Commit b43a1864 authored by Biju Das's avatar Biju Das Committed by Greg Kroah-Hartman
Browse files

tty: serial: sh-sci: Fix transmit end interrupt handler 



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: e1d0be61 ("sh-sci: Add h8300 SCI")
Cc: stable <stable@kernel.org>
Suggested-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20230317150403.154094-1-biju.das.jz@bp.renesas.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e8d018dd

drivers/tty/serial/sh-sci.c

+8 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <linux/ioport.h>

#include <linux/ktime.h>

#include <linux/major.h>

#include <linux/minmax.h>

#include <linux/module.h>

#include <linux/mm.h>

#include <linux/of.h>
@@ -2864,6 +2865,13 @@ static int sci_init_single(struct platform_device *dev, 
			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.