Messages in this thread | | | From | Oleksandr Andrushchenko <> | Subject | [PATCH] xen: fix frontend driver disconnected from xenbus on removal | Date | Thu, 1 Feb 2018 10:57:18 +0200 |
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From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Hi, all!
While working on DRM PV frontend driver I faced an issue with driver removal, e.g. when driver's .remove callback is called the driver is already disconnected form the xenbus and it is not possible to synchronize the process of removal with the backend. Backend in my case is a user-space application, so this may explain why backends which are kernel modules do not suffer from this: it seems that user-space is clumsy and its states are not delivered through xenbus fast enough.
The obvious way to fix this behavior is to disconnect frontend drivers from xenbus _after_ their .remove callback is called.
Thank you, Oleksandr Andrushchenko
Oleksandr Andrushchenko (1): xen: fix frontend driver disconnected from xenbus on removal
drivers/xen/xenbus/xenbus_probe.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
-- 2.7.4
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