David Woodhouse 5f46400f7a xen: Fix XenStore initialisation for XS_LOCAL ... In commit 3499ba8198 ("xen: Fix event channel callback via INTX/GSI") I reworked the triggering of xenbus_probe(). I tried to simplify things by taking out the workqueue based startup triggered from wake_waiting(); the somewhat poorly named xenbus IRQ handler. I missed the fact that in the XS_LOCAL case (Dom0 starting its own xenstored or xenstore-stubdom, which happens after the kernel is booted completely), that IRQ-based trigger is still actually needed. So... put it back, except more cleanly. By just spawning a xenbus_probe thread which waits on xb_waitq and runs the probe the first time it gets woken, just as the workqueue-based hack did. This is actually a nicer approach for *all* the back ends with different interrupt methods, and we can switch them all over to that without the complex conditions for when to trigger it. But not in -rc6. This is the minimal fix for the regression, although it's a step in the right direction instead of doing a partial revert and actually putting the workqueue back. It's also simpler than the workqueue. Fixes: 3499ba8198 ("xen: Fix event channel callback via INTX/GSI") Reported-by: Juergen Gross <jgross@suse.com> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/4c9af052a6e0f6485d1de43f2c38b1461996db99.camel@infradead.org Signed-off-by: Juergen Gross <jgross@suse.com>		2021-01-27 08:59:52 +01:00
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Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xenbus.h	xen: Fix event channel callback via INTX/GSI	2021-01-13 16:12:00 +01:00
xenbus_client.c	xen/xenbus: Add 'will_handle' callback support in xenbus_watch_path()	2020-12-14 10:04:18 +01:00
xenbus_comms.c	xen: Fix event channel callback via INTX/GSI	2021-01-13 16:12:00 +01:00
xenbus_dev_backend.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xenbus_dev_frontend.c	xen/xenbus: fix self-deadlock after killing user process	2019-10-02 16:40:11 -04:00
xenbus_probe.c	xen: Fix XenStore initialisation for XS_LOCAL	2021-01-27 08:59:52 +01:00
xenbus_probe_backend.c	xenbus/xenbus_backend: Disallow pending watch messages	2020-12-14 10:08:40 +01:00
xenbus_probe_frontend.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
xenbus_xs.c	xen/xenbus: Count pending messages for each watch	2020-12-14 10:07:13 +01:00