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commit 24ef83f6e31d20fc121a7cd732b04b498475fca3 upstream.
The goodix panel sends spurious interrupts after a 'finger up' event,
which always cause a timeout.
We were exiting the interrupt handler by reporting touch_num == 0, but
this was still processed as valid and caused the code to use the
uninitialised point_data, creating spurious key release events.
Report an error from the interrupt handler so as to avoid processing
invalid point_data further.
Signed-off-by: Dmitry Mastykin <dmastykin@astralinux.ru>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Link: https://lore.kernel.org/r/20200316075302.3759-2-dmastykin@astralinux.ru
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9ce35dad5a