Carlos Llamas 82722b453d 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 08:55:06 +01:00
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Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
binder.c	binder: signal epoll threads of self-work	2024-02-23 08:55:06 +01:00
binder_alloc.c	binder: fix race between mmput() and do_exit()	2024-01-25 14:52:46 -08:00
binder_alloc.h	binder: fix memory leak in binder_init()	2023-08-16 18:21:59 +02:00
binder_alloc_selftest.c	Revert "android: binder: stop saving a pointer to the VMA"	2023-06-05 09:21:24 +02:00
binder_internal.h	binder: fix redefinition of seq_file attributes	2022-08-17 14:23:50 +02:00
binder_trace.h	binder: add trace at free transaction.	2020-11-11 08:20:44 +01:00
binderfs.c	binder: fix redefinition of seq_file attributes	2022-08-17 14:23:50 +02:00