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kfifo_put() returns 0 if the FIFO is full. In this case, we must
free the memory allocated for the attention data to avoid a leak.
Fixes: b908d3cd81 ("Input: synaptics-rmi4 - allow to add attention data")
Cc: stable@vger.kernel.org
Assisted-by: Gemini:gemini-3.1-pro
Link: https://patch.msgid.link/20260505045952.1570713-5-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>