media: ite-cir: IR receiver stop working after receive overflow

Origin: https://git.linuxtv.org/media_stage.git/commit/?id=fdc881783099c6343921ff017450831c8766d12a
Bug-Debian: https://bugs.debian.org/996672

On an Intel NUC6iSYK, no IR is reported after a receive overflow.

When a receiver overflow occurs, this condition is only cleared by
reading the fifo. Make sure we read anything in the fifo.

Fixes: 28c7afb07ccf ("media: ite-cir: check for receive overflow")
Suggested-by: Bryan Pass <bryan.pass@gmail.com>
Tested-by: Bryan Pass <bryan.pass@gmail.com>
Cc: stable@vger.kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Gbp-Pq: Topic bugfix/all
Gbp-Pq: Name media-ite-cir-IR-receiver-stop-working-after-receive.patch

diff --git a/drivers/media/rc/ite-cir.c b/drivers/media/rc/ite-cir.c
index 5bc23e8c6d91de4dc0c8eb0fe5ec7d08d0f2808f..4f77d4ebacdc5343e095d169a63cb9e8a2f3597a 100644 (file)
--- a/drivers/media/rc/ite-cir.c
+++ b/drivers/media/rc/ite-cir.c
@@ -242,7 +242,7 @@ static irqreturn_t ite_cir_isr(int irq, void *data)
        }
 
        /* check for the receive interrupt */
-       if (iflags & ITE_IRQ_RX_FIFO) {
+       if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) {
                /* read the FIFO bytes */
                rx_bytes = dev->params->get_rx_bytes(dev, rx_buf,
                                                    ITE_RX_FIFO_LEN);