 2011 (r217055) @@ -628,6 +628,7 @@ static void xenpic_dynirq_enable_sou static void xenpic_dynirq_disable_source(struct intsrc *isrc, int); static void xenpic_dynirq_eoi_source(struct intsrc *isrc); static void xenpic_dynirq_enable_intr(struct intsrc *isrc); +static void xenpic_dynirq_disable_intr(struct intsrc *isrc); static void xenpic_pirq_enable_source(struct intsrc *isrc); static void xenpic_pirq_disable_source(struct intsrc *isrc, int); @@ -647,6 +648,7 @@ struct pic xenpic_dynirq_template = { .pic_disable_source = xenpic_dynirq_disable_source, .pic_eoi_source = xenpic_dynirq_eoi_source, .pic_enable_intr = xenpic_dynirq_enable_intr, + .pic_disable_intr = xenpic_dynirq_disable_intr, .pic_vector = xenpic_vector, .pic_source_pending = xenpic_source_pending, .pic_suspend = xenpic_suspend, @@ -716,6 +718,20 @@ xenpic_dynirq_enable_intr(struct intsrc } static void +xenpic_dynirq_disable_intr(struct intsrc *isrc) +{ + unsigned int irq; + struct xenpic_intsrc *xp; + + xp = (struct xenpic_intsrc *)isrc; + mtx_lock_spin(&irq_mapping_update_lock); + irq = xenpic_vector(isrc); + mask_evtchn(evtchn_from_irq(irq)); + xp->xp_masked = 1; + mtx_unlock_spin(&irq_mapping_update_lock); +} + +static void xenpic_dynirq_eoi_source(struct intsrc *isrc) { unsigned int irq;
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