tree 1c035bdb2b0f0c3ec90677b185ade11273c41725
parent 16ea9b8ac45bf11d48af6013283e141e8ed86348
author Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> 1439474968 +0200
committer Mark Brown <broonie@kernel.org> 1439566519 +0100

spi/spi-xilinx: Fix spurious IRQ ACK on irq mode

The ACK of an inexistent IRQ can trigger an spurious IRQ that breaks the
txrx logic. This has been observed on axi_quad_spi:3.2 core.

This patch only ACKs IRQs that have not been Acknowledge jet.

Reported-by: Edward Kigwana <ekigwana@scires.com>
Tested-by: Edward Kigwana <ekigwana@scires.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org