[PATCH xserver] os/inputthread: Ensure pollfd refreshing
Mihail Konev
k.mvc at ya.ru
Sat Oct 15 17:59:05 UTC 2016
When putting a device node into a poll-request list, do not overwrite a
"please-remove" element with the same fd, so that a closed device file
is ospoll_remove'd prior to being ospoll_add'ed.
Before, the opposite order was possible, resulting in ospoll_add
considering the newly opened file being already polled, should it have a
fd for which the "please-remove" has not been procesed yet. In this
case, no further events would be seen from the device.
Signed-off-by: Mihail Konev <k.mvc at ya.ru>
Regressed-in: 52d6a1e832a5e62289dd4f32824ae16a78dfd7e8
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97880
Patchwork: https://patchwork.freedesktop.org/patch/113763/
Hit-and-Reduced-by: Hans de Goede <hdegoede at redhat.com>
Reviewed-and-Reduced-by: Peter Hutterer <peter.hutterer at who-t.net>
---
os/inputthread.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/os/inputthread.c b/os/inputthread.c
index 6aa0a9ce6fb5..ddafa7fe8343 100644
--- a/os/inputthread.c
+++ b/os/inputthread.c
@@ -197,7 +197,7 @@ InputThreadRegisterDev(int fd,
dev = NULL;
xorg_list_for_each_entry(old, &inputThreadInfo->devs, node) {
- if (old->fd == fd) {
+ if (old->fd == fd && old->state != device_state_removed) {
dev = old;
break;
}
@@ -218,6 +218,9 @@ InputThreadRegisterDev(int fd,
dev->readInputProc = readInputProc;
dev->readInputArgs = readInputArgs;
dev->state = device_state_added;
+
+ /* Do not prepend, so that any dev->state == device_state_removed
+ * with the same dev->fd get processed first. */
xorg_list_append(&dev->node, &inputThreadInfo->devs);
}
--
2.9.2
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