From: Biju Das biju.das.jz@bp.renesas.com
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@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 --- drivers/tty/serial/sh-sci.c | 8 ++++++++ 1 file changed, 8 insertions(+)
--- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -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> @@ -2923,6 +2924,13 @@ static int sci_init_single(struct platfo 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.