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Diffstat (limited to 'sys-kernel/boest-v5.0.15/raspberrypi/0137-sc16is7xx-Don-t-spin-if-no-data-received.patch')
-rw-r--r--sys-kernel/boest-v5.0.15/raspberrypi/0137-sc16is7xx-Don-t-spin-if-no-data-received.patch25
1 files changed, 25 insertions, 0 deletions
diff --git a/sys-kernel/boest-v5.0.15/raspberrypi/0137-sc16is7xx-Don-t-spin-if-no-data-received.patch b/sys-kernel/boest-v5.0.15/raspberrypi/0137-sc16is7xx-Don-t-spin-if-no-data-received.patch
new file mode 100644
index 00000000..db6aa13f
--- /dev/null
+++ b/sys-kernel/boest-v5.0.15/raspberrypi/0137-sc16is7xx-Don-t-spin-if-no-data-received.patch
@@ -0,0 +1,25 @@
+From 7aeb9c283279b594d4cd9e86bc9954e5f24eda0e Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 6 Nov 2018 12:57:48 +0000
+Subject: [PATCH 137/194] sc16is7xx: Don't spin if no data received
+
+See: https://github.com/raspberrypi/linux/issues/2676
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/tty/serial/sc16is7xx.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
+index 114e94f476c6..eac0efb8e836 100644
+--- a/drivers/tty/serial/sc16is7xx.c
++++ b/drivers/tty/serial/sc16is7xx.c
+@@ -696,6 +696,8 @@ static bool sc16is7xx_port_irq(struct sc16is7xx_port *s, int portno)
+ rxlen = sc16is7xx_port_read(port, SC16IS7XX_RXLVL_REG);
+ if (rxlen)
+ sc16is7xx_handle_rx(port, rxlen, iir);
++ else
++ return false;
+ break;
+ case SC16IS7XX_IIR_THRI_SRC:
+ sc16is7xx_handle_tx(port);