Commit cc4c2fc2 authored Mar 17, 2023 by Biju Das Committed by Greg Kroah-Hartman Apr 20, 2023

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



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: e1d0be61 ("sh-sci: Add h8300 SCI")
Cc: stable <stable@kernel.org>
Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Biju 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 80947117

drivers/tty/serial/sh-sci.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -2908,6 +2908,13 @@ static int sci_init_single(struct platform_device *dev,
		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.