This is a note to let you know that I've just added the patch titled
tty: serial: sh-sci: Fix transmit end interrupt handler
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tty-serial-sh-sci-fix-transmit-end-interrupt-handler.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b43a18647f03c87e77d50d6fe74904b61b96323e Mon Sep 17 00:00:00 2001
From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Date: Fri, 17 Mar 2023 15:04:03 +0000
Subject: tty: serial: sh-sci: Fix transmit end interrupt handler
From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
commit b43a18647f03c87e77d50d6fe74904b61b96323e upstream.
The fourth interrupt on SCI port is transmit end interrupt compared to
the break interrupt on other port types. So, shuffle the interrupts to fix
the transmit end interrupt handler.
Fixes: e1d0be616186 ("sh-sci: Add h8300 SCI")
Cc: stable <stable@xxxxxxxxxx>
Suggested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230317150403.154094-1-biju.das.jz@xxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/sh-sci.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2908,6 +2908,13 @@ static int sci_init_single(struct platfo
for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i)
sci_port->irqs[i] = platform_get_irq(dev, i);
+ /*
+ * The fourth interrupt on SCI port is transmit end interrupt, so
+ * shuffle the interrupts.
+ */
+ if (p->type == PORT_SCI)
+ swap(sci_port->irqs[SCIx_BRI_IRQ], sci_port->irqs[SCIx_TEI_IRQ]);
+
/* The SCI generates several interrupts. They can be muxed together or
* connected to different interrupt lines. In the muxed case only one
* interrupt resource is specified as there is only one interrupt ID.
Patches currently in stable-queue which might be from biju.das.jz@xxxxxxxxxxxxxx are
queue-4.19/tty-serial-sh-sci-fix-transmit-end-interrupt-handler.patch
queue-4.19/tty-serial-sh-sci-fix-rx-on-rz-g2l-sci.patch
