linux-brain/drivers/xen/xenbus
Julien Grall 18d691d837 arm/xen: Don't probe xenbus as part of an early initcall
commit c4295ab0b485b8bc50d2264bcae2acd06f25caaf upstream.

After Commit 3499ba8198cad ("xen: Fix event channel callback via
INTX/GSI"), xenbus_probe() will be called too early on Arm. This will
recent to a guest hang during boot.

If the hang wasn't there, we would have ended up to call
xenbus_probe() twice (the second time is in xenbus_probe_initcall()).

We don't need to initialize xenbus_probe() early for Arm guest.
Therefore, the call in xen_guest_init() is now removed.

After this change, there is no more external caller for xenbus_probe().
So the function is turned to a static one. Interestingly there were two
prototypes for it.

Cc: stable@vger.kernel.org
Fixes: 3499ba8198cad ("xen: Fix event channel callback via INTX/GSI")
Reported-by: Ian Jackson <iwj@xenproject.org>
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/20210210170654.5377-1-julien@xen.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-17 10:35:14 +01:00
..
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 arm/xen: Don't probe xenbus as part of an early initcall 2021-02-17 10:35:14 +01:00
xenbus_client.c xen/xenbus: Add 'will_handle' callback support in xenbus_watch_path() 2020-12-30 11:51:46 +01:00
xenbus_comms.c xen: Fix event channel callback via INTX/GSI 2021-01-27 11:47:44 +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 arm/xen: Don't probe xenbus as part of an early initcall 2021-02-17 10:35:14 +01:00
xenbus_probe_backend.c xenbus/xenbus_backend: Disallow pending watch messages 2020-12-30 11:51:47 +01:00
xenbus_probe_frontend.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
xenbus_xs.c xen/xenbus: Count pending messages for each watch 2020-12-30 11:51:47 +01:00