Input: always accept EV_SYN in input_event()

Commit 0cd587735205 ("Input: preallocate memory to hold event values")
moved allocation of dev->vals into input_allocate_device(), which caused
input core to accumulate events reported while seeding initial device
state before input_register_device().

However, because EV_SYN is only set in dev->evbit during
input_register_device() (and some drivers also overwrite dev->evbit
directly before registration), any EV_SYN/SYN_REPORT events sent before
registration were dropped by is_event_supported(), leaving those seeded
events stuck in dev->vals until the next SYN_REPORT after registration.

Always accept EV_SYN in input_event() and input_inject_event() without
checking dev->evbit so input_sync() flushes dev->vals as intended.

Reported-by: Karlos Abel <kabel@voidship.net>,
Fixes: 0cd587735205 ("Input: preallocate memory to hold event values")
Cc: stable@vger.kernel.org
Assisted-by: LLM
Acked-by: Jiri Kosina <jkosina@suse.com>
Link: https://patch.msgid.link/asx50uz6iafsyAd5@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

0 files changed, 0 insertions, 0 deletions