2024-05-10 11:19:19 +00:00
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From f85f63647920c137faabc6ae865d8bed6d9204b9 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Fri, 2 Feb 2024 15:41:29 +0000
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Subject: [PATCH 0130/1085] serial: sc16is7xx: Don't spin if no data received
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There are multiple causes of interrupts, errors being one, and only the
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receipt of data warrants continued polling.
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See: https://github.com/raspberrypi/linux/issues/2676
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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drivers/tty/serial/sc16is7xx.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/drivers/tty/serial/sc16is7xx.c
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+++ b/drivers/tty/serial/sc16is7xx.c
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2024-12-09 23:19:18 +00:00
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@@ -777,6 +777,8 @@ static bool sc16is7xx_port_irq(struct sc
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2024-05-10 11:19:19 +00:00
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if (rxlen)
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sc16is7xx_handle_rx(port, rxlen, iir);
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+ else
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+ rc = false;
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break;
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/* CTSRTS interrupt comes only when CTS goes inactive */
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case SC16IS7XX_IIR_CTSRTS_SRC:
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