From: Linus Walleij linus.walleij@linaro.org
commit 8c3b55a299c325830a987de21dab6a89ecb71164 upstream.
After commit 74d905d2d38a devices requiring the workaround for edge triggered interrupts stopped working.
The hardware needs the quirk to be used before even proceeding to check if the quirk is needed because mxt_acquire_irq() is called before mxt_check_retrigen() is called and at this point pending IRQs need to be checked, and if the workaround is not active, all interrupts will be lost from this point.
Solve this by switching the calls around.
Reported-by: Andre Müller andre.muller@web.de Tested-by: Andre Müller andre.muller@web.de Suggested-by: Dmitry Torokhov dmitry.torokhov@gmail.com Fixes: 74d905d2d38a ("Input: atmel_mxt_ts - only read messages in mxt_acquire_irq() when necessary") Signed-off-by: Linus Walleij linus.walleij@linaro.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20201201123026.1416743-1-linus.walleij@linaro.org Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/input/touchscreen/atmel_mxt_ts.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -2183,11 +2183,11 @@ static int mxt_initialize(struct mxt_dat msleep(MXT_FW_RESET_TIME); }
- error = mxt_acquire_irq(data); + error = mxt_check_retrigen(data); if (error) return error;
- error = mxt_check_retrigen(data); + error = mxt_acquire_irq(data); if (error) return error;