Carlos Llamas a7ae586f6f binder: signal epoll threads of self-work ... commit 97830f3c30 upstream. In (e)poll mode, threads often depend on I/O events to determine when data is ready for consumption. Within binder, a thread may initiate a command via BINDER_WRITE_READ without a read buffer and then make use of epoll_wait() or similar to consume any responses afterwards. It is then crucial that epoll threads are signaled via wakeup when they queue their own work. Otherwise, they risk waiting indefinitely for an event leaving their work unhandled. What is worse, subsequent commands won't trigger a wakeup either as the thread has pending work. Fixes: 457b9a6f09 ("Staging: android: add binder driver") Cc: Arve Hjønnevåg <arve@android.com> Cc: Martijn Coenen <maco@android.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Steven Moreland <smoreland@google.com> Cc: stable@vger.kernel.org # v4.19+ Signed-off-by: Carlos Llamas <cmllamas@google.com> Link: https://lore.kernel.org/r/20240131215347.1808751-1-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-02-23 09:25:04 +01:00
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binder_alloc_selftest.c	Revert "android: binder: stop saving a pointer to the VMA"	2023-05-13 20:30:16 +09:00
binder_alloc.c	binder: fix race between mmput() and do_exit()	2024-01-25 15:35:42 -08:00
binder_alloc.h	binder: fix memory leak in binder_init()	2023-08-04 15:25:01 +02:00
binder_internal.h	Binder: Add async from to transaction record	2023-05-13 20:38:12 +09:00
binder_trace.h	Binder: add TF_UPDATE_TXN to replace outdated txn	2022-06-27 16:16:30 +02:00
binder.c	binder: signal epoll threads of self-work	2024-02-23 09:25:04 +01:00
binderfs.c	Char/Misc driver changes for 6.6-rc1	2023-09-01 09:53:54 -07:00
Kconfig	remove CONFIG_ANDROID	2022-07-01 10:41:09 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00