Carlos Llamas dd64bb8329 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 08:12:57 +01:00
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Kconfig	android: binder: Drop dependency on !M68K	2018-07-07 17:44:52 +02:00
Makefile	android: binder: Add allocator selftest	2017-08-28 16:47:17 +02:00
binder.c	binder: signal epoll threads of self-work	2024-02-23 08:12:57 +01:00
binder_alloc.c	binder: fix unused alloc->free_async_space	2024-01-25 14:33:37 -08:00
binder_alloc.h	binder: fix memory leak in binder_init()	2023-08-16 18:13:00 +02:00
binder_alloc_selftest.c	android: binder: Add global lru shrinker to binder	2017-08-28 16:47:17 +02:00
binder_trace.h	android: binder: Show extra_buffers_size in trace	2018-08-02 10:34:12 +02:00